e9baf604f9
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13717 a1c6a512-1295-4272-9138-f99709370657
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 Dan Everton
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <time.h>
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#include <SDL.h>
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#include <SDL_thread.h>
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#include <stdlib.h>
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#include "thread-sdl.h"
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#include "kernel.h"
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#include "thread.h"
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#include "debug.h"
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SDL_Thread *threads[256];
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int threadCount = 0;
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volatile long current_tick = 0;
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SDL_mutex *m;
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void yield(void)
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{
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static int counter = 0;
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SDL_mutexV(m);
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if (counter++ >= 50)
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{
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SDL_Delay(1);
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counter = 0;
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}
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SDL_mutexP(m);
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}
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void sim_sleep(int ticks)
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{
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SDL_mutexV(m);
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SDL_Delay((1000/HZ) * ticks);
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SDL_mutexP(m);
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}
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int runthread(void *data)
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{
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SDL_mutexP(m);
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((void(*)())data) ();
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SDL_mutexV(m);
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return 0;
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}
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struct thread_entry*
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create_thread(void (*function)(void), void* stack, int stack_size,
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const char *name)
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{
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/** Avoid compiler warnings */
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(void)stack;
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(void)stack_size;
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(void)name;
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SDL_Thread* t;
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if (threadCount == 256) {
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return NULL;
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}
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t = SDL_CreateThread(runthread, function);
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threads[threadCount++] = t;
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yield();
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/* The return value is never de-referenced outside thread.c so this
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nastiness should be fine. However, a better solution would be nice.
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*/
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return (struct thread_entry*)t;
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}
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void init_threads(void)
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{
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m = SDL_CreateMutex();
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if (SDL_mutexP(m) == -1) {
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fprintf(stderr, "Couldn't lock mutex\n");
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exit(-1);
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}
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}
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void remove_thread(struct thread_entry *thread)
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{
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SDL_KillThread((SDL_Thread*) thread);
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}
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