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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Dan Everton
*
* 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 <time.h>
#include <SDL.h>
#include <SDL_thread.h>
#include <stdlib.h>
#include "thread-sdl.h"
#include "kernel.h"
#include "debug.h"
SDL_Thread *threads[256];
int threadCount = 0;
long current_tick = 0;
SDL_mutex *m;
void yield(void)
{
static int counter = 0;
SDL_mutexV(m);
if (counter++ >= 50)
{
SDL_Delay(1);
counter = 0;
}
SDL_mutexP(m);
}
void sim_sleep(int ticks)
{
SDL_mutexV(m);
SDL_Delay((1000/HZ) * ticks);
SDL_mutexP(m);
}
int runthread(void *data)
{
SDL_mutexP(m);
((void(*)())data) ();
SDL_mutexV(m);
return 0;
}
int create_thread(void (*fp)(void), void* sp, int stk_size)
{
/** Avoid compiler warnings */
(void)sp;
(void)stk_size;
if (threadCount == 256) {
return -1;
}
threads[threadCount++] = SDL_CreateThread(runthread, fp);
yield();
return 0;
}
int create_thread_on_core(void (*core)(void), void (*fp)(void), void* sp, int stk_size)
{
(void)core;
return create_thread(fp, sp, stk_size);
}
void init_threads(void)
{
m = SDL_CreateMutex();
if (SDL_mutexP(m) == -1) {
fprintf(stderr, "Couldn't lock mutex\n");
exit(-1);
}
}
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