Port of Duke Nukem 3D

This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL
for Rockbox.

Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9

apps/plugins/sdl/src/thread/SDL_systhread.h

@@ -0,0 +1,52 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* These are functions that need to be implemented by a port of SDL */
+
+#ifndef _SDL_systhread_h
+#define _SDL_systhread_h
+
+#include "SDL_thread.h"
+
+/* This function creates a thread, passing args to SDL_RunThread(),
+   saves a system-dependent thread id in thread->id, and returns 0
+   on success.
+*/
+#ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
+extern int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread);
+#else
+extern int SDL_SYS_CreateThread(SDL_Thread *thread, void *args);
+#endif
+
+/* This function does any necessary setup in the child thread */
+extern void SDL_SYS_SetupThread(void);
+
+/* This function waits for the thread to finish and frees any data
+   allocated by SDL_SYS_CreateThread()
+ */
+extern void SDL_SYS_WaitThread(SDL_Thread *thread);
+
+/* This function kills the thread and returns */
+extern void SDL_SYS_KillThread(SDL_Thread *thread);
+
+#endif /* _SDL_systhread_h */

apps/plugins/sdl/src/thread/SDL_thread.c

@@ -0,0 +1,300 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* System independent thread management routines for SDL */
+
+#include "SDL_mutex.h"
+#include "SDL_thread.h"
+#include "SDL_thread_c.h"
+#include "SDL_systhread.h"
+
+#define ARRAY_CHUNKSIZE	32
+/* The array of threads currently active in the application
+   (except the main thread)
+   The manipulation of an array here is safer than using a linked list.
+*/
+static int SDL_maxthreads = 0;
+static int SDL_numthreads = 0;
+static SDL_Thread **SDL_Threads = NULL;
+static SDL_mutex *thread_lock = NULL;
+
+int SDL_ThreadsInit(void)
+{
+	int retval;
+
+	retval = 0;
+	thread_lock = SDL_CreateMutex();
+	if ( thread_lock == NULL ) {
+		retval = -1;
+	}
+	return(retval);
+}
+
+/* This should never be called...
+   If this is called by SDL_Quit(), we don't know whether or not we should
+   clean up threads here.  If any threads are still running after this call,
+   they will no longer have access to any per-thread data.
+ */
+void SDL_ThreadsQuit(void)
+{
+	SDL_mutex *mutex;
+
+	mutex = thread_lock;
+	thread_lock = NULL;
+	if ( mutex != NULL ) {
+		SDL_DestroyMutex(mutex);
+	}
+}
+
+/* Routines for manipulating the thread list */
+static void SDL_AddThread(SDL_Thread *thread)
+{
+	/* WARNING:
+	   If the very first threads are created simultaneously, then
+	   there could be a race condition causing memory corruption.
+	   In practice, this isn't a problem because by definition there
+	   is only one thread running the first time this is called.
+	*/
+	if ( !thread_lock ) {
+		if ( SDL_ThreadsInit() < 0 ) {
+			return;
+		}
+	}
+	SDL_mutexP(thread_lock);
+
+	/* Expand the list of threads, if necessary */
+#ifdef DEBUG_THREADS
+	printf("Adding thread (%d already - %d max)\n",
+			SDL_numthreads, SDL_maxthreads);
+#endif
+	if ( SDL_numthreads == SDL_maxthreads ) {
+		SDL_Thread **threads;
+		threads = (SDL_Thread **)SDL_realloc(SDL_Threads,
+			(SDL_maxthreads+ARRAY_CHUNKSIZE)*(sizeof *threads));
+		if ( threads == NULL ) {
+			SDL_OutOfMemory();
+			goto done;
+		}
+		SDL_maxthreads += ARRAY_CHUNKSIZE;
+		SDL_Threads = threads;
+	}
+	SDL_Threads[SDL_numthreads++] = thread;
+done:
+	SDL_mutexV(thread_lock);
+}
+
+static void SDL_DelThread(SDL_Thread *thread)
+{
+	int i;
+
+	if ( !thread_lock ) {
+		return;
+	}
+	SDL_mutexP(thread_lock);
+	for ( i=0; i<SDL_numthreads; ++i ) {
+		if ( thread == SDL_Threads[i] ) {
+			break;
+		}
+	}
+	if ( i < SDL_numthreads ) {
+		if ( --SDL_numthreads > 0 ) {
+			while ( i < SDL_numthreads ) {
+				SDL_Threads[i] = SDL_Threads[i+1];
+				++i;
+			}
+		} else {
+			SDL_maxthreads = 0;
+			SDL_free(SDL_Threads);
+			SDL_Threads = NULL;
+		}
+#ifdef DEBUG_THREADS
+		printf("Deleting thread (%d left - %d max)\n",
+				SDL_numthreads, SDL_maxthreads);
+#endif
+	}
+	SDL_mutexV(thread_lock);
+
+#if 0	/* There could be memory corruption if another thread is starting */
+	if ( SDL_Threads == NULL ) {
+		SDL_ThreadsQuit();
+	}
+#endif
+}
+
+/* The default (non-thread-safe) global error variable */
+static SDL_error SDL_global_error;
+
+/* Routine to get the thread-specific error variable */
+SDL_error *SDL_GetErrBuf(void)
+{
+	SDL_error *errbuf;
+
+	errbuf = &SDL_global_error;
+	if ( SDL_Threads ) {
+		int i;
+		Uint32 this_thread;
+
+		this_thread = SDL_ThreadID();
+		SDL_mutexP(thread_lock);
+		for ( i=0; i<SDL_numthreads; ++i ) {
+			if ( this_thread == SDL_Threads[i]->threadid ) {
+				errbuf = &SDL_Threads[i]->errbuf;
+				break;
+			}
+		}
+		SDL_mutexV(thread_lock);
+	}
+	return(errbuf);
+}
+
+
+/* Arguments and callback to setup and run the user thread function */
+typedef struct {
+	int (SDLCALL *func)(void *);
+	void *data;
+	SDL_Thread *info;
+	SDL_sem *wait;
+} thread_args;
+
+void SDL_RunThread(void *data)
+{
+	thread_args *args;
+	int (SDLCALL *userfunc)(void *);
+	void *userdata;
+	int *statusloc;
+
+	/* Perform any system-dependent setup
+	   - this function cannot fail, and cannot use SDL_SetError()
+	 */
+	SDL_SYS_SetupThread();
+
+	/* Get the thread id */
+	args = (thread_args *)data;
+	args->info->threadid = SDL_ThreadID();
+
+	/* Figure out what function to run */
+	userfunc = args->func;
+	userdata = args->data;
+	statusloc = &args->info->status;
+
+	/* Wake up the parent thread */
+	SDL_SemPost(args->wait);
+
+	/* Run the function */
+	*statusloc = userfunc(userdata);
+}
+
+#ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
+#undef SDL_CreateThread
+DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
+#else
+DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data)
+#endif
+{
+	SDL_Thread *thread;
+	thread_args *args;
+	int ret;
+
+	/* Allocate memory for the thread info structure */
+	thread = (SDL_Thread *)SDL_malloc(sizeof(*thread));
+	if ( thread == NULL ) {
+		SDL_OutOfMemory();
+		return(NULL);
+	}
+	SDL_memset(thread, 0, (sizeof *thread));
+	thread->status = -1;
+
+	/* Set up the arguments for the thread */
+	args = (thread_args *)SDL_malloc(sizeof(*args));
+	if ( args == NULL ) {
+		SDL_OutOfMemory();
+		SDL_free(thread);
+		return(NULL);
+	}
+	args->func = fn;
+	args->data = data;
+	args->info = thread;
+	args->wait = SDL_CreateSemaphore(0);
+	if ( args->wait == NULL ) {
+		SDL_free(thread);
+		SDL_free(args);
+		return(NULL);
+	}
+
+	/* Add the thread to the list of available threads */
+	SDL_AddThread(thread);
+
+	/* Create the thread and go! */
+#ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
+	ret = SDL_SYS_CreateThread(thread, args, pfnBeginThread, pfnEndThread);
+#else
+	ret = SDL_SYS_CreateThread(thread, args);
+#endif
+	if ( ret >= 0 ) {
+		/* Wait for the thread function to use arguments */
+		SDL_SemWait(args->wait);
+	} else {
+		/* Oops, failed.  Gotta free everything */
+		SDL_DelThread(thread);
+		SDL_free(thread);
+		thread = NULL;
+	}
+	SDL_DestroySemaphore(args->wait);
+	SDL_free(args);
+
+	/* Everything is running now */
+	return(thread);
+}
+
+void SDL_WaitThread(SDL_Thread *thread, int *status)
+{
+	if ( thread ) {
+		SDL_SYS_WaitThread(thread);
+		if ( status ) {
+			*status = thread->status;
+		}
+		SDL_DelThread(thread);
+		SDL_free(thread);
+	}
+}
+
+Uint32 SDL_GetThreadID(SDL_Thread *thread)
+{
+	Uint32 id;
+
+	if ( thread ) {
+		id = thread->threadid;
+	} else {
+		id = SDL_ThreadID();
+	}
+	return(id);
+}
+
+void SDL_KillThread(SDL_Thread *thread)
+{
+	if ( thread ) {
+		SDL_SYS_KillThread(thread);
+		SDL_WaitThread(thread, NULL);
+	}
+}
+

apps/plugins/sdl/src/thread/SDL_thread_c.h

@@ -0,0 +1,66 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_thread_c_h
+#define _SDL_thread_c_h
+
+/* Need the definitions of SYS_ThreadHandle */
+#if SDL_THREADS_DISABLED
+#include "generic/SDL_systhread_c.h"
+#elif SDL_THREAD_BEOS
+#include "beos/SDL_systhread_c.h"
+#elif SDL_THREAD_DC
+#include "dc/SDL_systhread_c.h"
+#elif SDL_THREAD_OS2
+#include "os2/SDL_systhread_c.h"
+#elif SDL_THREAD_PTH
+#include "pth/SDL_systhread_c.h"
+#elif SDL_THREAD_PTHREAD
+#include "pthread/SDL_systhread_c.h"
+#elif SDL_THREAD_SPROC
+#include "irix/SDL_systhread_c.h"
+#elif SDL_THREAD_WIN32
+#include "win32/SDL_systhread_c.h"
+#elif SDL_THREAD_SYMBIAN
+#include "symbian/SDL_systhread_c.h"
+#elif SDL_THREAD_ROCKBOX
+#include "rockbox/SDL_systhread_c.h"
+#else
+#error Need thread implementation for this platform
+#include "generic/SDL_systhread_c.h"
+#endif
+#include "../SDL_error_c.h"
+
+/* This is the system-independent thread info structure */
+struct SDL_Thread {
+	Uint32 threadid;
+	SYS_ThreadHandle handle;
+	int status;
+	SDL_error errbuf;
+	void *data;
+};
+
+/* This is the function called to run a thread */
+extern void SDL_RunThread(void *data);
+
+#endif /* _SDL_thread_c_h */

apps/plugins/sdl/src/thread/beos/SDL_syssem.c

@@ -0,0 +1,142 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Semaphores in the BeOS environment */
+
+#include <be/kernel/OS.h>
+
+#include "SDL_thread.h"
+
+
+struct SDL_semaphore {
+	sem_id id;
+};
+
+/* Create a counting semaphore */
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_sem *sem;
+
+	sem = (SDL_sem *)SDL_malloc(sizeof(*sem));
+	if ( sem ) {
+		sem->id = create_sem(initial_value, "SDL semaphore");
+		if ( sem->id < B_NO_ERROR ) {
+			SDL_SetError("create_sem() failed");
+			SDL_free(sem);
+			sem = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(sem);
+}
+
+/* Free the semaphore */
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( sem ) {
+		if ( sem->id >= B_NO_ERROR ) {
+			delete_sem(sem->id);
+		}
+		SDL_free(sem);
+	}
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int32 val;
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+  tryagain:
+	if ( timeout == SDL_MUTEX_MAXWAIT ) {
+		val = acquire_sem(sem->id);
+	} else {
+		timeout *= 1000; /* BeOS uses a timeout in microseconds */
+		val = acquire_sem_etc(sem->id, 1, B_RELATIVE_TIMEOUT, timeout);
+	}
+	switch (val) {
+	    case B_INTERRUPTED:
+		goto tryagain;
+	    case B_NO_ERROR:
+		retval = 0;
+		break;
+	    case B_TIMED_OUT:
+		retval = SDL_MUTEX_TIMEDOUT;
+		break;
+	    case B_WOULD_BLOCK:
+		retval = SDL_MUTEX_TIMEDOUT;
+		break;
+	    default:
+		SDL_SetError("acquire_sem() failed");
+		retval = -1;
+		break;
+	}
+
+	return retval;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	return SDL_SemWaitTimeout(sem, 0);
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+/* Returns the current count of the semaphore */
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	int32 count;
+	Uint32 value;
+
+	value = 0;
+	if ( sem ) {
+		get_sem_count(sem->id, &count);
+		if ( count > 0 ) {
+			value = (Uint32)count;
+		}
+	}
+	return value;
+}
+
+/* Atomically increases the semaphore's count (not blocking) */
+int SDL_SemPost(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	if ( release_sem(sem->id) != B_NO_ERROR ) {
+		SDL_SetError("release_sem() failed");
+		return -1;
+	}
+	return 0;
+}

apps/plugins/sdl/src/thread/beos/SDL_systhread.c

@@ -0,0 +1,96 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* BeOS thread management routines for SDL */
+
+#include <stdio.h>
+#include <signal.h>
+#include <be/kernel/OS.h>
+
+#include "SDL_mutex.h"
+#include "SDL_thread.h"
+#include "../SDL_thread_c.h"
+#include "../SDL_systhread.h"
+
+
+static int sig_list[] = {
+	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGWINCH, 0
+};
+
+void SDL_MaskSignals(sigset_t *omask)
+{
+	sigset_t mask;
+	int i;
+
+	sigemptyset(&mask);
+	for ( i=0; sig_list[i]; ++i ) {
+		sigaddset(&mask, sig_list[i]);
+	}
+	sigprocmask(SIG_BLOCK, &mask, omask);
+}
+void SDL_UnmaskSignals(sigset_t *omask)
+{
+	sigprocmask(SIG_SETMASK, omask, NULL);
+}
+
+static int32 RunThread(void *data)
+{
+	SDL_RunThread(data);
+	return(0);
+}
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	/* Create the thread and go! */
+	thread->handle=spawn_thread(RunThread, "SDL", B_NORMAL_PRIORITY, args);
+	if ( (thread->handle == B_NO_MORE_THREADS) ||
+	     (thread->handle == B_NO_MEMORY) ) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+	resume_thread(thread->handle);
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	/* Mask asynchronous signals for this thread */
+	SDL_MaskSignals(NULL);
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return((Uint32)find_thread(NULL));
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	status_t the_status;
+
+	wait_for_thread(thread->handle, &the_status);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	kill_thread(thread->handle);
+}

apps/plugins/sdl/src/thread/beos/SDL_systhread_c.h

@@ -0,0 +1,31 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include <signal.h>
+#include <be/kernel/OS.h>
+
+typedef thread_id SYS_ThreadHandle;
+
+/* Functions needed to work with system threads in other portions of SDL */
+extern void SDL_MaskSignals(sigset_t *omask);
+extern void SDL_UnmaskSignals(sigset_t *omask);

apps/plugins/sdl/src/thread/dc/SDL_syscond.c

@@ -0,0 +1,215 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of condition variables using semaphores and mutexes */
+/*
+   This implementation borrows heavily from the BeOS condition variable
+   implementation, written by Christopher Tate and Owen Smith.  Thanks!
+ */
+
+#include "SDL_thread.h"
+
+struct SDL_cond
+{
+	SDL_mutex *lock;
+	int waiting;
+	int signals;
+	SDL_sem *wait_sem;
+	SDL_sem *wait_done;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		cond->lock = SDL_CreateMutex();
+		cond->wait_sem = SDL_CreateSemaphore(0);
+		cond->wait_done = SDL_CreateSemaphore(0);
+		cond->waiting = cond->signals = 0;
+		if ( ! cond->lock || ! cond->wait_sem || ! cond->wait_done ) {
+			SDL_DestroyCond(cond);
+			cond = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		if ( cond->wait_sem ) {
+			SDL_DestroySemaphore(cond->wait_sem);
+		}
+		if ( cond->wait_done ) {
+			SDL_DestroySemaphore(cond->wait_done);
+		}
+		if ( cond->lock ) {
+			SDL_DestroyMutex(cond->lock);
+		}
+		SDL_free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		++cond->signals;
+		SDL_SemPost(cond->wait_sem);
+		SDL_UnlockMutex(cond->lock);
+		SDL_SemWait(cond->wait_done);
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		int i, num_waiting;
+
+		num_waiting = (cond->waiting - cond->signals);
+		cond->signals = cond->waiting;
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemPost(cond->wait_sem);
+		}
+		/* Now all released threads are blocked here, waiting for us.
+		   Collect them all (and win fabulous prizes!) :-)
+		 */
+		SDL_UnlockMutex(cond->lock);
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemWait(cond->wait_done);
+		}
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Wait on the condition variable for at most 'ms' milliseconds.
+   The mutex must be locked before entering this function!
+   The mutex is unlocked during the wait, and locked again after the wait.
+
+Typical use:
+
+Thread A:
+	SDL_LockMutex(lock);
+	while ( ! condition ) {
+		SDL_CondWait(cond);
+	}
+	SDL_UnlockMutex(lock);
+
+Thread B:
+	SDL_LockMutex(lock);
+	...
+	condition = true;
+	...
+	SDL_UnlockMutex(lock);
+ */
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* Obtain the protection mutex, and increment the number of waiters.
+	   This allows the signal mechanism to only perform a signal if there
+	   are waiting threads.
+	 */
+	SDL_LockMutex(cond->lock);
+	++cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Unlock the mutex, as is required by condition variable semantics */
+	SDL_UnlockMutex(mutex);
+
+	/* Wait for a signal */
+	if ( ms == SDL_MUTEX_MAXWAIT ) {
+		retval = SDL_SemWait(cond->wait_sem);
+	} else {
+		retval = SDL_SemWaitTimeout(cond->wait_sem, ms);
+	}
+
+	/* Let the signaler know we have completed the wait, otherwise
+           the signaler can race ahead and get the condition semaphore
+           if we are stopped between the mutex unlock and semaphore wait,
+           giving a deadlock.  See the following URL for details:
+        http://www-classic.be.com/aboutbe/benewsletter/volume_III/Issue40.html
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->signals > 0 ) {
+		/* If we timed out, we need to eat a condition signal */
+		if ( retval > 0 ) {
+			SDL_SemWait(cond->wait_sem);
+		}
+		/* We always notify the signal thread that we are done */
+		SDL_SemPost(cond->wait_done);
+
+		/* Signal handshake complete */
+		--cond->signals;
+	}
+	--cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Lock the mutex, as is required by condition variable semantics */
+	SDL_LockMutex(mutex);
+
+	return retval;
+}
+
+/* Wait on the condition variable forever */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
+}

apps/plugins/sdl/src/thread/dc/SDL_syscond_c.h

@@ -0,0 +1,23 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+

apps/plugins/sdl/src/thread/dc/SDL_sysmutex.c

@@ -0,0 +1,122 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of mutexes using semaphores */
+
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+#include <arch/spinlock.h>
+
+struct SDL_mutex {
+	int recursive;
+	Uint32 owner;
+	spinlock_t mutex;
+};
+
+/* Create a mutex */
+SDL_mutex *SDL_CreateMutex(void)
+{
+	SDL_mutex *mutex;
+
+	/* Allocate mutex memory */
+	mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
+	if ( mutex ) {
+		spinlock_init(&mutex->mutex);
+		mutex->recursive = 0;
+		mutex->owner = 0;
+	} else {
+		SDL_OutOfMemory();
+	}
+	return mutex;
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) {
+		SDL_free(mutex);
+	}
+}
+
+/* Lock the semaphore */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+#if SDL_THREADS_DISABLED
+	return  SDL_arraysize(return ),0;
+#else
+	Uint32 this_thread;
+
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	this_thread = SDL_ThreadID();
+	if ( mutex->owner == this_thread ) {
+		++mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   We set the locking thread id after we obtain the lock
+		   so unlocks from other threads will fail.
+		*/
+		spinlock_lock(&mutex->mutex);
+		mutex->owner = this_thread;
+		mutex->recursive = 0;
+	}
+
+	return 0;
+#endif /* SDL_THREADS_DISABLED */
+}
+
+/* Unlock the mutex */
+int SDL_mutexV(SDL_mutex *mutex)
+{
+#if SDL_THREADS_DISABLED
+	return 0;
+#else
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	/* If we don't own the mutex, we can't unlock it */
+	if ( SDL_ThreadID() != mutex->owner ) {
+		SDL_SetError("mutex not owned by this thread");
+		return -1;
+	}
+
+	if ( mutex->recursive ) {
+		--mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   First reset the owner so another thread doesn't lock
+		   the mutex and set the ownership before we reset it,
+		   then release the lock semaphore.
+		 */
+		mutex->owner = 0;
+		spinlock_unlock(&mutex->mutex);
+	}
+	return 0;
+#endif /* SDL_THREADS_DISABLED */
+}

apps/plugins/sdl/src/thread/dc/SDL_sysmutex_c.h

@@ -0,0 +1,23 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+

apps/plugins/sdl/src/thread/dc/SDL_syssem.c

@@ -0,0 +1,173 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#include <errno.h>
+
+#include "SDL_config.h"
+
+/* An implementation of semaphores using mutexes and condition variables */
+
+#include "SDL_timer.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+#if SDL_THREADS_DISABLED
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return (SDL_sem *)0;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	return;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	return 0;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+#else
+
+#include <kos/sem.h>
+
+struct SDL_semaphore
+{
+	semaphore_t sem;
+};
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	return (SDL_sem *)sem_create(initial_value);
+}
+
+/* WARNING:
+   You cannot call this function when another thread is using the semaphore.
+*/
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return;
+	}
+
+	sem_destroy(&sem->sem);
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = sem_trywait(&sem->sem);
+	if (retval==0) return 0;
+	else return SDL_MUTEX_TIMEDOUT;
+
+	return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	/* A timeout of 0 is an easy case */
+	if ( timeout == 0 ) {
+		return SDL_SemTryWait(sem);
+	}
+
+	retval = sem_wait_timed(&sem->sem,timeout);
+	if (retval==-1) retval= SDL_MUTEX_TIMEDOUT;
+
+	return retval;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	while ( ((retval = sem_wait(&sem->sem)) == -1) && (errno == EINTR) ) {}
+	return retval;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	return sem_count(&sem->sem);
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	sem_signal(&sem->sem);
+	return 0;
+}
+
+#endif /* SDL_THREADS_DISABLED */

apps/plugins/sdl/src/thread/dc/SDL_syssem_c.h

@@ -0,0 +1,23 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+

apps/plugins/sdl/src/thread/dc/SDL_systhread.c

@@ -0,0 +1,60 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Thread management routines for SDL */
+
+#include "SDL_thread.h"
+#include "../SDL_thread_c.h"
+#include "../SDL_systhread.h"
+
+#include <kos/thread.h>
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	thread->handle = thd_create(SDL_RunThread,args);
+	if (thread->handle == NULL) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return (Uint32)thd_get_current();
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	thd_wait(thread->handle);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	thd_destroy(thread->handle);
+}

apps/plugins/sdl/src/thread/dc/SDL_systhread_c.h

@@ -0,0 +1,24 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+typedef struct kthread* SYS_ThreadHandle;

apps/plugins/sdl/src/thread/generic/SDL_syscond.c

@@ -0,0 +1,215 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of condition variables using semaphores and mutexes */
+/*
+   This implementation borrows heavily from the BeOS condition variable
+   implementation, written by Christopher Tate and Owen Smith.  Thanks!
+ */
+
+#include "SDL_thread.h"
+
+struct SDL_cond
+{
+	SDL_mutex *lock;
+	int waiting;
+	int signals;
+	SDL_sem *wait_sem;
+	SDL_sem *wait_done;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		cond->lock = SDL_CreateMutex();
+		cond->wait_sem = SDL_CreateSemaphore(0);
+		cond->wait_done = SDL_CreateSemaphore(0);
+		cond->waiting = cond->signals = 0;
+		if ( ! cond->lock || ! cond->wait_sem || ! cond->wait_done ) {
+			SDL_DestroyCond(cond);
+			cond = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		if ( cond->wait_sem ) {
+			SDL_DestroySemaphore(cond->wait_sem);
+		}
+		if ( cond->wait_done ) {
+			SDL_DestroySemaphore(cond->wait_done);
+		}
+		if ( cond->lock ) {
+			SDL_DestroyMutex(cond->lock);
+		}
+		SDL_free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		++cond->signals;
+		SDL_SemPost(cond->wait_sem);
+		SDL_UnlockMutex(cond->lock);
+		SDL_SemWait(cond->wait_done);
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		int i, num_waiting;
+
+		num_waiting = (cond->waiting - cond->signals);
+		cond->signals = cond->waiting;
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemPost(cond->wait_sem);
+		}
+		/* Now all released threads are blocked here, waiting for us.
+		   Collect them all (and win fabulous prizes!) :-)
+		 */
+		SDL_UnlockMutex(cond->lock);
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemWait(cond->wait_done);
+		}
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Wait on the condition variable for at most 'ms' milliseconds.
+   The mutex must be locked before entering this function!
+   The mutex is unlocked during the wait, and locked again after the wait.
+
+Typical use:
+
+Thread A:
+	SDL_LockMutex(lock);
+	while ( ! condition ) {
+		SDL_CondWait(cond);
+	}
+	SDL_UnlockMutex(lock);
+
+Thread B:
+	SDL_LockMutex(lock);
+	...
+	condition = true;
+	...
+	SDL_UnlockMutex(lock);
+ */
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* Obtain the protection mutex, and increment the number of waiters.
+	   This allows the signal mechanism to only perform a signal if there
+	   are waiting threads.
+	 */
+	SDL_LockMutex(cond->lock);
+	++cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Unlock the mutex, as is required by condition variable semantics */
+	SDL_UnlockMutex(mutex);
+
+	/* Wait for a signal */
+	if ( ms == SDL_MUTEX_MAXWAIT ) {
+		retval = SDL_SemWait(cond->wait_sem);
+	} else {
+		retval = SDL_SemWaitTimeout(cond->wait_sem, ms);
+	}
+
+	/* Let the signaler know we have completed the wait, otherwise
+           the signaler can race ahead and get the condition semaphore
+           if we are stopped between the mutex unlock and semaphore wait,
+           giving a deadlock.  See the following URL for details:
+        http://www-classic.be.com/aboutbe/benewsletter/volume_III/Issue40.html
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->signals > 0 ) {
+		/* If we timed out, we need to eat a condition signal */
+		if ( retval > 0 ) {
+			SDL_SemWait(cond->wait_sem);
+		}
+		/* We always notify the signal thread that we are done */
+		SDL_SemPost(cond->wait_done);
+
+		/* Signal handshake complete */
+		--cond->signals;
+	}
+	--cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Lock the mutex, as is required by condition variable semantics */
+	SDL_LockMutex(mutex);
+
+	return retval;
+}
+
+/* Wait on the condition variable forever */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
+}

apps/plugins/sdl/src/thread/generic/SDL_sysmutex.c

@@ -0,0 +1,129 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of mutexes using semaphores */
+
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+struct SDL_mutex {
+	int recursive;
+	Uint32 owner;
+	SDL_sem *sem;
+};
+
+/* Create a mutex */
+SDL_mutex *SDL_CreateMutex(void)
+{
+	SDL_mutex *mutex;
+
+	/* Allocate mutex memory */
+	mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
+	if ( mutex ) {
+		/* Create the mutex semaphore, with initial value 1 */
+		mutex->sem = SDL_CreateSemaphore(1);
+		mutex->recursive = 0;
+		mutex->owner = 0;
+		if ( ! mutex->sem ) {
+			SDL_free(mutex);
+			mutex = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return mutex;
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) {
+		if ( mutex->sem ) {
+			SDL_DestroySemaphore(mutex->sem);
+		}
+		SDL_free(mutex);
+	}
+}
+
+/* Lock the semaphore */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+#if SDL_THREADS_DISABLED
+	return 0;
+#else
+	Uint32 this_thread;
+
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	this_thread = SDL_ThreadID();
+	if ( mutex->owner == this_thread ) {
+		++mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   We set the locking thread id after we obtain the lock
+		   so unlocks from other threads will fail.
+		*/
+		SDL_SemWait(mutex->sem);
+		mutex->owner = this_thread;
+		mutex->recursive = 0;
+	}
+
+	return 0;
+#endif /* SDL_THREADS_DISABLED */
+}
+
+/* Unlock the mutex */
+int SDL_mutexV(SDL_mutex *mutex)
+{
+#if SDL_THREADS_DISABLED
+	return 0;
+#else
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	/* If we don't own the mutex, we can't unlock it */
+	if ( SDL_ThreadID() != mutex->owner ) {
+		SDL_SetError("mutex not owned by this thread");
+		return -1;
+	}
+
+	if ( mutex->recursive ) {
+		--mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   First reset the owner so another thread doesn't lock
+		   the mutex and set the ownership before we reset it,
+		   then release the lock semaphore.
+		 */
+		mutex->owner = 0;
+		SDL_SemPost(mutex->sem);
+	}
+	return 0;
+#endif /* SDL_THREADS_DISABLED */
+}

apps/plugins/sdl/src/thread/generic/SDL_sysmutex_c.h

@@ -0,0 +1,23 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+

apps/plugins/sdl/src/thread/generic/SDL_syssem.c

@@ -0,0 +1,211 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of semaphores using mutexes and condition variables */
+
+#include "SDL_timer.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+#if SDL_THREADS_DISABLED
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return (SDL_sem *)0;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	return;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	return 0;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+#else
+
+struct SDL_semaphore
+{
+	Uint32 count;
+	Uint32 waiters_count;
+	SDL_mutex *count_lock;
+	SDL_cond *count_nonzero;
+};
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_sem *sem;
+
+	sem = (SDL_sem *)SDL_malloc(sizeof(*sem));
+	if ( ! sem ) {
+		SDL_OutOfMemory();
+		return NULL;
+	}
+	sem->count = initial_value;
+	sem->waiters_count = 0;
+
+	sem->count_lock = SDL_CreateMutex();
+	sem->count_nonzero = SDL_CreateCond();
+	if ( ! sem->count_lock || ! sem->count_nonzero ) {
+		SDL_DestroySemaphore(sem);
+		return NULL;
+	}
+
+	return sem;
+}
+
+/* WARNING:
+   You cannot call this function when another thread is using the semaphore.
+*/
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( sem ) {
+		sem->count = 0xFFFFFFFF;
+		while ( sem->waiters_count > 0) {
+			SDL_CondSignal(sem->count_nonzero);
+			SDL_Delay(10);
+		}
+		SDL_DestroyCond(sem->count_nonzero);
+		if ( sem->count_lock ) {
+			SDL_mutexP(sem->count_lock);
+			SDL_mutexV(sem->count_lock);
+			SDL_DestroyMutex(sem->count_lock);
+		}
+		SDL_free(sem);
+	}
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = SDL_MUTEX_TIMEDOUT;
+	SDL_LockMutex(sem->count_lock);
+	if ( sem->count > 0 ) {
+		--sem->count;
+		retval = 0;
+	}
+	SDL_UnlockMutex(sem->count_lock);
+
+	return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	/* A timeout of 0 is an easy case */
+	if ( timeout == 0 ) {
+		return SDL_SemTryWait(sem);
+	}
+
+	SDL_LockMutex(sem->count_lock);
+	++sem->waiters_count;
+	retval = 0;
+	while ( (sem->count == 0) && (retval != SDL_MUTEX_TIMEDOUT) ) {
+		retval = SDL_CondWaitTimeout(sem->count_nonzero,
+		                             sem->count_lock, timeout);
+	}
+	--sem->waiters_count;
+	if (retval == 0) {
+		--sem->count;
+	}
+	SDL_UnlockMutex(sem->count_lock);
+
+	return retval;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	Uint32 value;
+	
+	value = 0;
+	if ( sem ) {
+		SDL_LockMutex(sem->count_lock);
+		value = sem->count;
+		SDL_UnlockMutex(sem->count_lock);
+	}
+	return value;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	SDL_LockMutex(sem->count_lock);
+	if ( sem->waiters_count > 0 ) {
+		SDL_CondSignal(sem->count_nonzero);
+	}
+	++sem->count;
+	SDL_UnlockMutex(sem->count_lock);
+
+	return 0;
+}
+
+#endif /* SDL_THREADS_DISABLED */

apps/plugins/sdl/src/thread/generic/SDL_systhread.c

@@ -0,0 +1,54 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Thread management routines for SDL */
+
+#include "SDL_thread.h"
+#include "../SDL_systhread.h"
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	SDL_SetError("Threads are not supported on this platform");
+	return(-1);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return(0);
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	return;
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	return;
+}
+

apps/plugins/sdl/src/thread/generic/SDL_systhread_c.h

@@ -0,0 +1,25 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Stub until we implement threads on this platform */
+typedef int SYS_ThreadHandle;

apps/plugins/sdl/src/thread/irix/SDL_syssem.c

@@ -0,0 +1,219 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include "SDL_thread.h"
+#include "SDL_timer.h"
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <errno.h>
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+
+
+struct SDL_semaphore {
+	int id;
+};
+
+/* Not defined by many operating systems, use configure to detect */
+/*
+#if !defined(HAVE_SEMUN)
+union semun {
+	int val;
+	struct semid_ds *buf;
+	ushort *array;
+};
+#endif
+*/
+
+static struct sembuf op_trywait[2] = {
+	{ 0, -1, (IPC_NOWAIT|SEM_UNDO) } /* Decrement semaphore, no block */
+};
+static struct sembuf op_wait[2] = {
+	{ 0, -1, SEM_UNDO }		/* Decrement semaphore */
+};
+static struct sembuf op_post[1] = {
+	{ 0, 1, (IPC_NOWAIT|SEM_UNDO) }	/* Increment semaphore */
+};
+
+/* Create a blockable semaphore */
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	extern int _creating_thread_lock;	/* SDL_threads.c */
+	SDL_sem *sem;
+	union semun init;
+
+	sem = (SDL_sem *)SDL_malloc(sizeof(*sem));
+	if ( sem == NULL ) {
+		SDL_OutOfMemory();
+		return(NULL);
+	}
+	sem->id = semget(IPC_PRIVATE, 1, (0600|IPC_CREAT));
+	if ( sem->id < 0 ) {
+		SDL_SetError("Couldn't create semaphore");
+		SDL_free(sem);
+		return(NULL);
+	}
+	init.val = initial_value;	/* Initialize semaphore */
+	semctl(sem->id, 0, SETVAL, init);
+	return(sem);
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( sem ) {
+#ifdef __IRIX__
+		semctl(sem->id, 0, IPC_RMID);
+#else
+		union semun dummy;
+		dummy.val = 0;
+		semctl(sem->id, 0, IPC_RMID, dummy);
+#endif
+		SDL_free(sem);
+	}
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = 0;
+  tryagain:
+	if ( semop(sem->id, op_trywait, 1) < 0 ) {
+		if ( errno == EINTR ) {
+			goto tryagain;
+		}
+		retval = SDL_MUTEX_TIMEDOUT;
+	}
+	return retval;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = 0;
+  tryagain:
+	if ( semop(sem->id, op_wait, 1) < 0 ) {
+		if ( errno == EINTR ) {
+			goto tryagain;
+		}
+		SDL_SetError("Semaphore operation error");
+		retval = -1;
+	}
+	return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	/* Try the easy cases first */
+	if ( timeout == 0 ) {
+		return SDL_SemTryWait(sem);
+	}
+	if ( timeout == SDL_MUTEX_MAXWAIT ) {
+		return SDL_SemWait(sem);
+	}
+
+	/* Ack!  We have to busy wait... */
+	timeout += SDL_GetTicks();
+	do {
+		retval = SDL_SemTryWait(sem);
+		if ( retval == 0 ) {
+			break;
+		}
+		SDL_Delay(1);
+	} while ( SDL_GetTicks() < timeout );
+
+	return retval;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	int semval;
+	Uint32 value;
+	
+	value = 0;
+	if ( sem ) {
+	  tryagain:
+#ifdef __IRIX__
+		semval = semctl(sem->id, 0, GETVAL);
+#else
+		{
+		union semun arg;
+		arg.val = 0;
+		semval = semctl(sem->id, 0, GETVAL, arg);
+		}
+#endif
+		if ( semval < 0 ) {
+			if ( errno == EINTR ) {
+				goto tryagain;
+			}
+		} else {
+			value = (Uint32)semval;
+		}
+	}
+	return value;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = 0;
+  tryagain:
+	if ( semop(sem->id, op_post, 1) < 0 ) {
+		if ( errno == EINTR ) {
+			goto tryagain;
+		}
+		SDL_SetError("Semaphore operation error");
+		retval = -1;
+	}
+	return retval;
+}

apps/plugins/sdl/src/thread/irix/SDL_systhread.c

@@ -0,0 +1,85 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* IRIX thread management routines for SDL */
+
+#include <errno.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/prctl.h>
+
+#include "SDL_thread.h"
+#include "../SDL_systhread.h"
+
+
+static int sig_list[] = {
+	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCLD, SIGWINCH,
+	SIGVTALRM, SIGPROF, 0
+};
+
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	/* Create the thread and go! */
+	if ( sproc(SDL_RunThread, PR_SALL, args) < 0 ) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	int i;
+	sigset_t mask;
+
+	/* Mask asynchronous signals for this thread */
+	sigemptyset(&mask);
+	for ( i=0; sig_list[i]; ++i ) {
+		sigaddset(&mask, sig_list[i]);
+	}
+	sigprocmask(SIG_BLOCK, &mask, NULL);
+}
+
+/* WARNING:  This may not work for systems with 64-bit pid_t */
+Uint32 SDL_ThreadID(void)
+{
+	return((Uint32)getpid());
+}
+
+/* WARNING:  This may not work for systems with 64-bit pid_t */
+void SDL_WaitThread(SDL_Thread *thread, int *status)
+{
+	errno = 0;
+	while ( errno != ECHILD ) {
+		waitpid(thread->handle, NULL, 0);
+	}
+}
+
+/* WARNING:  This may not work for systems with 64-bit pid_t */
+void SDL_KillThread(SDL_Thread *thread)
+{
+	kill(thread->handle, SIGKILL);
+}
+

apps/plugins/sdl/src/thread/irix/SDL_systhread_c.h

@@ -0,0 +1,27 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include <sys/types.h>
+
+typedef pid_t SYS_ThreadHandle;
+

apps/plugins/sdl/src/thread/os2/SDL_syscond.c

@@ -0,0 +1,215 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of condition variables using semaphores and mutexes */
+/*
+   This implementation borrows heavily from the BeOS condition variable
+   implementation, written by Christopher Tate and Owen Smith.  Thanks!
+ */
+
+#include "SDL_thread.h"
+
+struct SDL_cond
+{
+	SDL_mutex *lock;
+	int waiting;
+	int signals;
+	SDL_sem *wait_sem;
+	SDL_sem *wait_done;
+};
+
+/* Create a condition variable */
+DECLSPEC SDL_cond * SDLCALL SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		cond->lock = SDL_CreateMutex();
+		cond->wait_sem = SDL_CreateSemaphore(0);
+		cond->wait_done = SDL_CreateSemaphore(0);
+		cond->waiting = cond->signals = 0;
+		if ( ! cond->lock || ! cond->wait_sem || ! cond->wait_done ) {
+			SDL_DestroyCond(cond);
+			cond = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+DECLSPEC void SDLCALL SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		if ( cond->wait_sem ) {
+			SDL_DestroySemaphore(cond->wait_sem);
+		}
+		if ( cond->wait_done ) {
+			SDL_DestroySemaphore(cond->wait_done);
+		}
+		if ( cond->lock ) {
+			SDL_DestroyMutex(cond->lock);
+		}
+		SDL_free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+DECLSPEC int SDLCALL SDL_CondSignal(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		++cond->signals;
+		SDL_SemPost(cond->wait_sem);
+		SDL_UnlockMutex(cond->lock);
+		SDL_SemWait(cond->wait_done);
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+DECLSPEC int SDLCALL SDL_CondBroadcast(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		int i, num_waiting;
+
+		num_waiting = (cond->waiting - cond->signals);
+		cond->signals = cond->waiting;
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemPost(cond->wait_sem);
+		}
+		/* Now all released threads are blocked here, waiting for us.
+		   Collect them all (and win fabulous prizes!) :-)
+		 */
+		SDL_UnlockMutex(cond->lock);
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemWait(cond->wait_done);
+		}
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Wait on the condition variable for at most 'ms' milliseconds.
+   The mutex must be locked before entering this function!
+   The mutex is unlocked during the wait, and locked again after the wait.
+
+Typical use:
+
+Thread A:
+	SDL_LockMutex(lock);
+	while ( ! condition ) {
+		SDL_CondWait(cond);
+	}
+	SDL_UnlockMutex(lock);
+
+Thread B:
+	SDL_LockMutex(lock);
+	...
+	condition = true;
+	...
+	SDL_UnlockMutex(lock);
+ */
+DECLSPEC int SDLCALL SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* Obtain the protection mutex, and increment the number of waiters.
+	   This allows the signal mechanism to only perform a signal if there
+	   are waiting threads.
+	 */
+	SDL_LockMutex(cond->lock);
+	++cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Unlock the mutex, as is required by condition variable semantics */
+	SDL_UnlockMutex(mutex);
+
+	/* Wait for a signal */
+	if ( ms == SDL_MUTEX_MAXWAIT ) {
+		retval = SDL_SemWait(cond->wait_sem);
+	} else {
+		retval = SDL_SemWaitTimeout(cond->wait_sem, ms);
+	}
+
+	/* Let the signaler know we have completed the wait, otherwise
+           the signaler can race ahead and get the condition semaphore
+           if we are stopped between the mutex unlock and semaphore wait,
+           giving a deadlock.  See the following URL for details:
+        http://www-classic.be.com/aboutbe/benewsletter/volume_III/Issue40.html
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->signals > 0 ) {
+		/* If we timed out, we need to eat a condition signal */
+		if ( retval > 0 ) {
+			SDL_SemWait(cond->wait_sem);
+		}
+		/* We always notify the signal thread that we are done */
+		SDL_SemPost(cond->wait_done);
+
+		/* Signal handshake complete */
+		--cond->signals;
+	}
+	--cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Lock the mutex, as is required by condition variable semantics */
+	SDL_LockMutex(mutex);
+
+	return retval;
+}
+
+/* Wait on the condition variable forever */
+DECLSPEC int SDLCALL SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
+}

apps/plugins/sdl/src/thread/os2/SDL_syscond_c.h

@@ -0,0 +1,23 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+

apps/plugins/sdl/src/thread/os2/SDL_sysmutex.c

@@ -0,0 +1,108 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Mutex functions using the OS/2 API */
+
+#define INCL_DOSERRORS
+#define INCL_DOSSEMAPHORES
+#include <os2.h>
+
+#include "SDL_mutex.h"
+
+
+struct SDL_mutex {
+	HMTX hmtxID;
+};
+
+/* Create a mutex */
+DECLSPEC SDL_mutex * SDLCALL SDL_CreateMutex(void)
+{
+  SDL_mutex *mutex;
+  APIRET ulrc;
+
+  /* Allocate mutex memory */
+  mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
+  if (mutex)
+  {
+    /* Create the mutex, with initial value signaled */
+    ulrc = DosCreateMutexSem(NULL,                  // Create unnamed semaphore
+                             &(mutex->hmtxID),      // Pointer to handle
+                             0L,                    // Flags: create it private (not shared)
+                             FALSE);                // Initial value: unowned
+    if (ulrc!=NO_ERROR)
+    {
+      SDL_SetError("Couldn't create mutex");
+      SDL_free(mutex);
+      mutex = NULL;
+    }
+  } else {
+    SDL_OutOfMemory();
+  }
+  return(mutex);
+}
+
+/* Free the mutex */
+DECLSPEC void SDLCALL SDL_DestroyMutex(SDL_mutex *mutex)
+{
+  if ( mutex )
+  {
+    if ( mutex->hmtxID )
+    {
+      DosCloseMutexSem(mutex->hmtxID);
+      mutex->hmtxID = 0;
+    }
+    SDL_free(mutex);
+  }
+}
+
+/* Lock the mutex */
+DECLSPEC int SDLCALL SDL_mutexP(SDL_mutex *mutex)
+{
+  if ( mutex == NULL )
+  {
+    SDL_SetError("Passed a NULL mutex");
+    return -1;
+  }
+  if ( DosRequestMutexSem(mutex->hmtxID, SEM_INDEFINITE_WAIT) != NO_ERROR )
+  {
+    SDL_SetError("Couldn't wait on mutex");
+    return -1;
+  }
+  return(0);
+}
+
+/* Unlock the mutex */
+DECLSPEC int SDLCALL SDL_mutexV(SDL_mutex *mutex)
+{
+  if ( mutex == NULL )
+  {
+    SDL_SetError("Passed a NULL mutex");
+    return -1;
+  }
+  if ( DosReleaseMutexSem(mutex->hmtxID) != NO_ERROR )
+  {
+    SDL_SetError("Couldn't release mutex");
+    return -1;
+  }
+  return(0);
+}

apps/plugins/sdl/src/thread/os2/SDL_syssem.c

@@ -0,0 +1,192 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Semaphore functions using the OS/2 API */
+
+#define INCL_DOS
+#define INCL_DOSERRORS
+#define INCL_DOSSEMAPHORES
+#include <os2.h>
+
+#include "SDL_thread.h"
+#include "SDL_timer.h"
+
+
+struct SDL_semaphore {
+        HMTX id;
+        HEV  changed;
+        Uint32 value;
+};
+
+
+/* Create a semaphore */
+DECLSPEC SDL_sem * SDLCALL SDL_CreateSemaphore(Uint32 initial_value)
+{
+        SDL_sem *sem;
+        ULONG ulrc;
+
+        /* Allocate sem memory */
+        sem = (SDL_sem *)SDL_malloc(sizeof(*sem));
+        if ( sem ) {
+                /* Create the mutex semaphore */
+                ulrc = DosCreateMutexSem(NULL,&(sem->id),0,TRUE);
+                if ( ulrc ) {
+                        SDL_SetError("Couldn't create semaphore");
+                        SDL_free(sem);
+                        sem = NULL;
+                } else
+                {
+                    DosCreateEventSem(NULL, &(sem->changed), 0, FALSE);
+                    sem->value = initial_value;
+                    DosReleaseMutexSem(sem->id);
+                }
+        } else {
+                SDL_OutOfMemory();
+        }
+        return(sem);
+}
+
+/* Free the semaphore */
+DECLSPEC void SDLCALL SDL_DestroySemaphore(SDL_sem *sem)
+{
+        if ( sem ) {
+                if ( sem->id ) {
+                        DosCloseEventSem(sem->changed);
+                        DosCloseMutexSem(sem->id);
+                        sem->id = 0;
+                }
+                SDL_free(sem);
+        }
+}
+
+DECLSPEC int SDLCALL SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+        ULONG ulrc;
+
+        if ( ! sem ) {
+                SDL_SetError("Passed a NULL sem");
+                return -1;
+        }
+
+        if ( timeout == SDL_MUTEX_MAXWAIT ) {
+           while (1) {
+              ulrc = DosRequestMutexSem(sem->id, SEM_INDEFINITE_WAIT);
+              if (ulrc) {
+                 /* if error waiting mutex */
+                 SDL_SetError("DosRequestMutexSem() failed");
+                 return -1;
+              } else if (sem->value) {
+                        sem->value--;
+                        DosReleaseMutexSem(sem->id);
+                        return 0;
+                     } else {
+                        ULONG ulPostCount;
+                        DosResetEventSem(sem->changed, &ulPostCount);
+                        DosReleaseMutexSem(sem->id);
+                        /* continue waiting until somebody posts the semaphore */
+                        DosWaitEventSem(sem->changed, SEM_INDEFINITE_WAIT);
+                     }
+           }
+        } else
+        if ( timeout == 0 )
+        {
+            ulrc = DosRequestMutexSem(sem->id, SEM_INDEFINITE_WAIT);
+            if (ulrc==NO_ERROR)
+            {
+                if (sem->value)
+                {
+                    sem->value--;
+                    DosReleaseMutexSem(sem->id);
+                    return 0;
+                } else
+                {
+                    DosReleaseMutexSem(sem->id);
+                    return SDL_MUTEX_TIMEDOUT;
+                }
+            } else
+            {
+                SDL_SetError("DosRequestMutexSem() failed");
+                return -1;
+            }
+        } else {
+            ulrc = DosRequestMutexSem(sem->id, SEM_INDEFINITE_WAIT);
+            if (ulrc) {
+               /* if error waiting mutex */
+               SDL_SetError("DosRequestMutexSem() failed");
+               return -1;
+            } else
+              if (sem->value) {
+                sem->value--;
+                DosReleaseMutexSem(sem->id);
+                return 0;
+              } else {
+                ULONG ulPostCount;
+                DosResetEventSem(sem->changed, &ulPostCount);
+                DosReleaseMutexSem(sem->id);
+                /* continue waiting until somebody posts the semaphore */
+                ulrc = DosWaitEventSem(sem->changed, timeout);
+                if (ulrc==NO_ERROR)
+                  return 0;
+                else
+                  return SDL_MUTEX_TIMEDOUT;
+              }
+        }
+        /* never reached */
+        return -1;
+}
+
+DECLSPEC int SDLCALL SDL_SemTryWait(SDL_sem *sem)
+{
+        return SDL_SemWaitTimeout(sem, 0);
+}
+
+DECLSPEC int SDLCALL SDL_SemWait(SDL_sem *sem)
+{
+        return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+/* Returns the current count of the semaphore */
+DECLSPEC Uint32 SDLCALL SDL_SemValue(SDL_sem *sem)
+{
+        if ( ! sem ) {
+                SDL_SetError("Passed a NULL sem");
+                return 0;
+        }
+        return sem->value;
+}
+
+DECLSPEC int SDLCALL SDL_SemPost(SDL_sem *sem)
+{
+        if ( ! sem ) {
+                SDL_SetError("Passed a NULL sem");
+                return -1;
+        }
+        if ( DosRequestMutexSem(sem->id,SEM_INDEFINITE_WAIT) ) {
+                SDL_SetError("DosRequestMutexSem() failed");
+                return -1;
+        }
+        sem->value++;
+        DosPostEventSem(sem->changed);
+        DosReleaseMutexSem(sem->id);
+        return 0;
+}

apps/plugins/sdl/src/thread/os2/SDL_systhread.c

@@ -0,0 +1,108 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* OS/2 thread management routines for SDL */
+
+#include <process.h>
+#define INCL_DOSERRORS
+#define INCL_DOSPROCESS
+#include <os2.h>
+
+#include "SDL_thread.h"
+#include "../SDL_systhread.h"
+#include "../SDL_thread_c.h"
+
+typedef struct ThreadStartParms
+{
+  void *args;
+  pfnSDL_CurrentEndThread pfnCurrentEndThread;
+} tThreadStartParms, *pThreadStartParms;
+
+static void threadfunc(void *pparm)
+{
+  pThreadStartParms pThreadParms = pparm;
+  pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
+
+  // Call the thread function!
+  SDL_RunThread(pThreadParms->args);
+
+  // Get the current endthread we have to use!
+  if (pThreadParms)
+  {
+    pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
+    SDL_free(pThreadParms);
+  }
+  // Call endthread!
+  if (pfnCurrentEndThread)
+    (*pfnCurrentEndThread)();
+}
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
+{
+  pThreadStartParms pThreadParms = SDL_malloc(sizeof(tThreadStartParms));
+  if (!pThreadParms)
+  {
+    SDL_SetError("Not enough memory to create thread");
+    return(-1);
+  }
+
+  // Save the function which we will have to call to clear the RTL of calling app!
+  pThreadParms->pfnCurrentEndThread = pfnEndThread;
+  // Also save the real parameters we have to pass to thread function
+  pThreadParms->args = args;
+  // Start the thread using the runtime library of calling app!
+  thread->threadid = thread->handle = (*pfnBeginThread)(threadfunc, NULL, 512*1024, pThreadParms);
+  if ((int)thread->threadid <= 0)
+  {
+    SDL_SetError("Not enough resources to create thread");
+    return(-1);
+  }
+  return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+  return;
+}
+
+DECLSPEC Uint32 SDLCALL SDL_ThreadID(void)
+{
+  PTIB tib;
+  DosGetInfoBlocks(&tib, NULL);
+  return((Uint32) (tib->tib_ptib2->tib2_ultid));
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+  TID tid = thread->handle;
+  DosWaitThread(&tid, DCWW_WAIT);
+}
+
+/* WARNING: This function is really a last resort.
+ * Threads should be signaled and then exit by themselves.
+ * TerminateThread() doesn't perform stack and DLL cleanup.
+ */
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+  DosKillThread(thread->handle);
+}

apps/plugins/sdl/src/thread/os2/SDL_systhread_c.h

@@ -0,0 +1,28 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#define INCL_DOSPROCESS
+#include <os2.h>
+
+typedef TID SYS_ThreadHandle;
+

apps/plugins/sdl/src/thread/pth/SDL_syscond.c

@@ -0,0 +1,164 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/*
+ *	GNU pth conditions variables
+ *
+ *	Patrice Mandin
+ */
+
+#include <pth.h>
+
+#include "SDL_thread.h"
+#include "SDL_sysmutex_c.h"
+
+struct SDL_cond
+{
+	pth_cond_t	condpth_p;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		if ( pth_cond_init(&(cond->condpth_p)) < 0 ) {
+			SDL_SetError("pthread_cond_init() failed");
+			SDL_free(cond);
+			cond = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		SDL_free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pth_cond_notify(&(cond->condpth_p), FALSE) != 0 ) {
+		SDL_SetError("pth_cond_notify() failed");
+		retval = -1;
+	}
+	return retval;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pth_cond_notify(&(cond->condpth_p), TRUE) != 0 ) {
+		SDL_SetError("pth_cond_notify() failed");
+		retval = -1;
+	}
+	return retval;
+}
+
+/* Wait on the condition variable for at most 'ms' milliseconds.
+   The mutex must be locked before entering this function!
+   The mutex is unlocked during the wait, and locked again after the wait.
+
+Typical use:
+
+Thread A:
+	SDL_LockMutex(lock);
+	while ( ! condition ) {
+		SDL_CondWait(cond);
+	}
+	SDL_UnlockMutex(lock);
+
+Thread B:
+	SDL_LockMutex(lock);
+	...
+	condition = true;
+	...
+	SDL_UnlockMutex(lock);
+ */
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+	pth_event_t ev;
+	int sec;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+
+	sec = ms/1000;
+	ev = pth_event(PTH_EVENT_TIME, pth_timeout(sec,(ms-sec*1000)*1000));
+
+	if ( pth_cond_await(&(cond->condpth_p), &(mutex->mutexpth_p), ev) != 0 ) {
+		SDL_SetError("pth_cond_await() failed");
+		retval = -1;
+	}
+
+    pth_event_free(ev, PTH_FREE_ALL);
+
+	return retval;
+}
+
+/* Wait on the condition variable forever */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pth_cond_await(&(cond->condpth_p), &(mutex->mutexpth_p), NULL) != 0 ) {
+		SDL_SetError("pth_cond_await() failed");
+		retval = -1;
+	}
+	return retval;
+}

apps/plugins/sdl/src/thread/pth/SDL_sysmutex.c

@@ -0,0 +1,87 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/*
+ *	GNU pth mutexes
+ *
+ *	Patrice Mandin
+ */
+
+#include <pth.h>
+
+#include "SDL_mutex.h"
+#include "SDL_sysmutex_c.h"
+
+/* Create a mutex */
+SDL_mutex *SDL_CreateMutex(void)
+{
+	SDL_mutex *mutex;
+
+	/* Allocate mutex memory */
+	mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
+	if ( mutex ) {
+		/* Create the mutex, with initial value signaled */
+	    if (!pth_mutex_init(&(mutex->mutexpth_p))) {
+			SDL_SetError("Couldn't create mutex");
+			SDL_free(mutex);
+			mutex = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(mutex);
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) {
+		SDL_free(mutex);
+	}
+}
+
+/* Lock the mutex */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	pth_mutex_acquire(&(mutex->mutexpth_p), FALSE, NULL);
+
+	return(0);
+}
+
+/* Unlock the mutex */
+int SDL_mutexV(SDL_mutex *mutex)
+{
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+    pth_mutex_release(&(mutex->mutexpth_p));
+
+	return(0);
+}

apps/plugins/sdl/src/thread/pth/SDL_sysmutex_c.h

@@ -0,0 +1,31 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_SYSMUTEX_C_H_
+#define _SDL_SYSMUTEX_C_H_
+
+struct SDL_mutex {
+	pth_mutex_t mutexpth_p;
+};
+
+#endif /* _SDL_SYSMUTEX_C_H_ */

apps/plugins/sdl/src/thread/pth/SDL_systhread.c

@@ -0,0 +1,103 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/*
+ *	GNU pth threads
+ *
+ *	Patrice Mandin
+ */
+
+#include <pth.h>
+#include <signal.h>
+
+#include "SDL_thread.h"
+#include "../SDL_thread_c.h"
+#include "../SDL_systhread.h"
+
+/* List of signals to mask in the subthreads */
+static int sig_list[] = {
+	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
+	SIGVTALRM, SIGPROF, 0
+};
+
+static void *RunThread(void *data)
+{
+	SDL_RunThread(data);
+	pth_exit((void*)0);
+	return((void *)0);		/* Prevent compiler warning */
+}
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	pth_attr_t type;
+
+	/* Create a new attribute */
+	type = pth_attr_new();
+	if ( type == NULL ) {
+		SDL_SetError("Couldn't initialize pth attributes");
+		return(-1);
+	}
+	pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE);
+
+	/* Create the thread and go! */
+	thread->handle = pth_spawn(type, RunThread, args);
+	if ( thread->handle == NULL ) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	int i;
+	sigset_t mask;
+	int oldstate;
+
+	/* Mask asynchronous signals for this thread */
+	sigemptyset(&mask);
+	for ( i=0; sig_list[i]; ++i ) {
+		sigaddset(&mask, sig_list[i]);
+	}
+	pth_sigmask(SIG_BLOCK, &mask, 0);
+
+	/* Allow ourselves to be asynchronously cancelled */
+	pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate);
+}
+
+/* WARNING:  This may not work for systems with 64-bit pid_t */
+Uint32 SDL_ThreadID(void)
+{
+	return((Uint32)pth_self());
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	pth_join(thread->handle, NULL);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	pth_cancel(thread->handle);
+	pth_join(thread->handle, NULL);
+}

apps/plugins/sdl/src/thread/pth/SDL_systhread_c.h

@@ -0,0 +1,31 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_SYSTHREAD_C_H_
+#define _SDL_SYSTHREAD_C_H_
+
+#include <pth.h>
+
+typedef pth_t SYS_ThreadHandle;
+
+#endif /* _SDL_SYSTHREAD_C_H_ */

apps/plugins/sdl/src/thread/pthread/SDL_syscond.c

@@ -0,0 +1,155 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include <sys/time.h>
+#include <unistd.h>
+#include <errno.h>
+#include <pthread.h>
+
+#include "SDL_thread.h"
+#include "SDL_sysmutex_c.h"
+
+struct SDL_cond
+{
+	pthread_cond_t cond;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		if ( pthread_cond_init(&cond->cond, NULL) < 0 ) {
+			SDL_SetError("pthread_cond_init() failed");
+			SDL_free(cond);
+			cond = NULL;
+		}
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		pthread_cond_destroy(&cond->cond);
+		SDL_free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pthread_cond_signal(&cond->cond) != 0 ) {
+		SDL_SetError("pthread_cond_signal() failed");
+		retval = -1;
+	}
+	return retval;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pthread_cond_broadcast(&cond->cond) != 0 ) {
+		SDL_SetError("pthread_cond_broadcast() failed");
+		retval = -1;
+	}
+	return retval;
+}
+
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+	struct timeval delta;
+	struct timespec abstime;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	gettimeofday(&delta, NULL);
+
+	abstime.tv_sec = delta.tv_sec + (ms/1000);
+	abstime.tv_nsec = (delta.tv_usec + (ms%1000) * 1000) * 1000;
+        if ( abstime.tv_nsec > 1000000000 ) {
+          abstime.tv_sec += 1;
+          abstime.tv_nsec -= 1000000000;
+        }
+
+  tryagain:
+	retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime);
+	switch (retval) {
+	    case EINTR:
+		goto tryagain;
+		break;
+	    case ETIMEDOUT:
+		retval = SDL_MUTEX_TIMEDOUT;
+		break;
+	    case 0:
+		break;
+	    default:
+		SDL_SetError("pthread_cond_timedwait() failed");
+		retval = -1;
+		break;
+	}
+	return retval;
+}
+
+/* Wait on the condition variable, unlocking the provided mutex.
+   The mutex must be locked before entering this function!
+ */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pthread_cond_wait(&cond->cond, &mutex->id) != 0 ) {
+		SDL_SetError("pthread_cond_wait() failed");
+		retval = -1;
+	}
+	return retval;
+}

apps/plugins/sdl/src/thread/pthread/SDL_sysmutex.c

@@ -0,0 +1,153 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include <pthread.h>
+
+#include "SDL_thread.h"
+
+#if !SDL_THREAD_PTHREAD_RECURSIVE_MUTEX && \
+    !SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP
+#define FAKE_RECURSIVE_MUTEX
+#endif
+
+struct SDL_mutex {
+	pthread_mutex_t id;
+#if FAKE_RECURSIVE_MUTEX
+	int recursive;
+	pthread_t owner;
+#endif
+};
+
+SDL_mutex *SDL_CreateMutex (void)
+{
+	SDL_mutex *mutex;
+	pthread_mutexattr_t attr;
+
+	/* Allocate the structure */
+	mutex = (SDL_mutex *)SDL_calloc(1, sizeof(*mutex));
+	if ( mutex ) {
+		pthread_mutexattr_init(&attr);
+#if SDL_THREAD_PTHREAD_RECURSIVE_MUTEX
+		pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+#elif SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP
+		pthread_mutexattr_setkind_np(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
+#else
+		/* No extra attributes necessary */
+#endif
+		if ( pthread_mutex_init(&mutex->id, &attr) != 0 ) {
+			SDL_SetError("pthread_mutex_init() failed");
+			SDL_free(mutex);
+			mutex = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(mutex);
+}
+
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) {
+		pthread_mutex_destroy(&mutex->id);
+		SDL_free(mutex);
+	}
+}
+
+/* Lock the mutex */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+	int retval;
+#if FAKE_RECURSIVE_MUTEX
+	pthread_t this_thread;
+#endif
+
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	retval = 0;
+#if FAKE_RECURSIVE_MUTEX
+	this_thread = pthread_self();
+	if ( mutex->owner == this_thread ) {
+		++mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   We set the locking thread id after we obtain the lock
+		   so unlocks from other threads will fail.
+		*/
+		if ( pthread_mutex_lock(&mutex->id) == 0 ) {
+			mutex->owner = this_thread;
+			mutex->recursive = 0;
+		} else {
+			SDL_SetError("pthread_mutex_lock() failed");
+			retval = -1;
+		}
+	}
+#else
+	if ( pthread_mutex_lock(&mutex->id) < 0 ) {
+		SDL_SetError("pthread_mutex_lock() failed");
+		retval = -1;
+	}
+#endif
+	return retval;
+}
+
+int SDL_mutexV(SDL_mutex *mutex)
+{
+	int retval;
+
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	retval = 0;
+#if FAKE_RECURSIVE_MUTEX
+	/* We can only unlock the mutex if we own it */
+	if ( pthread_self() == mutex->owner ) {
+		if ( mutex->recursive ) {
+			--mutex->recursive;
+		} else {
+			/* The order of operations is important.
+			   First reset the owner so another thread doesn't lock
+			   the mutex and set the ownership before we reset it,
+			   then release the lock semaphore.
+			 */
+			mutex->owner = 0;
+			pthread_mutex_unlock(&mutex->id);
+		}
+	} else {
+		SDL_SetError("mutex not owned by this thread");
+		retval = -1;
+	}
+
+#else
+	if ( pthread_mutex_unlock(&mutex->id) < 0 ) {
+		SDL_SetError("pthread_mutex_unlock() failed");
+		retval = -1;
+	}
+#endif /* FAKE_RECURSIVE_MUTEX */
+
+	return retval;
+}

apps/plugins/sdl/src/thread/pthread/SDL_sysmutex_c.h

@@ -0,0 +1,31 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_mutex_c_h
+#define _SDL_mutex_c_h
+
+struct SDL_mutex {
+	pthread_mutex_t id;
+};
+
+#endif /* _SDL_mutex_c_h */

apps/plugins/sdl/src/thread/pthread/SDL_syssem.c

@@ -0,0 +1,190 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include <pthread.h>
+#include <semaphore.h>
+#include <errno.h>
+#include <sys/time.h>
+
+#include "SDL_thread.h"
+#include "SDL_timer.h"
+
+/* Wrapper around POSIX 1003.1b semaphores */
+
+#ifdef __MACOSX__
+/* Mac OS X doesn't support sem_getvalue() as of version 10.4 */
+#include "../generic/SDL_syssem.c"
+#else
+
+struct SDL_semaphore {
+	sem_t sem;
+};
+
+/* Create a semaphore, initialized with value */
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_sem *sem = (SDL_sem *) SDL_malloc(sizeof(SDL_sem));
+	if ( sem ) {
+		if ( sem_init(&sem->sem, 0, initial_value) < 0 ) {
+			SDL_SetError("sem_init() failed");
+			SDL_free(sem);
+			sem = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return sem;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( sem ) {
+		sem_destroy(&sem->sem);
+		SDL_free(sem);
+	}
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+	retval = SDL_MUTEX_TIMEDOUT;
+	if ( sem_trywait(&sem->sem) == 0 ) {
+		retval = 0;
+	}
+	return retval;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	while ( ((retval = sem_wait(&sem->sem)) == -1) && (errno == EINTR) ) {}
+	if ( retval < 0 ) {
+		SDL_SetError("sem_wait() failed");
+	}
+	return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int retval;
+#ifdef HAVE_SEM_TIMEDWAIT
+	struct timeval now;
+	struct timespec ts_timeout;
+#else
+	Uint32 end;
+#endif
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	/* Try the easy cases first */
+	if ( timeout == 0 ) {
+		return SDL_SemTryWait(sem);
+	}
+	if ( timeout == SDL_MUTEX_MAXWAIT ) {
+		return SDL_SemWait(sem);
+	}
+
+#ifdef HAVE_SEM_TIMEDWAIT
+	/* Setup the timeout. sem_timedwait doesn't wait for
+	 * a lapse of time, but until we reach a certain time.
+	 * This time is now plus the timeout.
+	 */
+	gettimeofday(&now, NULL);
+
+	/* Add our timeout to current time */
+	now.tv_usec += (timeout % 1000) * 1000;
+	now.tv_sec += timeout / 1000;
+
+	/* Wrap the second if needed */
+	if ( now.tv_usec >= 1000000 ) {
+		now.tv_usec -= 1000000;
+		now.tv_sec ++;
+	}
+
+	/* Convert to timespec */
+	ts_timeout.tv_sec = now.tv_sec;
+	ts_timeout.tv_nsec = now.tv_usec * 1000;
+
+	/* Wait. */
+	do
+		retval = sem_timedwait(&sem->sem, &ts_timeout);
+	while (retval == -1 && errno == EINTR);
+
+	if (retval == -1)
+		SDL_SetError(strerror(errno));
+#else
+	end = SDL_GetTicks() + timeout;
+	while ((retval = SDL_SemTryWait(sem)) == SDL_MUTEX_TIMEDOUT) {
+		if ((SDL_GetTicks() - end) >= 0) {
+			break;
+		}
+		SDL_Delay(0);
+	}
+#endif /* HAVE_SEM_TIMEDWAIT */
+
+	return retval;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	int ret = 0;
+	if ( sem ) {
+		sem_getvalue(&sem->sem, &ret);
+		if ( ret < 0 ) {
+			ret = 0;
+		}
+	}
+	return (Uint32)ret;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = sem_post(&sem->sem);
+	if ( retval < 0 ) {
+		SDL_SetError("sem_post() failed");
+	}
+	return retval;
+}
+
+#endif /* __MACOSX__ */

apps/plugins/sdl/src/thread/pthread/SDL_systhread.c

@@ -0,0 +1,120 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include <pthread.h>
+#include <signal.h>
+
+#include "SDL_thread.h"
+#include "../SDL_thread_c.h"
+#include "../SDL_systhread.h"
+
+/* List of signals to mask in the subthreads */
+static int sig_list[] = {
+	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
+	SIGVTALRM, SIGPROF, 0
+};
+
+#ifdef __RISCOS__
+/* RISC OS needs to know the main thread for
+ * it's timer and event processing. */
+int riscos_using_threads = 0;
+Uint32 riscos_main_thread = 0; /* Thread running events */
+#endif
+ 
+
+static void *RunThread(void *data)
+{
+	SDL_RunThread(data);
+	pthread_exit((void*)0);
+	return((void *)0);		/* Prevent compiler warning */
+}
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	pthread_attr_t type;
+
+	/* Set the thread attributes */
+	if ( pthread_attr_init(&type) != 0 ) {
+		SDL_SetError("Couldn't initialize pthread attributes");
+		return(-1);
+	}
+	pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
+
+	/* Create the thread and go! */
+	if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+
+#ifdef __RISCOS__
+	if (riscos_using_threads == 0) {
+		riscos_using_threads = 1;
+		riscos_main_thread = SDL_ThreadID();
+	}
+#endif
+
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	int i;
+	sigset_t mask;
+
+	/* Mask asynchronous signals for this thread */
+	sigemptyset(&mask);
+	for ( i=0; sig_list[i]; ++i ) {
+		sigaddset(&mask, sig_list[i]);
+	}
+	pthread_sigmask(SIG_BLOCK, &mask, 0);
+
+#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
+	/* Allow ourselves to be asynchronously cancelled */
+	{ int oldstate;
+		pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
+	}
+#endif
+}
+
+/* WARNING:  This may not work for systems with 64-bit pid_t */
+Uint32 SDL_ThreadID(void)
+{
+	return((Uint32)((size_t)pthread_self()));
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	pthread_join(thread->handle, 0);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
+	pthread_cancel(thread->handle);
+#else
+#ifdef __FREEBSD__
+#warning For some reason, this doesnt actually kill a thread - FreeBSD 3.2
+#endif
+	pthread_kill(thread->handle, SIGKILL);
+#endif
+}

apps/plugins/sdl/src/thread/pthread/SDL_systhread_c.h

@@ -0,0 +1,26 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include <pthread.h>
+
+typedef pthread_t SYS_ThreadHandle;

apps/plugins/sdl/src/thread/riscos/SDL_syscond.c

@@ -0,0 +1,160 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* RISC OS implementations uses pthreads based on linux code */
+
+#if SDL_THREADS_DISABLED
+#include "../generic/SDL_syscond.c"
+#else
+#include <sys/time.h>
+#include <unistd.h>
+#include <pthread.h>
+
+#include "SDL_thread.h"
+#include "SDL_sysmutex_c.h"
+
+struct SDL_cond
+{
+	pthread_cond_t cond;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		if ( pthread_cond_init(&cond->cond, NULL) < 0 ) {
+			SDL_SetError("pthread_cond_init() failed");
+			SDL_free(cond);
+			cond = NULL;
+		}
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		pthread_cond_destroy(&cond->cond);
+		SDL_free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pthread_cond_signal(&cond->cond) != 0 ) {
+		SDL_SetError("pthread_cond_signal() failed");
+		retval = -1;
+	}
+	return retval;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pthread_cond_broadcast(&cond->cond) != 0 ) {
+		SDL_SetError("pthread_cond_broadcast() failed");
+		retval = -1;
+	}
+	return retval;
+}
+
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+	struct timeval delta;
+	struct timespec abstime;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	gettimeofday(&delta, NULL);
+
+	abstime.tv_sec = delta.tv_sec + (ms/1000);
+	abstime.tv_nsec = (delta.tv_usec + (ms%1000) * 1000) * 1000;
+        if ( abstime.tv_nsec > 1000000000 ) {
+          abstime.tv_sec += 1;
+          abstime.tv_nsec -= 1000000000;
+        }
+
+  tryagain:
+	retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime);
+	switch (retval) {
+	    case EINTR:
+		goto tryagain;
+		break;
+	    case ETIMEDOUT:
+		retval = SDL_MUTEX_TIMEDOUT;
+		break;
+	    case 0:
+		break;
+	    default:
+		SDL_SetError("pthread_cond_timedwait() failed");
+		retval = -1;
+		break;
+	}
+	return retval;
+}
+
+/* Wait on the condition variable, unlocking the provided mutex.
+   The mutex must be locked before entering this function!
+ */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	retval = 0;
+	if ( pthread_cond_wait(&cond->cond, &mutex->id) != 0 ) {
+		SDL_SetError("pthread_cond_wait() failed");
+		retval = -1;
+	}
+	return retval;
+}
+#endif

apps/plugins/sdl/src/thread/riscos/SDL_sysmutex.c

@@ -0,0 +1,153 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* RISC OS implementations uses pthreads based on linux code */
+
+#include "SDL_thread.h"
+
+#if SDL_THREADS_DISABLED
+#include "../generic/SDL_sysmutex.c"
+#else
+
+#include <pthread.h>
+
+struct SDL_mutex {
+	pthread_mutex_t id;
+#if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
+	int recursive;
+	pthread_t owner;
+#endif
+};
+
+SDL_mutex *SDL_CreateMutex (void)
+{
+	SDL_mutex *mutex;
+	pthread_mutexattr_t attr;
+
+	/* Allocate the structure */
+	mutex = (SDL_mutex *)SDL_calloc(1, sizeof(*mutex));
+	if ( mutex ) {
+		pthread_mutexattr_init(&attr);
+#if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
+		/* No extra attributes necessary */
+#else
+		pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+#endif /* SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX */
+		if ( pthread_mutex_init(&mutex->id, &attr) != 0 ) {
+			SDL_SetError("pthread_mutex_init() failed");
+			SDL_free(mutex);
+			mutex = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(mutex);
+}
+
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) {
+		pthread_mutex_destroy(&mutex->id);
+		SDL_free(mutex);
+	}
+}
+
+/* Lock the mutex */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+	int retval;
+#if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
+	pthread_t this_thread;
+#endif
+
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	retval = 0;
+#if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
+	this_thread = pthread_self();
+	if ( mutex->owner == this_thread ) {
+		++mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   We set the locking thread id after we obtain the lock
+		   so unlocks from other threads will fail.
+		*/
+		if ( pthread_mutex_lock(&mutex->id) == 0 ) {
+			mutex->owner = this_thread;
+			mutex->recursive = 0;
+		} else {
+			SDL_SetError("pthread_mutex_lock() failed");
+			retval = -1;
+		}
+	}
+#else
+	if ( pthread_mutex_lock(&mutex->id) < 0 ) {
+		SDL_SetError("pthread_mutex_lock() failed");
+		retval = -1;
+	}
+#endif
+	return retval;
+}
+
+int SDL_mutexV(SDL_mutex *mutex)
+{
+	int retval;
+
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	retval = 0;
+#if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX
+	/* We can only unlock the mutex if we own it */
+	if ( pthread_self() == mutex->owner ) {
+		if ( mutex->recursive ) {
+			--mutex->recursive;
+		} else {
+			/* The order of operations is important.
+			   First reset the owner so another thread doesn't lock
+			   the mutex and set the ownership before we reset it,
+			   then release the lock semaphore.
+			 */
+			mutex->owner = 0;
+			pthread_mutex_unlock(&mutex->id);
+		}
+	} else {
+		SDL_SetError("mutex not owned by this thread");
+		retval = -1;
+	}
+
+#else
+	if ( pthread_mutex_unlock(&mutex->id) < 0 ) {
+		SDL_SetError("pthread_mutex_unlock() failed");
+		retval = -1;
+	}
+#endif /* SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX */
+
+	return retval;
+}
+#endif

apps/plugins/sdl/src/thread/riscos/SDL_sysmutex_c.h

@@ -0,0 +1,34 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_mutex_c_h
+#define _SDL_mutex_c_h
+
+#if !SDL_THREADS_DISABLED
+struct SDL_mutex {
+	pthread_mutex_t id;
+};
+#endif
+
+
+#endif /* _SDL_mutex_c_h */

apps/plugins/sdl/src/thread/riscos/SDL_syssem.c

@@ -0,0 +1,203 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#include <errno.h>
+
+#include "SDL_config.h"
+
+/* RISC OS semiphores based on linux code */
+
+
+#include "SDL_timer.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+#if !SDL_THREADS_DISABLED
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return (SDL_sem *)0;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	return;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	return 0;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+#else
+
+
+#include <unistd.h>			/* For getpid() */
+#include <pthread.h>
+#include <semaphore.h>
+
+struct SDL_semaphore {
+	sem_t *sem;
+	sem_t sem_data;
+};
+
+/* Create a semaphore, initialized with value */
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_sem *sem = (SDL_sem *) SDL_malloc(sizeof(SDL_sem));
+	if ( sem ) {
+		if ( sem_init(&sem->sem_data, 0, initial_value) < 0 ) {
+			SDL_SetError("sem_init() failed");
+			SDL_free(sem);
+			sem = NULL;
+		} else {
+			sem->sem = &sem->sem_data;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return sem;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( sem ) {
+		sem_destroy(sem->sem);
+		SDL_free(sem);
+	}
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+	retval = SDL_MUTEX_TIMEDOUT;
+	if ( sem_trywait(sem->sem) == 0 ) {
+		retval = 0;
+	}
+	return retval;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	while ( ((retval = sem_wait(sem->sem)) == -1) && (errno == EINTR) ) {}
+	if ( retval < 0 ) {
+		SDL_SetError("sem_wait() failed");
+	}
+	return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	/* Try the easy cases first */
+	if ( timeout == 0 ) {
+		return SDL_SemTryWait(sem);
+	}
+	if ( timeout == SDL_MUTEX_MAXWAIT ) {
+		return SDL_SemWait(sem);
+	}
+
+	/* Ack!  We have to busy wait... */
+	timeout += SDL_GetTicks();
+	do {
+		retval = SDL_SemTryWait(sem);
+		if ( retval == 0 ) {
+			break;
+		}
+		SDL_Delay(1);
+	} while ( SDL_GetTicks() < timeout );
+
+	return retval;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	int ret = 0;
+	if ( sem ) {
+		sem_getvalue(sem->sem, &ret);
+		if ( ret < 0 ) {
+			ret = 0;
+		}
+	}
+	return (Uint32)ret;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = sem_post(sem->sem);
+	if ( retval < 0 ) {
+		SDL_SetError("sem_post() failed");
+	}
+	return retval;
+}
+
+#endif /* !SDL_THREADS_DISABLED */

apps/plugins/sdl/src/thread/riscos/SDL_systhread.c

@@ -0,0 +1,144 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* RISC OS version based on pthreads linux source */
+
+#include "SDL_thread.h"
+#include "../SDL_systhread.h"
+
+#if SDL_THREADS_DISABLED
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	SDL_SetError("Threads have not been compiled into this version of the library");
+	return(-1);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return(0);
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	return;
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	return;
+}
+
+#else
+
+#include <signal.h>
+
+/* List of signals to mask in the subthreads */
+static int sig_list[] = {
+	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
+	SIGVTALRM, SIGPROF, 0
+};
+
+#include <pthread.h>
+
+int riscos_using_threads = 0;
+Uint32 riscos_main_thread = 0; /* Thread running events */
+
+static void *RunThread(void *data)
+{
+	SDL_RunThread(data);
+	pthread_exit((void*)0);
+	return((void *)0);		/* Prevent compiler warning */
+}
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	pthread_attr_t type;
+
+	/* Set the thread attributes */
+	if ( pthread_attr_init(&type) != 0 ) {
+		SDL_SetError("Couldn't initialize pthread attributes");
+		return(-1);
+	}
+	pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
+
+	/* Create the thread and go! */
+	if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+
+        if (riscos_using_threads == 0)
+        {
+           riscos_using_threads = 1;
+           riscos_main_thread = SDL_ThreadID();
+        }
+      
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	int i;
+	sigset_t mask;
+
+	/* Mask asynchronous signals for this thread */
+	sigemptyset(&mask);
+	for ( i=0; sig_list[i]; ++i ) {
+		sigaddset(&mask, sig_list[i]);
+	}
+	pthread_sigmask(SIG_BLOCK, &mask, 0);
+	
+#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
+	/* Allow ourselves to be asynchronously cancelled */
+	{ int oldstate;
+		pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
+	}
+#endif
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return((Uint32)pthread_self());
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	pthread_join(thread->handle, 0);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
+	pthread_cancel(thread->handle);
+#else
+	pthread_kill(thread->handle, SIGKILL);
+#endif
+}
+
+#endif

apps/plugins/sdl/src/thread/riscos/SDL_systhread_c.h

@@ -0,0 +1,34 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#if SDL_THREADS_DISABLED
+
+typedef int SYS_ThreadHandle;
+
+#else
+
+#include <pthread.h>
+
+typedef pthread_t SYS_ThreadHandle;
+
+#endif

apps/plugins/sdl/src/thread/rockbox/SDL_syscond.c

@@ -0,0 +1,215 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of condition variables using semaphores and mutexes */
+/*
+   This implementation borrows heavily from the BeOS condition variable
+   implementation, written by Christopher Tate and Owen Smith.  Thanks!
+ */
+
+#include "SDL_thread.h"
+
+struct SDL_cond
+{
+	SDL_mutex *lock;
+	int waiting;
+	int signals;
+	SDL_sem *wait_sem;
+	SDL_sem *wait_done;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		cond->lock = SDL_CreateMutex();
+		cond->wait_sem = SDL_CreateSemaphore(0);
+		cond->wait_done = SDL_CreateSemaphore(0);
+		cond->waiting = cond->signals = 0;
+		if ( ! cond->lock || ! cond->wait_sem || ! cond->wait_done ) {
+			SDL_DestroyCond(cond);
+			cond = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		if ( cond->wait_sem ) {
+			SDL_DestroySemaphore(cond->wait_sem);
+		}
+		if ( cond->wait_done ) {
+			SDL_DestroySemaphore(cond->wait_done);
+		}
+		if ( cond->lock ) {
+			SDL_DestroyMutex(cond->lock);
+		}
+		SDL_free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		++cond->signals;
+		SDL_SemPost(cond->wait_sem);
+		SDL_UnlockMutex(cond->lock);
+		SDL_SemWait(cond->wait_done);
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		int i, num_waiting;
+
+		num_waiting = (cond->waiting - cond->signals);
+		cond->signals = cond->waiting;
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemPost(cond->wait_sem);
+		}
+		/* Now all released threads are blocked here, waiting for us.
+		   Collect them all (and win fabulous prizes!) :-)
+		 */
+		SDL_UnlockMutex(cond->lock);
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemWait(cond->wait_done);
+		}
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Wait on the condition variable for at most 'ms' milliseconds.
+   The mutex must be locked before entering this function!
+   The mutex is unlocked during the wait, and locked again after the wait.
+
+Typical use:
+
+Thread A:
+	SDL_LockMutex(lock);
+	while ( ! condition ) {
+		SDL_CondWait(cond);
+	}
+	SDL_UnlockMutex(lock);
+
+Thread B:
+	SDL_LockMutex(lock);
+	...
+	condition = true;
+	...
+	SDL_UnlockMutex(lock);
+ */
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* Obtain the protection mutex, and increment the number of waiters.
+	   This allows the signal mechanism to only perform a signal if there
+	   are waiting threads.
+	 */
+	SDL_LockMutex(cond->lock);
+	++cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Unlock the mutex, as is required by condition variable semantics */
+	SDL_UnlockMutex(mutex);
+
+	/* Wait for a signal */
+	if ( ms == SDL_MUTEX_MAXWAIT ) {
+		retval = SDL_SemWait(cond->wait_sem);
+	} else {
+		retval = SDL_SemWaitTimeout(cond->wait_sem, ms);
+	}
+
+	/* Let the signaler know we have completed the wait, otherwise
+           the signaler can race ahead and get the condition semaphore
+           if we are stopped between the mutex unlock and semaphore wait,
+           giving a deadlock.  See the following URL for details:
+        http://www-classic.be.com/aboutbe/benewsletter/volume_III/Issue40.html
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->signals > 0 ) {
+		/* If we timed out, we need to eat a condition signal */
+		if ( retval > 0 ) {
+			SDL_SemWait(cond->wait_sem);
+		}
+		/* We always notify the signal thread that we are done */
+		SDL_SemPost(cond->wait_done);
+
+		/* Signal handshake complete */
+		--cond->signals;
+	}
+	--cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Lock the mutex, as is required by condition variable semantics */
+	SDL_LockMutex(mutex);
+
+	return retval;
+}
+
+/* Wait on the condition variable forever */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
+}

apps/plugins/sdl/src/thread/rockbox/SDL_sysmutex.c

@@ -0,0 +1,120 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of mutexes using semaphores */
+
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+struct SDL_mutex {
+    int recursive;
+    Uint32 owner;
+    struct mutex m;
+};
+
+/* Create a mutex */
+SDL_mutex *SDL_CreateMutex(void)
+{
+    SDL_mutex *mutex;
+
+    /* Allocate mutex memory */
+    mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
+    if ( mutex ) {
+        rb->mutex_init(&mutex->m);
+        mutex->recursive = 0;
+        mutex->owner = 0;
+    } else {
+        SDL_OutOfMemory();
+    }
+    return mutex;
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+    if ( mutex ) {
+        SDL_free(mutex);
+    }
+}
+
+int SDL_mutexP(SDL_mutex *mutex)
+{
+#if SDL_THREADS_DISABLED
+    return 0;
+#else
+    Uint32 this_thread;
+
+    if ( mutex == NULL ) {
+        SDL_SetError("Passed a NULL mutex");
+        return -1;
+    }
+
+    this_thread = SDL_ThreadID();
+    if ( mutex->owner == this_thread ) {
+        ++mutex->recursive;
+    } else {
+        /* The order of operations is important.
+           We set the locking thread id after we obtain the lock
+           so unlocks from other threads will fail.
+        */
+        rb->mutex_lock(&mutex->m);
+        mutex->owner = this_thread;
+        mutex->recursive = 0;
+    }
+
+    return 0;
+#endif /* SDL_THREADS_DISABLED */
+}
+
+/* Unlock the mutex */
+int SDL_mutexV(SDL_mutex *mutex)
+{
+#if SDL_THREADS_DISABLED
+    return 0;
+#else
+    if ( mutex == NULL ) {
+        SDL_SetError("Passed a NULL mutex");
+        return -1;
+    }
+
+    /* If we don't own the mutex, we can't unlock it */
+    if ( SDL_ThreadID() != mutex->owner ) {
+        SDL_SetError("mutex not owned by this thread");
+        return -1;
+    }
+
+    if ( mutex->recursive ) {
+        --mutex->recursive;
+    } else {
+        /* The order of operations is important.
+           First reset the owner so another thread doesn't lock
+           the mutex and set the ownership before we reset it,
+           then release the lock semaphore.
+        */
+        mutex->owner = 0;
+        rb->mutex_unlock(&mutex->m);
+    }
+    return 0;
+#endif /* SDL_THREADS_DISABLED */
+}

apps/plugins/sdl/src/thread/rockbox/SDL_sysmutex_c.h

@@ -0,0 +1,23 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+

apps/plugins/sdl/src/thread/rockbox/SDL_syssem.c

@@ -0,0 +1,170 @@
+/*
+  SDL - Simple DirectMedia Layer
+  Copyright (C) 1997-2012 Sam Lantinga
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Sam Lantinga
+  slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* An implementation of semaphores using mutexes and condition variables */
+
+#include "SDL_timer.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+#if SDL_THREADS_DISABLED
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+    SDL_SetError("SDL not configured with thread support");
+    return (SDL_sem *)0;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+    return;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+    SDL_SetError("SDL not configured with thread support");
+    return -1;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+    SDL_SetError("SDL not configured with thread support");
+    return -1;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+    SDL_SetError("SDL not configured with thread support");
+    return -1;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+    return 0;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+    SDL_SetError("SDL not configured with thread support");
+    return -1;
+}
+
+#else
+
+struct SDL_semaphore
+{
+    struct semaphore s;
+};
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+    SDL_sem *sem;
+
+    sem = (SDL_sem *)SDL_malloc(sizeof(*sem));
+    if ( ! sem ) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    rb->semaphore_init(&sem->s, 99, initial_value);
+
+    return sem;
+}
+
+/* WARNING:
+   You cannot call this function when another thread is using the semaphore.
+*/
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+    if ( sem ) {
+        SDL_free(sem);
+    }
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+    int retval;
+
+    if ( ! sem ) {
+        SDL_SetError("Passed a NULL semaphore");
+        return -1;
+    }
+
+    retval = SDL_MUTEX_TIMEDOUT;
+
+    if(rb->semaphore_wait(&sem->s, 0) == OBJ_WAIT_SUCCEEDED)
+        retval = 0;
+
+    return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+    if ( ! sem ) {
+        SDL_SetError("Passed a NULL semaphore");
+        return -1;
+    }
+
+    /* A timeout of 0 is an easy case */
+    if ( timeout == 0 ) {
+        return SDL_SemTryWait(sem);
+    }
+
+    if(rb->semaphore_wait(&sem->s, timeout / (1000 / HZ)) == OBJ_WAIT_SUCCEEDED)
+        return 0;
+    else
+        return SDL_MUTEX_TIMEDOUT;
+
+    return SDL_MUTEX_TIMEDOUT;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+    return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+    Uint32 value;
+
+    value = 0;
+    if ( sem ) {
+        value = sem->s.count;
+    }
+    return value;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+    if ( ! sem ) {
+        SDL_SetError("Passed a NULL semaphore");
+        return -1;
+    }
+
+    rb->semaphore_release(&sem->s);
+
+    return 0;
+}
+
+#endif /* SDL_THREADS_DISABLED */

apps/plugins/sdl/src/thread/rockbox/SDL_systhread.c

@@ -0,0 +1,89 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#include "SDL_config.h"
+
+#if SDL_THREAD_ROCKBOX
+
+/* Thread management routines for rockbox */
+
+#include "SDL_thread.h"
+
+#include "../SDL_systhread.h"
+#include "../SDL_thread_c.h"
+
+#include "plugin.h"
+
+static void *global_args = NULL;
+
+static void rbsdl_runthread(void)
+{
+    void *args = global_args;
+    global_args = NULL;
+    SDL_RunThread(args);
+}
+
+#define MAX_THREAD 4
+static char names[MAX_THREAD][16];
+static long stacks[MAX_THREAD][DEFAULT_STACK_SIZE / sizeof(long)];
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+    static int threadnum = 0;
+    snprintf(names[threadnum], 16, "sdl_%d", threadnum);
+
+    while(global_args) rb->yield(); /* busy wait */
+
+    global_args = args;
+
+    thread->handle = rb->create_thread(rbsdl_runthread, stacks[threadnum], DEFAULT_STACK_SIZE,
+                                       0, names[threadnum] /* collisions allowed? */
+                                       IF_PRIO(, PRIORITY_USER_INTERFACE)
+                                       IF_COP(, COP));
+
+    threadnum++;
+
+    return 0;
+}
+
+void SDL_SYS_SetupThread(void)
+{
+    return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+    return rb->thread_self();
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+    rb->thread_wait(thread->handle);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+#warning How do we do this?
+    return;
+}
+
+#endif

apps/plugins/sdl/src/thread/rockbox/SDL_systhread_c.h

@@ -0,0 +1,24 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+typedef unsigned int SYS_ThreadHandle;

apps/plugins/sdl/src/thread/symbian/SDL_sysmutex.cpp

@@ -0,0 +1,130 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+/*
+    SDL_sysmutex.cpp
+
+    Epoc version by Markus Mertama (w@iki.fi)
+*/
+
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_sysmutex.c,v 1.1.2.3 2000/06/22 15:25:23 hercules Exp $";
+#endif
+
+/* Mutex functions using the Win32 API */
+
+//#include <stdio.h>
+//#include <stdlib.h>
+
+#include <e32std.h>
+
+#include "epoc_sdl.h"
+
+#include "SDL_error.h"
+#include "SDL_mutex.h"
+
+
+#ifdef EKA2 //???
+struct SDL_mutex
+    {
+    TInt handle;
+    };
+#else
+struct _SDL_mutex
+    {
+    TInt handle;
+    };
+#endif
+
+extern TInt CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny*, TAny*);
+
+TInt NewMutex(const TDesC& aName, TAny* aPtr1, TAny*)
+    {
+    return ((RMutex*)aPtr1)->CreateGlobal(aName);
+    }
+    
+void DeleteMutex(TAny* aMutex)
+    {
+    SDL_DestroyMutex ((SDL_mutex*) aMutex);
+    }
+
+/* Create a mutex */
+SDL_mutex *SDL_CreateMutex(void)
+{
+    RMutex rmutex;
+
+    TInt status = CreateUnique(NewMutex, &rmutex, NULL);
+	if(status != KErrNone)
+	    {
+			SDL_SetError("Couldn't create mutex");
+		}
+    SDL_mutex* mutex = new /*(ELeave)*/ SDL_mutex;
+    mutex->handle = rmutex.Handle();
+    EpocSdlEnv::AppendCleanupItem(TSdlCleanupItem(DeleteMutex, mutex));
+	return(mutex);
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) 
+	{
+    RMutex rmutex;
+    rmutex.SetHandle(mutex->handle);
+    if(rmutex.IsHeld())
+        {
+	    rmutex.Signal();
+        }
+	rmutex.Close();
+	EpocSdlEnv::RemoveCleanupItem(mutex);
+	delete(mutex);
+    mutex = NULL;
+	}
+}
+
+/* Lock the mutex */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+    RMutex rmutex;
+    rmutex.SetHandle(mutex->handle);
+	rmutex.Wait(); 
+	return(0);
+}
+
+/* Unlock the mutex */
+int SDL_mutexV(SDL_mutex *mutex)
+{
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+	RMutex rmutex;
+    rmutex.SetHandle(mutex->handle);
+	rmutex.Signal();
+	return(0);
+}

apps/plugins/sdl/src/thread/symbian/SDL_syssem.cpp

@@ -0,0 +1,214 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+/*
+    SDL_syssem.cpp
+
+    Epoc version by Markus Mertama  (w@iki.fi)
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_syssem.c,v 1.1.2.4 2000/06/22 15:24:48 hercules Exp $";
+#endif
+
+/* Semaphore functions using the Win32 API */
+
+//#include <stdio.h>
+//#include <stdlib.h>
+#include <e32std.h>
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+
+
+#define SDL_MUTEX_TIMEOUT -2
+
+struct SDL_semaphore
+ {
+ TInt handle;
+ TInt count;
+ };
+
+
+extern TInt CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny*, TAny*);
+#ifndef EKA2
+extern TInt NewThread(const TDesC& aName, TAny* aPtr1, TAny* aPtr2);
+#endif
+
+TInt NewSema(const TDesC& aName, TAny* aPtr1, TAny* aPtr2) 
+    {
+    TInt value = *((TInt*) aPtr2);
+    return ((RSemaphore*)aPtr1)->CreateGlobal(aName, value);
+    }
+
+/* Create a semaphore */
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+   RSemaphore s;
+   TInt status = CreateUnique(NewSema, &s, &initial_value);
+   if(status != KErrNone)
+	 {
+			SDL_SetError("Couldn't create semaphore");
+	}
+    SDL_semaphore* sem = new /*(ELeave)*/ SDL_semaphore;  
+    sem->handle = s.Handle();
+	sem->count = initial_value;
+	return(sem);
+}
+
+/* Free the semaphore */
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( sem ) 
+	{
+    RSemaphore sema;
+    sema.SetHandle(sem->handle);
+	while(--sem->count)
+	    sema.Signal();
+    sema.Close();
+    delete sem;
+	sem = NULL;
+	}
+}
+
+#ifndef EKA2
+
+  struct TInfo
+    {
+        TInfo(TInt aTime, TInt aHandle) : 
+        iTime(aTime), iHandle(aHandle), iVal(0) {}
+        TInt iTime;
+        TInt iHandle;
+        TInt iVal; 
+    };
+
+
+
+TBool ThreadRun(TAny* aInfo)
+    {
+        TInfo* info = STATIC_CAST(TInfo*, aInfo);
+        User::After(info->iTime);
+        RSemaphore sema;
+        sema.SetHandle(info->iHandle);
+        sema.Signal();
+        info->iVal = SDL_MUTEX_TIMEOUT;
+        return 0;
+    }
+    
+#endif 
+    
+    
+void _WaitAll(SDL_sem *sem)
+    {
+       //since SemTryWait may changed the counter.
+       //this may not be atomic, but hopes it works.
+    RSemaphore sema;
+    sema.SetHandle(sem->handle);
+    sema.Wait();
+    while(sem->count < 0)
+        {
+        sema.Wait();
+        }    
+    }
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL sem");
+		return -1;
+	}
+
+	if ( timeout == SDL_MUTEX_MAXWAIT )
+	    {
+	    _WaitAll(sem);
+		return SDL_MUTEX_MAXWAIT;
+	    } 
+	
+#ifdef EKA2
+
+    RSemaphore sema;
+    sema.SetHandle(sem->handle);
+    if(KErrNone == sema.Wait(timeout))
+    	return 0;
+    return -1;
+#else
+	RThread thread;
+	
+	TInfo* info = new (ELeave)TInfo(timeout, sem->handle);
+	
+    TInt status = CreateUnique(NewThread, &thread, info);
+  
+	if(status != KErrNone)
+	    return status;
+	
+	thread.Resume();
+	
+	_WaitAll(sem);
+	
+	if(thread.ExitType() == EExitPending)
+	    {
+	        thread.Kill(SDL_MUTEX_TIMEOUT);
+	    }
+	
+	thread.Close();
+	
+	return info->iVal;
+#endif
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+    if(sem->count > 0)
+        {
+        sem->count--;
+        }
+    return SDL_MUTEX_TIMEOUT;
+}
+
+int SDL_SemWait(SDL_sem *sem) 
+{
+	return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+/* Returns the current count of the semaphore */
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL sem");
+		return 0;
+	}
+	return sem->count;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL sem");
+		return -1;
+	}
+	sem->count++;
+    RSemaphore sema;
+    sema.SetHandle(sem->handle);
+	sema.Signal();
+	return 0;
+}

apps/plugins/sdl/src/thread/symbian/SDL_systhread.cpp

@@ -0,0 +1,146 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+/*
+    SDL_systhread.cpp
+    Epoc thread management routines for SDL
+
+    Epoc version by Markus Mertama  (w@iki.fi)
+*/
+
+#include "epoc_sdl.h"
+
+//#include <stdlib.h>
+//#include <stdio.h>
+
+
+
+extern "C" {
+#undef NULL
+#include "SDL_error.h"
+#include "SDL_thread.h"
+#include "SDL_systhread.h"
+#include "SDL_thread_c.h"
+    }
+
+#include <e32std.h>
+#include "epoc_sdl.h"
+
+
+static int object_count;
+
+int RunThread(TAny* data)
+{
+	CTrapCleanup* cleanup = CTrapCleanup::New();
+	TRAPD(err, SDL_RunThread(data));
+	EpocSdlEnv::CleanupItems();
+	delete cleanup;
+	return(err);
+}
+
+
+TInt NewThread(const TDesC& aName, TAny* aPtr1, TAny* aPtr2)
+    {
+    return ((RThread*)(aPtr1))->Create(aName,
+            RunThread,
+            KDefaultStackSize,
+            NULL,
+            aPtr2);
+    }
+
+int CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny* aPtr1, TAny* aPtr2)
+    {
+    TBuf<16> name;
+    TInt status = KErrNone;
+    do
+        {
+        object_count++;
+        name.Format(_L("SDL_%x"), object_count);
+        status = aFunc(name, aPtr1, aPtr2);
+        }
+        while(status == KErrAlreadyExists);
+    return status;
+    }
+
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+    RThread rthread;
+   
+    const TInt status = CreateUnique(NewThread, &rthread, args);
+    if (status != KErrNone) 
+    {
+        delete(((RThread*)(thread->handle)));
+        thread->handle = NULL;
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+	rthread.Resume();
+    thread->handle = rthread.Handle();
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+    RThread current;
+    const TThreadId id = current.Id();
+	return id;
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+    SDL_TRACE1("Close thread", thread);
+    RThread t;
+    const TInt err = t.Open(thread->threadid);
+    if(err == KErrNone && t.ExitType() == EExitPending)
+        {
+        TRequestStatus status;
+        t.Logon(status);
+        User::WaitForRequest(status);
+        }
+    t.Close();
+    
+  /*  RUndertaker taker;
+    taker.Create();
+    TRequestStatus status;
+    taker.Logon(status, thread->handle);
+    User::WaitForRequest(status);
+    taker.Close();*/
+    SDL_TRACE1("Closed thread", thread);
+}
+
+/* WARNING: This function is really a last resort.
+ * Threads should be signaled and then exit by themselves.
+ * TerminateThread() doesn't perform stack and DLL cleanup.
+ */
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+    RThread rthread;
+    rthread.SetHandle(thread->handle);
+	rthread.Kill(0);
+	rthread.Close();
+}

apps/plugins/sdl/src/thread/symbian/SDL_systhread_c.h

@@ -0,0 +1,30 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+/*
+    SDL_systhread_c.h
+
+    Epoc version by Markus Mertama (w@iki.fi)
+*/
+
+typedef int SYS_ThreadHandle;
+

apps/plugins/sdl/src/thread/win32/SDL_sysmutex.c

@@ -0,0 +1,95 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Mutex functions using the Win32 API */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#include "SDL_mutex.h"
+
+
+struct SDL_mutex {
+	HANDLE id;
+};
+
+/* Create a mutex */
+SDL_mutex *SDL_CreateMutex(void)
+{
+	SDL_mutex *mutex;
+
+	/* Allocate mutex memory */
+	mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
+	if ( mutex ) {
+		/* Create the mutex, with initial value signaled */
+		mutex->id = CreateMutex(NULL, FALSE, NULL);
+		if ( ! mutex->id ) {
+			SDL_SetError("Couldn't create mutex");
+			SDL_free(mutex);
+			mutex = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(mutex);
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) {
+		if ( mutex->id ) {
+			CloseHandle(mutex->id);
+			mutex->id = 0;
+		}
+		SDL_free(mutex);
+	}
+}
+
+/* Lock the mutex */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+	if ( WaitForSingleObject(mutex->id, INFINITE) == WAIT_FAILED ) {
+		SDL_SetError("Couldn't wait on mutex");
+		return -1;
+	}
+	return(0);
+}
+
+/* Unlock the mutex */
+int SDL_mutexV(SDL_mutex *mutex)
+{
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+	if ( ReleaseMutex(mutex->id) == FALSE ) {
+		SDL_SetError("Couldn't release mutex");
+		return -1;
+	}
+	return(0);
+}

apps/plugins/sdl/src/thread/win32/SDL_syssem.c

@@ -0,0 +1,164 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Semaphore functions using the Win32 API */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#include "SDL_thread.h"
+#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
+#include "win_ce_semaphore.h"
+#endif
+
+
+struct SDL_semaphore {
+#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
+	SYNCHHANDLE id;
+#else
+	HANDLE id;
+#endif
+	volatile LONG count;
+};
+
+
+/* Create a semaphore */
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_sem *sem;
+
+	/* Allocate sem memory */
+	sem = (SDL_sem *)SDL_malloc(sizeof(*sem));
+	if ( sem ) {
+		/* Create the semaphore, with max value 32K */
+#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
+		sem->id = CreateSemaphoreCE(NULL, initial_value, 32*1024, NULL);
+#else
+		sem->id = CreateSemaphore(NULL, initial_value, 32*1024, NULL);
+#endif
+		sem->count = (LONG) initial_value;
+		if ( ! sem->id ) {
+			SDL_SetError("Couldn't create semaphore");
+			SDL_free(sem);
+			sem = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(sem);
+}
+
+/* Free the semaphore */
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( sem ) {
+		if ( sem->id ) {
+#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
+			CloseSynchHandle(sem->id);
+#else
+			CloseHandle(sem->id);
+#endif
+			sem->id = 0;
+		}
+		SDL_free(sem);
+	}
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int retval;
+	DWORD dwMilliseconds;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL sem");
+		return -1;
+	}
+
+	if ( timeout == SDL_MUTEX_MAXWAIT ) {
+		dwMilliseconds = INFINITE;
+	} else {
+		dwMilliseconds = (DWORD)timeout;
+	}
+#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
+	switch (WaitForSemaphoreCE(sem->id, dwMilliseconds)) {
+#else
+	switch (WaitForSingleObject(sem->id, dwMilliseconds)) {
+#endif
+	    case WAIT_OBJECT_0:
+		InterlockedDecrement(&sem->count);
+		retval = 0;
+		break;
+	    case WAIT_TIMEOUT:
+		retval = SDL_MUTEX_TIMEDOUT;
+		break;
+	    default:
+		SDL_SetError("WaitForSingleObject() failed");
+		retval = -1;
+		break;
+	}
+	return retval;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	return SDL_SemWaitTimeout(sem, 0);
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+/* Returns the current count of the semaphore */
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL sem");
+		return 0;
+	}
+	return (Uint32) sem->count;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL sem");
+		return -1;
+	}
+	/* Increase the counter in the first place, because
+	 * after a successful release the semaphore may
+	 * immediately get destroyed by another thread which
+	 * is waiting for this semaphore.
+	 */
+	InterlockedIncrement(&sem->count);
+#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
+	if ( ReleaseSemaphoreCE(sem->id, 1, NULL) == FALSE ) {
+#else
+	if ( ReleaseSemaphore(sem->id, 1, NULL) == FALSE ) {
+#endif
+		InterlockedDecrement(&sem->count);	/* restore */
+		SDL_SetError("ReleaseSemaphore() failed");
+		return -1;
+	}
+	return 0;
+}

apps/plugins/sdl/src/thread/win32/SDL_systhread.c

@@ -0,0 +1,162 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* Win32 thread management routines for SDL */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#include "SDL_thread.h"
+#include "../SDL_thread_c.h"
+#include "../SDL_systhread.h"
+
+#ifndef SDL_PASSED_BEGINTHREAD_ENDTHREAD
+#ifndef _WIN32_WCE
+/* We'll use the C library from this DLL */
+#include <process.h>
+#endif
+
+#if defined(__WATCOMC__)
+/* This is for Watcom targets except OS2 */
+#if __WATCOMC__ < 1240
+#define __watcall
+#endif
+typedef unsigned long (__watcall *pfnSDL_CurrentBeginThread) (void *, unsigned,
+        unsigned (__stdcall *func)(void *), void *arg, 
+        unsigned, unsigned *threadID);
+typedef void (__watcall *pfnSDL_CurrentEndThread)(unsigned code);
+#elif (defined(__MINGW32__) && (__GNUC__ < 4))
+typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
+        unsigned (__stdcall *func)(void *), void *arg, 
+        unsigned, unsigned *threadID);
+typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
+#else
+typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
+        unsigned (__stdcall *func)(void *), void *arg, 
+        unsigned, unsigned *threadID);
+typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
+#endif
+#endif /* !SDL_PASSED_BEGINTHREAD_ENDTHREAD */
+
+
+typedef struct ThreadStartParms
+{
+  void *args;
+  pfnSDL_CurrentEndThread pfnCurrentEndThread;
+} tThreadStartParms, *pThreadStartParms;
+
+static DWORD RunThread(void *data)
+{
+  pThreadStartParms pThreadParms = (pThreadStartParms)data;
+  pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
+
+  // Call the thread function!
+  SDL_RunThread(pThreadParms->args);
+
+  // Get the current endthread we have to use!
+  if (pThreadParms)
+  {
+    pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
+    SDL_free(pThreadParms);
+  }
+  // Call endthread!
+  if (pfnCurrentEndThread)
+    (*pfnCurrentEndThread)(0);
+  return(0);
+}
+
+static DWORD WINAPI RunThreadViaCreateThread(LPVOID data)
+{
+  return RunThread(data);
+}
+
+static unsigned __stdcall RunThreadViaBeginThreadEx(void *data)
+{
+  return (unsigned) RunThread(data);
+}
+
+#ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
+{
+#else
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+#ifdef _WIN32_WCE
+	pfnSDL_CurrentBeginThread pfnBeginThread = NULL;
+	pfnSDL_CurrentEndThread pfnEndThread = NULL;
+#else
+	pfnSDL_CurrentBeginThread pfnBeginThread = _beginthreadex;
+	pfnSDL_CurrentEndThread pfnEndThread = _endthreadex;
+#endif
+#endif /* SDL_PASSED_BEGINTHREAD_ENDTHREAD */
+	pThreadStartParms pThreadParms = (pThreadStartParms)SDL_malloc(sizeof(tThreadStartParms));
+	if (!pThreadParms) {
+		SDL_OutOfMemory();
+		return(-1);
+	}
+
+	// Save the function which we will have to call to clear the RTL of calling app!
+	pThreadParms->pfnCurrentEndThread = pfnEndThread;
+	// Also save the real parameters we have to pass to thread function
+	pThreadParms->args = args;
+
+	if (pfnBeginThread) {
+		unsigned threadid = 0;
+		thread->handle = (SYS_ThreadHandle)
+				((size_t) pfnBeginThread(NULL, 0, RunThreadViaBeginThreadEx,
+										 pThreadParms, 0, &threadid));
+	} else {
+		DWORD threadid = 0;
+		thread->handle = CreateThread(NULL, 0, RunThreadViaCreateThread, pThreadParms, 0, &threadid);
+	}
+	if (thread->handle == NULL) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return((Uint32)GetCurrentThreadId());
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	WaitForSingleObject(thread->handle, INFINITE);
+	CloseHandle(thread->handle);
+}
+
+/* WARNING: This function is really a last resort.
+ * Threads should be signaled and then exit by themselves.
+ * TerminateThread() doesn't perform stack and DLL cleanup.
+ */
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	TerminateThread(thread->handle, FALSE);
+}

apps/plugins/sdl/src/thread/win32/SDL_systhread_c.h

@@ -0,0 +1,28 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+typedef HANDLE SYS_ThreadHandle;
+

apps/plugins/sdl/src/thread/win32/win_ce_semaphore.c

@@ -0,0 +1,216 @@
+/* win_ce_semaphore.c
+
+   Copyright (c) 1998, Johnson M. Hart
+   (with corrections 2001 by Rainer Loritz)
+   Permission is granted for any and all use providing that this
+   copyright is properly acknowledged.
+   There are no assurances of suitability for any use whatsoever.
+
+   WINDOWS CE: There is a collection of Windows CE functions to simulate
+   semaphores using only a mutex and an event. As Windows CE events cannot
+   be named, these simulated semaphores cannot be named either.
+
+   Implementation notes:
+   1. All required internal data structures are allocated on the process's heap.
+   2. Where appropriate, a new error code is returned (see the header
+      file), or, if the error is a Win32 error, that code is unchanged.
+   3. Notice the new handle type "SYNCHHANDLE" that has handles, counters,
+      and other information. This structure will grow as new objects are added
+      to this set; some members are specific to only one or two of the objects.
+   4. Mutexes are used for critical sections. These could be replaced with
+      CRITICAL_SECTION objects but then this would give up the time out
+      capability.
+   5. The implementation shows several interesting aspects of synchronization, some
+      of which are specific to Win32 and some of which are general. These are pointed
+      out in the comments as appropriate.
+   6. The wait function emulates WaitForSingleObject only. An emulation of
+      WaitForMultipleObjects is much harder to implement outside the kernel,
+      and it is not clear how to handle a mixture of WCE semaphores and normal
+      events and mutexes. */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#include "win_ce_semaphore.h"
+
+static SYNCHHANDLE CleanUp (SYNCHHANDLE hSynch, DWORD Flags);
+
+SYNCHHANDLE CreateSemaphoreCE (
+
+   LPSECURITY_ATTRIBUTES lpSemaphoreAttributes,  /* pointer to security attributes */
+      LONG lInitialCount,   /* initial count */
+      LONG lMaximumCount,   /* maximum count */
+      LPCTSTR lpName )
+
+/* Semaphore for use with Windows CE that does not support them directly.
+   Requires a counter, a mutex to protect the counter, and an
+   autoreset event.
+
+   Here are the rules that must always hold between the autoreset event
+   and the mutex (any violation of these rules by the CE semaphore functions
+   will, in all likelihood, result in a defect):
+    1. No thread can set, pulse, or reset the event,
+       nor can it access any part of the SYNCHHANDLE structure,
+       without first gaining ownership of the mutex.
+       BUT, a thread can wait on the event without owning the mutex
+       (this is clearly necessary or else the event could never be set).
+    2. The event is in a signaled state if and only if the current semaphore
+       count ("CurCount") is greater than zero.
+    3. The semaphore count is always >= 0 and <= the maximum count */
+
+{
+   SYNCHHANDLE hSynch = NULL, result = NULL;
+
+   __try
+	{
+      if (lInitialCount > lMaximumCount || lMaximumCount < 0 || lInitialCount < 0) 
+	  {
+              /* Bad parameters */
+         SetLastError (SYNCH_ERROR);
+         __leave;
+      }
+
+      hSynch = HeapAlloc (GetProcessHeap(), HEAP_ZERO_MEMORY, SYNCH_HANDLE_SIZE);
+      if (hSynch == NULL) __leave;
+
+      hSynch->MaxCount = lMaximumCount;
+      hSynch->CurCount = lInitialCount;
+      hSynch->lpName = lpName;
+
+      hSynch->hMutex = CreateMutex (lpSemaphoreAttributes, FALSE, NULL);
+
+      WaitForSingleObject (hSynch->hMutex, INFINITE);
+      /*  Create the event. It is initially signaled if and only if the
+          initial count is > 0 */
+      hSynch->hEvent = CreateEvent (lpSemaphoreAttributes, FALSE, 
+              lInitialCount > 0, NULL);
+      ReleaseMutex (hSynch->hMutex);
+      hSynch->hSemph = NULL;
+   }
+   __finally
+   {
+       /* Return with the handle, or, if there was any error, return
+        a null after closing any open handles and freeing any allocated memory. */
+      result=CleanUp(hSynch, 6 /* An event and a mutex, but no semaphore. */);
+   }
+
+   return result;
+}
+
+BOOL ReleaseSemaphoreCE (SYNCHHANDLE hSemCE, LONG cReleaseCount, LPLONG lpPreviousCount)
+/* Windows CE equivalent to ReleaseSemaphore. */
+{
+   BOOL Result = TRUE;
+
+   /* Gain access to the object to assure that the release count
+      would not cause the total count to exceed the maximum. */
+
+   __try 
+   {
+      WaitForSingleObject (hSemCE->hMutex, INFINITE);
+	  /* reply only if asked to */	
+	  if (lpPreviousCount!=NULL)
+		 *lpPreviousCount = hSemCE->CurCount;
+      if (hSemCE->CurCount + cReleaseCount > hSemCE->MaxCount || cReleaseCount <= 0)
+	  {
+         SetLastError (SYNCH_ERROR);
+         Result = FALSE;
+         __leave;
+      }
+      hSemCE->CurCount += cReleaseCount;
+
+      /*  Set the autoreset event, releasing exactly one waiting thread, now or
+          in the future.  */
+
+      SetEvent (hSemCE->hEvent);
+   }
+   __finally
+   {
+      ReleaseMutex (hSemCE->hMutex);
+   }
+
+   return Result;
+}
+
+DWORD WaitForSemaphoreCE (SYNCHHANDLE hSemCE, DWORD dwMilliseconds)
+   /* Windows CE semaphore equivalent of WaitForSingleObject. */
+{
+   DWORD WaitResult;
+
+   WaitResult = WaitForSingleObject (hSemCE->hMutex, dwMilliseconds);
+   if (WaitResult != WAIT_OBJECT_0 && WaitResult != WAIT_ABANDONED_0) return WaitResult;
+   while (hSemCE->CurCount <= 0) 
+   { 
+
+      /* The count is 0, and the thread must wait on the event (which, by
+         the rules, is currently reset) for semaphore resources to become
+         available. First, of course, the mutex must be released so that another
+         thread will be capable of setting the event. */
+
+      ReleaseMutex (hSemCE->hMutex);
+
+      /*  Wait for the event to be signaled, indicating a semaphore state change.
+          The event is autoreset and signaled with a SetEvent (not PulseEvent)
+          so exactly one waiting thread (whether or not there is currently
+          a waiting thread) is released as a result of the SetEvent. */
+
+      WaitResult = WaitForSingleObject (hSemCE->hEvent, dwMilliseconds);
+      if (WaitResult != WAIT_OBJECT_0) return WaitResult;
+
+      /*  This is where the properties of setting of an autoreset event is critical
+          to assure that, even if the semaphore state changes between the
+          preceding Wait and the next, and even if NO threads are waiting
+          on the event at the time of the SetEvent, at least one thread
+          will be released. 
+          Pulsing a manual reset event would appear to work, but it would have
+          a defect which could appear if the semaphore state changed between
+          the two waits. */
+
+      WaitResult = WaitForSingleObject (hSemCE->hMutex, dwMilliseconds);
+      if (WaitResult != WAIT_OBJECT_0 && WaitResult != WAIT_ABANDONED_0) return WaitResult;
+
+   }
+   /* The count is not zero and this thread owns the mutex.  */
+
+   hSemCE->CurCount--;
+   /* The event is now unsignaled, BUT, the semaphore count may not be
+      zero, in which case the event should be signaled again
+      before releasing the mutex. */
+
+   if (hSemCE->CurCount > 0) SetEvent (hSemCE->hEvent);
+   ReleaseMutex (hSemCE->hMutex);
+   return WaitResult;
+}
+
+BOOL CloseSynchHandle (SYNCHHANDLE hSynch)
+/* Close a synchronization handle. 
+   Improvement: Test for a valid handle before dereferencing the handle. */
+{
+   BOOL Result = TRUE;
+   if (hSynch->hEvent != NULL) Result = Result && CloseHandle (hSynch->hEvent);
+   if (hSynch->hMutex != NULL) Result = Result && CloseHandle (hSynch->hMutex);
+   if (hSynch->hSemph != NULL) Result = Result && CloseHandle (hSynch->hSemph);
+   HeapFree (GetProcessHeap (), 0, hSynch);
+   return (Result);
+}
+
+static SYNCHHANDLE CleanUp (SYNCHHANDLE hSynch, DWORD Flags)
+{ /* Prepare to return from a create of a synchronization handle.
+     If there was any failure, free any allocated resources.
+     "Flags" indicates which Win32 objects are required in the 
+     synchronization handle. */
+
+   BOOL ok = TRUE;
+
+   if (hSynch == NULL) return NULL;
+   if ((Flags & 4) == 1 && (hSynch->hEvent == NULL)) ok = FALSE;
+   if ((Flags & 2) == 1 && (hSynch->hMutex == NULL)) ok = FALSE;
+   if ((Flags & 1) == 1 && (hSynch->hEvent == NULL)) ok = FALSE;
+   if (!ok) 
+   {
+      CloseSynchHandle (hSynch);
+      return NULL;
+   }
+   /* Everything worked */
+   return hSynch;
+}

apps/plugins/sdl/src/thread/win32/win_ce_semaphore.h

@@ -0,0 +1,22 @@
+/* win_ce_semaphore.h - header file to go with win_ce_semaphore.c */
+
+typedef struct _SYNCH_HANDLE_STRUCTURE {
+   HANDLE hEvent;
+   HANDLE hMutex;
+   HANDLE hSemph;
+   LONG MaxCount;
+   volatile LONG CurCount;
+   LPCTSTR lpName;
+} SYNCH_HANDLE_STRUCTURE, *SYNCHHANDLE;
+
+#define SYNCH_HANDLE_SIZE sizeof (SYNCH_HANDLE_STRUCTURE)
+
+        /* Error codes - all must have bit 29 set */
+#define SYNCH_ERROR 0X20000000   /* EXERCISE - REFINE THE ERROR NUMBERS */
+
+extern SYNCHHANDLE CreateSemaphoreCE (LPSECURITY_ATTRIBUTES, LONG, LONG, LPCTSTR);
+
+extern BOOL ReleaseSemaphoreCE (SYNCHHANDLE, LONG, LPLONG);
+extern DWORD WaitForSemaphoreCE (SYNCHHANDLE, DWORD);
+
+extern BOOL CloseSynchHandle (SYNCHHANDLE);