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More Simulator tweaking. Back to the counter but with 0 delay. Forget the semaphore; it makes for too much kernel thread yielding.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14649 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2007-09-09 08:28:42 +00:00
parent b0a1ed1852
commit 3a45faa6a8
1 changed files with 8 additions and 18 deletions
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26
uisimulator/sdl/thread-sdl.c
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@ -45,7 +45,6 @@ static char __name[32];
struct thread_entry threads[MAXTHREADS]; /* Thread entries as in core */
static SDL_mutex *m;
static SDL_sem *s;
static struct thread_entry *running;
extern long start_tick;
@ -60,9 +59,7 @@ void kill_sim_threads(void)
if (thread->context.t != NULL)
{
SDL_LockMutex(m);
if (thread->statearg == STATE_RUNNING)
SDL_SemPost(s);
else
if (thread->statearg != STATE_RUNNING)
SDL_CondSignal(thread->context.c);
SDL_Delay(10);
SDL_KillThread(thread->context.t);
@ -70,7 +67,6 @@ void kill_sim_threads(void)
}
}
SDL_DestroyMutex(m);
SDL_DestroySemaphore(s);
}
static int find_empty_thread_slot(void)
@ -144,19 +140,20 @@ void thread_sdl_unlock(void)
void switch_thread(bool save_context, struct thread_entry **blocked_list)
{
static int counter = 0;
struct thread_entry *current = running;
SDL_UnlockMutex(m);
SDL_SemWait(s);
SDL_Delay(0);
if (counter++ >= 50)
{
SDL_Delay(0);
counter = 0;
}
SDL_LockMutex(m);
running = current;
SDL_SemPost(s);
(void)save_context; (void)blocked_list;
}
@ -299,7 +296,6 @@ void init_threads(void)
int slot;
m = SDL_CreateMutex();
s = SDL_CreateSemaphore(0);
memset(threads, 0, sizeof(threads));
@ -324,10 +320,6 @@ void init_threads(void)
if (SDL_LockMutex(m) == -1) {
THREAD_PANICF("Couldn't lock mutex\n");
}
if (SDL_SemPost(s) == -1) {
THREAD_PANICF("Couldn't post to semaphore\n");
}
}
void remove_thread(struct thread_entry *thread)
@ -347,9 +339,7 @@ void remove_thread(struct thread_entry *thread)
if (thread != current)
{
if (thread->statearg == STATE_RUNNING)
SDL_SemPost(s);
else
if (thread->statearg != STATE_RUNNING)
SDL_CondSignal(c);
}