diff options
author | Lennart Poettering <lennart@poettering.net> | 2009-01-23 23:57:47 +0100 |
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committer | Lennart Poettering <lennart@poettering.net> | 2009-01-23 23:57:47 +0100 |
commit | e9601250110decc8f4323c76be8549acff091966 (patch) | |
tree | 7a2ab72fd7e69e6c5696a790597dfcee2cf04e63 /src/pulsecore/mutex-posix.c | |
parent | db27c6347ebe3316bb5f80518c6cc86eea67779b (diff) |
add support for static mutexes
Diffstat (limited to 'src/pulsecore/mutex-posix.c')
-rw-r--r-- | src/pulsecore/mutex-posix.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/pulsecore/mutex-posix.c b/src/pulsecore/mutex-posix.c index 35465b7b..c3ead97d 100644 --- a/src/pulsecore/mutex-posix.c +++ b/src/pulsecore/mutex-posix.c @@ -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; +} |