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add thread functionality, powered by pthreads

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@928 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Daniel Stenberg 2002-06-10 10:17:54 +00:00
parent b97f032464
commit 604cce76cf
2 changed files with 71 additions and 2 deletions
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4
uisimulator/x11/Makefile
View file

@ -48,7 +48,7 @@ LDFLAGS = -lX11 -lm -lXt -lXmu -lnsl
INCLUDES = -I. -I$(DRIVERS) -I$(COMMON) -I$(FIRMWAREDIR) -I$(APPDIR) -I$(RECDIR)
LIBS =
LIBS = -lpthread
UNAME := $(shell uname)
ifeq ($(UNAME),Linux)
@ -77,7 +77,7 @@ ifeq ($(DISPLAY),-DHAVE_LCD_BITMAP)
endif
SRCS = screenhack.c uibasic.c resources.c visual.c lcd-x11.c mpeg.c \
button-x11.c io.c sleep.c $(APPS) $(FIRMSRCS)
button-x11.c io.c sleep.c thread.c $(APPS) $(FIRMSRCS)
ifdef MPEG_PLAY
SRCS += mpegplay.c oss_sound.c bit.c decoder.c fixed.c frame.c huffman.c layer12.c layer3.c stream.c synth.c timer.c version.c

69
uisimulator/x11/thread.c Normal file
View file

@ -0,0 +1,69 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Daniel Stenberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <pthread.h>
/*
* We emulate the target threads by using pthreads. We have a mutex that only
* allows one thread at a time to execute. It forces each thread to yield()
* for the other(s) to run.
*/
pthread_mutex_t mp;
void init_threads(void)
{
pthread_mutex_init(&mp, NULL);
}
/*
int pthread_create(pthread_t *new_thread_ID,
const pthread_attr_t *attr,
void * (*start_func)(void *), void *arg);
*/
void yield(void)
{
pthread_mutex_unlock(&mp); /* return */
pthread_mutex_lock(&mp); /* get it again */
}
int create_thread(void* fp, void* sp, int stk_size)
{
pthread_t tid;
int i;
int error;
/* we really don't care about these arguments */
(void)sp;
(void)stk_size;
error = pthread_create(&tid,
NULL, /* default attributes please */
fp, /* function to start */
NULL /* start argument */);
if(0 != error)
fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error);
else
fprintf(stderr, "Thread %d is running\n", tid);
/* get mutex to only allow one thread running at a time */
pthread_mutex_lock(&mp);
return error;
}