2 This file is part of PulseAudio.
4 Copyright 2006 Lennart Poettering
5 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published
9 by the Free Software Foundation; either version 2 of the License,
10 or (at your option) any later version.
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
31 #include <pulse/xmalloc.h>
32 #include <pulsecore/mutex.h>
33 #include <pulsecore/once.h>
34 #include <pulsecore/atomic.h>
35 #include <pulsecore/macro.h>
41 pa_thread_func_t thread_func
;
51 static void thread_free_cb(void *p
) {
57 /* This is a foreign thread, we need to free the struct */
61 PA_STATIC_TLS_DECLARE(current_thread
, thread_free_cb
);
63 static void* internal_thread_func(void *userdata
) {
64 pa_thread
*t
= userdata
;
67 t
->id
= pthread_self();
69 PA_STATIC_TLS_SET(current_thread
, t
);
71 pa_atomic_inc(&t
->running
);
72 t
->thread_func(t
->userdata
);
73 pa_atomic_sub(&t
->running
, 2);
78 pa_thread
* pa_thread_new(pa_thread_func_t thread_func
, void *userdata
) {
81 pa_assert(thread_func
);
83 t
= pa_xnew(pa_thread
, 1);
84 t
->thread_func
= thread_func
;
85 t
->userdata
= userdata
;
87 pa_atomic_store(&t
->running
, 0);
89 if (pthread_create(&t
->id
, NULL
, internal_thread_func
, t
) < 0) {
94 pa_atomic_inc(&t
->running
);
99 int pa_thread_is_running(pa_thread
*t
) {
102 /* Unfortunately there is no way to tell whether a "foreign"
103 * thread is still running. See
104 * http://udrepper.livejournal.com/16844.html for more
106 pa_assert(t
->thread_func
);
108 return pa_atomic_load(&t
->running
) > 0;
111 void pa_thread_free(pa_thread
*t
) {
118 int pa_thread_join(pa_thread
*t
) {
120 pa_assert(t
->thread_func
);
126 return pthread_join(t
->id
, NULL
);
129 pa_thread
* pa_thread_self(void) {
132 if ((t
= PA_STATIC_TLS_GET(current_thread
)))
135 /* This is a foreign thread, let's create a pthread structure to
136 * make sure that we can always return a sensible pointer */
138 t
= pa_xnew(pa_thread
, 1);
139 t
->id
= pthread_self();
140 t
->thread_func
= NULL
;
143 pa_atomic_store(&t
->running
, 2);
145 PA_STATIC_TLS_SET(current_thread
, t
);
150 void* pa_thread_get_data(pa_thread
*t
) {
156 void pa_thread_set_data(pa_thread
*t
, void *userdata
) {
159 t
->userdata
= userdata
;
162 void pa_thread_yield(void) {
163 #ifdef HAVE_PTHREAD_YIELD
166 pa_assert_se(sched_yield() == 0);
170 pa_tls
* pa_tls_new(pa_free_cb_t free_cb
) {
173 t
= pa_xnew(pa_tls
, 1);
175 if (pthread_key_create(&t
->key
, free_cb
) < 0) {
183 void pa_tls_free(pa_tls
*t
) {
186 pa_assert_se(pthread_key_delete(t
->key
) == 0);
190 void *pa_tls_get(pa_tls
*t
) {
193 return pthread_getspecific(t
->key
);
196 void *pa_tls_set(pa_tls
*t
, void *userdata
) {
199 r
= pthread_getspecific(t
->key
);
200 pa_assert_se(pthread_setspecific(t
->key
, userdata
) == 0);