UISIMULATOR: Give the host OS some needed context switching hints (which _is_ supposed to work on Linux - but I can't tell on VMWare - and does on Windows). I guess I'll know for sure soon. Give sleep() even more genuine behavior. Add some button driver sync with the rockbox threads that should have been there for some time - this is basically interrupt-like processing as any thread not in the kernel pool should be considered. Make the screendump work again by posting the request. Perhaps help out shutting down for some users but not in the way I'd prefer - to think about.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14646 a1c6a512-1295-4272-9138-f99709370657

firmware/backlight.c

@@ -487,7 +487,12 @@ void backlight_thread(void)
                 lcd_remote_off();
                 break;
 #endif /* defined(HAVE_REMOTE_LCD) && !defined(SIMULATOR) */
-
+#ifdef SIMULATOR
+            /* This one here too for lack of a better place */
+            case SYS_SCREENDUMP:
+                screen_dump();
+                break;
+#endif
             case SYS_USB_CONNECTED:
                 /* Tell the USB thread that we are safe */
                 DEBUGF("backlight_thread got SYS_USB_CONNECTED\n");

firmware/export/kernel.h

@@ -41,6 +41,7 @@
 #define SYS_EVENT_CLS_POWER   2
 #define SYS_EVENT_CLS_FILESYS 3
 #define SYS_EVENT_CLS_PLUG    4
+#define SYS_EVENT_CLS_MISC    5
 /* make sure SYS_EVENT_CLS_BITS has enough range */
 
 /* Bit 31->|S|c...c|i...i| */
@@ -68,6 +69,7 @@
 #define SYS_PHONE_UNPLUGGED       MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 3)
 #define SYS_REMOTE_PLUGGED        MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 4)
 #define SYS_REMOTE_UNPLUGGED      MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 5)
+#define SYS_SCREENDUMP            MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 0)
 
 struct event
 {

uisimulator/common/io.c

@@ -261,7 +261,8 @@ void sim_io_init(void)
     }
 
     /* Wait for IO thread to lock mutex */
-    while (!io.ready);
+    while (!io.ready)
+        SDL_Delay(0);
 
     /* Wait for it to unlock */
     SDL_LockMutex(io.m);

uisimulator/sdl/button.c

@@ -30,6 +30,11 @@
 
 static intptr_t button_data; /* data value from last message dequeued */
 
+/* Special thread-synced queue_post for button driver or any other preemptive sim thread */
+extern void queue_syncpost(struct event_queue *q, long id, intptr_t data);
+/* Special thread-synced queue_broadcast for button driver or any other preemptive sim thread */
+extern int queue_syncbroadcast(long id, intptr_t data);
+
 /* how long until repeat kicks in */
 #define REPEAT_START      6
 
@@ -110,9 +115,9 @@ void button_event(int key, bool pressed)
         {
             usb_connected = !usb_connected;
             if (usb_connected)
-                queue_post(&button_queue, SYS_USB_CONNECTED, 0);
+                queue_syncpost(&button_queue, SYS_USB_CONNECTED, 0);
             else
-                queue_post(&button_queue, SYS_USB_DISCONNECTED, 0);
+                queue_syncpost(&button_queue, SYS_USB_DISCONNECTED, 0);
         }
         return;
 
@@ -590,7 +595,7 @@ void button_event(int key, bool pressed)
     case SDLK_F5:
         if(pressed)
         {
-            screen_dump();
+            queue_syncbroadcast(SYS_SCREENDUMP, 0);
             return;
         }
         break;
@@ -611,17 +616,17 @@ void button_event(int key, bool pressed)
 #ifdef HAVE_REMOTE_LCD
         if(diff & BUTTON_REMOTE)
             if(!skip_remote_release)
-                queue_post(&button_queue, BUTTON_REL | diff, 0);
+                queue_syncpost(&button_queue, BUTTON_REL | diff, 0);
             else
                 skip_remote_release = false;
         else
 #endif
             if(!skip_release)
-                queue_post(&button_queue, BUTTON_REL | diff, 0);
+                queue_syncpost(&button_queue, BUTTON_REL | diff, 0);
             else
                 skip_release = false;
 #else
-        queue_post(&button_queue, BUTTON_REL | diff, 0);
+        queue_syncpost(&button_queue, BUTTON_REL | diff, 0);
 #endif
     }
 
@@ -673,7 +678,7 @@ void button_event(int key, bool pressed)
                 {
                     if (queue_empty(&button_queue))
                     {
-                        queue_post(&button_queue, BUTTON_REPEAT | btn, 0);
+                        queue_syncpost(&button_queue, BUTTON_REPEAT | btn, 0);
 #ifdef HAVE_BACKLIGHT
 #ifdef HAVE_REMOTE_LCD
                             if(btn & BUTTON_REMOTE)
@@ -695,18 +700,18 @@ void button_event(int key, bool pressed)
 #ifdef HAVE_REMOTE_LCD
                         if (btn & BUTTON_REMOTE) {
                             if (!remote_filter_first_keypress || is_remote_backlight_on())
-                                queue_post(&button_queue, btn, 0);
+                                queue_syncpost(&button_queue, btn, 0);
                             else
                                 skip_remote_release = true;
                         }
                         else
 #endif                                    
                             if (!filter_first_keypress || is_backlight_on())
-                                queue_post(&button_queue, btn, 0);
+                                queue_syncpost(&button_queue, btn, 0);
                             else
                                 skip_release = true;
 #else /* no backlight, nothing to skip */
-                        queue_post(&button_queue, btn, 0);
+                        queue_syncpost(&button_queue, btn, 0);
 #endif
                     post = false;
                 }    

uisimulator/sdl/kernel.c

@@ -225,6 +225,15 @@ void queue_post(struct event_queue *q, long id, intptr_t data)
     wakeup_thread(&q->thread);
 }
 
+/* Special thread-synced queue_post for button driver or any other preemptive sim thread */
+void queue_syncpost(struct event_queue *q, long id, intptr_t data)
+{
+    thread_sdl_lock();
+    /* No rockbox threads can be running here */
+    queue_post(q, id, data);
+    thread_sdl_unlock();
+}
+
 #ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
 intptr_t queue_send(struct event_queue *q, long id, intptr_t data)
 {
@@ -332,6 +341,17 @@ int queue_broadcast(long id, intptr_t data)
     return num_queues;
 }
 
+/* Special thread-synced queue_broadcast for button driver or any other preemptive sim thread */
+int queue_syncbroadcast(long id, intptr_t data)
+{
+    int i;
+    thread_sdl_lock();
+    /* No rockbox threads can be running here */
+    i = queue_broadcast(id, data);
+    thread_sdl_unlock();
+    return i;
+}
+
 void yield(void)
 {
     switch_thread(true, NULL);

uisimulator/sdl/thread-sdl.c

@@ -48,6 +48,8 @@ static SDL_mutex *m;
 static SDL_sem *s;
 static struct thread_entry *running;
 
+extern long start_tick;
+
 void kill_sim_threads(void)
 {
     int i;
@@ -62,6 +64,7 @@ void kill_sim_threads(void)
                 SDL_SemPost(s);
             else
                 SDL_CondSignal(thread->context.c);
+            SDL_Delay(10);
             SDL_KillThread(thread->context.t);
             SDL_DestroyCond(thread->context.c);
         }
@@ -129,6 +132,16 @@ struct thread_entry *thread_get_current(void)
     return running;
 }
 
+void thread_sdl_lock(void)
+{
+    SDL_LockMutex(m);
+}
+
+void thread_sdl_unlock(void)
+{
+    SDL_UnlockMutex(m);
+}
+
 void switch_thread(bool save_context, struct thread_entry **blocked_list)
 {
     struct thread_entry *current = running;
@@ -137,6 +150,8 @@ void switch_thread(bool save_context, struct thread_entry **blocked_list)
 
     SDL_SemWait(s);
 
+    SDL_Delay(0);
+
     SDL_LockMutex(m);
     running = current;
 
@@ -148,11 +163,19 @@ void switch_thread(bool save_context, struct thread_entry **blocked_list)
 void sleep_thread(int ticks)
 {
     struct thread_entry *current;
+    int rem;
 
     current = running;
     current->statearg = STATE_SLEEPING;
 
-    SDL_CondWaitTimeout(current->context.c, m, (1000/HZ) * ticks + (500/HZ));
+    rem = (SDL_GetTicks() - start_tick) % (1000/HZ);
+    if (rem < 0)
+        rem = 0;
+
+    SDL_UnlockMutex(m);
+    SDL_Delay((1000/HZ) * ticks + ((1000/HZ)-1) - rem);
+    SDL_LockMutex(m);
+
     running = current;
 
     current->statearg = STATE_RUNNING;

uisimulator/sdl/thread-sdl.h

@@ -24,6 +24,8 @@
 
 extern SDL_Thread *gui_thread;   /* The "main" thread */
 void kill_sim_threads();         /* Kill all the rockbox sim threads */
+void thread_sdl_lock(void); /* Sync with SDL threads */
+void thread_sdl_unlock(void); /* Sync with SDL threads */
 
 #endif /* #ifndef __THREADSDL_H__ */
 

uisimulator/sdl/uisdl.c

@@ -41,8 +41,8 @@
 extern void                 app_main (void *); /* mod entry point */
 extern void                 new_key(int key);
 extern void                 sim_tick_tasks(void);
-extern void sim_io_init(void);
+extern void                 sim_io_init(void);
-extern void sim_io_shutdown(void);
+extern void                 sim_io_shutdown(void);
 
 void button_event(int key, bool pressed);
 
@@ -69,7 +69,7 @@ Uint32 tick_timer(Uint32 interval, void *param)
     (void) interval;
     (void) param;
     
-    new_tick = (SDL_GetTicks() - start_tick) * HZ / 1000;
+    new_tick = (SDL_GetTicks() - start_tick) / (1000/HZ);
         
     if (new_tick != current_tick) {
         long i;