129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/* Copyright 2010 Lawrence Sebald
|
|
|
|
This file is part of Yabause.
|
|
|
|
Yabause is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Yabause is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Yabause; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "core.h"
|
|
#include "threads.h"
|
|
|
|
#include <pthread.h>
|
|
#include <sched.h>
|
|
|
|
/* Thread handle structure. */
|
|
struct thd_s {
|
|
int running;
|
|
pthread_t thd;
|
|
void (*func)(void);
|
|
pthread_mutex_t mutex;
|
|
pthread_cond_t cond;
|
|
};
|
|
|
|
static struct thd_s thread_handle[YAB_NUM_THREADS];
|
|
static pthread_key_t hnd_key;
|
|
static pthread_once_t hnd_key_once;
|
|
|
|
static void make_key() {
|
|
pthread_key_create(&hnd_key, NULL);
|
|
}
|
|
|
|
static void *wrapper(void *hnd) {
|
|
struct thd_s *hnds = (struct thd_s *)hnd;
|
|
|
|
pthread_mutex_lock(&hnds->mutex);
|
|
|
|
/* Set the handle for the thread, and call the actual thread function. */
|
|
pthread_setspecific(hnd_key, hnd);
|
|
hnds->func();
|
|
|
|
pthread_mutex_unlock(&hnds->mutex);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int YabThreadStart(unsigned int id, void (*func)(void)) {
|
|
/* Create the key to access the thread handle if we haven't made it yet. */
|
|
pthread_once(&hnd_key_once, make_key);
|
|
|
|
/* Make sure we aren't trying to start a thread twice. */
|
|
if(thread_handle[id].running) {
|
|
fprintf(stderr, "YabThreadStart: Thread %u is already started!\n", id);
|
|
return -1;
|
|
}
|
|
|
|
/* Create the mutex and condvar for the thread. */
|
|
if(pthread_mutex_init(&thread_handle[id].mutex, NULL)) {
|
|
fprintf(stderr, "YabThreadStart: Error creating mutex\n");
|
|
return -1;
|
|
}
|
|
|
|
if(pthread_cond_init(&thread_handle[id].cond, NULL)) {
|
|
fprintf(stderr, "YabThreadStart: Error creating condvar\n");
|
|
pthread_mutex_destroy(&thread_handle[id].mutex);
|
|
return -1;
|
|
}
|
|
|
|
thread_handle[id].func = func;
|
|
|
|
/* Create the thread. */
|
|
if(pthread_create(&thread_handle[id].thd, NULL, wrapper,
|
|
&thread_handle[id])) {
|
|
fprintf(stderr, "YabThreadStart: Couldn't start thread\n");
|
|
pthread_cond_destroy(&thread_handle[id].cond);
|
|
pthread_mutex_destroy(&thread_handle[id].mutex);
|
|
return -1;
|
|
}
|
|
|
|
thread_handle[id].running = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void YabThreadWait(unsigned int id) {
|
|
/* Make sure the thread is running. */
|
|
if(!thread_handle[id].running)
|
|
return;
|
|
|
|
/* Join the thread to wait for it to finish. */
|
|
pthread_join(thread_handle[id].thd, NULL);
|
|
|
|
/* Cleanup... */
|
|
pthread_cond_destroy(&thread_handle[id].cond);
|
|
pthread_mutex_destroy(&thread_handle[id].mutex);
|
|
thread_handle[id].thd = NULL;
|
|
thread_handle[id].func = NULL;
|
|
|
|
thread_handle[id].running = 0;
|
|
}
|
|
|
|
void YabThreadYield(void) {
|
|
sched_yield();
|
|
}
|
|
|
|
void YabThreadSleep(void) {
|
|
struct thd_s *thd = (struct thd_s *)pthread_getspecific(hnd_key);
|
|
|
|
/* Wait on the condvar... */
|
|
pthread_cond_wait(&thd->cond, &thd->mutex);
|
|
}
|
|
|
|
void YabThreadWake(unsigned int id) {
|
|
if(!thread_handle[id].running)
|
|
return;
|
|
|
|
pthread_cond_signal(&thread_handle[id].cond);
|
|
}
|