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/* $Id$ */
/***
This file is part of PulseAudio.
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
PulseAudio 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 Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <pthread.h>
#include <atomic_ops.h>
#include <pulse/xmalloc.h>
#include "thread.h"
#define ASSERT_SUCCESS(x) do { \
int _r = (x); \
assert(_r == 0); \
} while(0)
struct pa_thread {
pthread_t id;
pa_thread_func_t thread_func;
void *userdata;
AO_t running;
};
struct pa_tls {
pthread_key_t key;
};
static pa_tls *thread_tls;
static pthread_once_t thread_tls_once = PTHREAD_ONCE_INIT;
static void thread_tls_once_func(void) {
thread_tls = pa_tls_new(NULL);
assert(thread_tls);
}
static void* internal_thread_func(void *userdata) {
pa_thread *t = userdata;
assert(t);
t->id = pthread_self();
ASSERT_SUCCESS(pthread_once(&thread_tls_once, thread_tls_once_func));
pa_tls_set(thread_tls, t);
AO_store_release_write(&t->running, 1);
t->thread_func(t->userdata);
AO_store_release_write(&t->running, 0);
return NULL;
}
pa_thread* pa_thread_new(pa_thread_func_t thread_func, void *userdata) {
pa_thread *t;
t = pa_xnew(pa_thread, 1);
t->thread_func = thread_func;
t->userdata = userdata;
if (pthread_create(&t->id, NULL, internal_thread_func, t) < 0) {
pa_xfree(t);
return NULL;
}
return t;
}
int pa_thread_is_running(pa_thread *t) {
assert(t);
return !!AO_load_acquire_read(&t->running);
}
void pa_thread_free(pa_thread *t) {
assert(t);
pa_thread_join(t);
pa_xfree(t);
}
int pa_thread_join(pa_thread *t) {
assert(t);
return pthread_join(t->id, NULL);
}
pa_thread* pa_thread_self(void) {
ASSERT_SUCCESS(pthread_once(&thread_tls_once, thread_tls_once_func));
return pa_tls_get(thread_tls);
}
pa_tls* pa_tls_new(pa_free_cb_t free_cb) {
pa_tls *t;
t = pa_xnew(pa_tls, 1);
if (pthread_key_create(&t->key, free_cb) < 0) {
pa_xfree(t);
return NULL;
}
return t;
}
void pa_tls_free(pa_tls *t) {
assert(t);
ASSERT_SUCCESS(pthread_key_delete(t->key));
pa_xfree(t);
}
void *pa_tls_get(pa_tls *t) {
assert(t);
return pthread_getspecific(t->key);
}
void *pa_tls_set(pa_tls *t, void *userdata) {
void *r;
r = pthread_getspecific(t->key);
ASSERT_SUCCESS(pthread_setspecific(t->key, userdata));
return r;
}
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