101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* src/thr-linux.c: Thread functions for Linux
|
|
Copyright 2010 Andrew Church
|
|
|
|
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 <errno.h>
|
|
#include <pthread.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Thread handles for each Yabause subthread
|
|
static pthread_t thread_handle[YAB_NUM_THREADS];
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static void dummy_sighandler(int signum_unused) {} // For thread sleep/wake
|
|
|
|
int YabThreadStart(unsigned int id, void (*func)(void))
|
|
{
|
|
// Set up a dummy signal handler for SIGUSR1 so we can return from pause()
|
|
// in YabThreadSleep()
|
|
static const struct sigaction sa = {.sa_handler = dummy_sighandler};
|
|
if (sigaction(SIGUSR1, &sa, NULL) != 0)
|
|
{
|
|
perror("sigaction(SIGUSR1)");
|
|
return -1;
|
|
}
|
|
|
|
if (thread_handle[id])
|
|
{
|
|
fprintf(stderr, "YabThreadStart: thread %u is already started!\n", id);
|
|
return -1;
|
|
}
|
|
|
|
if ((errno = pthread_create(&thread_handle[id], NULL, (void *)func, NULL)) != 0)
|
|
{
|
|
perror("pthread_create");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void YabThreadWait(unsigned int id)
|
|
{
|
|
if (!thread_handle[id])
|
|
return; // Thread wasn't running in the first place
|
|
|
|
pthread_join(thread_handle[id], NULL);
|
|
|
|
thread_handle[id] = 0;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void YabThreadYield(void)
|
|
{
|
|
sched_yield();
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void YabThreadSleep(void)
|
|
{
|
|
pause();
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void YabThreadWake(unsigned int id)
|
|
{
|
|
if (!thread_handle[id])
|
|
return; // Thread isn't running
|
|
|
|
pthread_kill(thread_handle[id], SIGUSR1);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|