mirrors/pulseaudio
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git synced 2025-11-01 22:58:47 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

add support for static mutexes

Browse source
This commit is contained in:
Lennart Poettering 2009-01-23 23:57:47 +01:00
parent db27c6347e
commit e960125011
2 changed files with 27 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

20
src/pulsecore/mutex-posix.c
View file

@ -138,3 +138,23 @@ int pa_cond_wait(pa_cond *c, pa_mutex *m) {
return pthread_cond_wait(&c->cond, &m->mutex);
}
pa_mutex* pa_static_mutex_get(pa_static_mutex *s, pa_bool_t recursive, pa_bool_t inherit_priority) {
pa_mutex *m;
pa_assert(s);
/* First, check if already initialized and short cut */
if ((m = pa_atomic_ptr_load(&s->ptr)))
return m;
/* OK, not initialized, so let's allocate, and fill in */
m = pa_mutex_new(recursive, inherit_priority);
if ((pa_atomic_ptr_cmpxchg(&s->ptr, NULL, m)))
return m;
/* Him, filling in failed, so someone else must have filled in
* already */
pa_assert_se(m = pa_atomic_ptr_load(&s->ptr));
return m;
}

7
src/pulsecore/mutex.h
View file

@ -23,6 +23,7 @@
***/
#include <pulsecore/macro.h>
#include <pulsecore/atomic.h>
typedef struct pa_mutex pa_mutex;
@ -45,4 +46,10 @@ void pa_cond_free(pa_cond *c);
void pa_cond_signal(pa_cond *c, int broadcast);
int pa_cond_wait(pa_cond *c, pa_mutex *m);
typedef struct pa_static_mutex {
pa_atomic_ptr_t ptr;
} pa_static_mutex;
pa_mutex* pa_static_mutex_get(pa_static_mutex *m, pa_bool_t recursive, pa_bool_t inherit_priority);
#endif