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,
+ by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
pa_assert(ret == 0);
}
+
+pa_semaphore* pa_static_semaphore_get(pa_static_semaphore *s, unsigned value) {
+ pa_semaphore *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_semaphore_new(value);
+ if ((pa_atomic_ptr_cmpxchg(&s->ptr, NULL, m)))
+ return m;
+
+ pa_semaphore_free(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;
+}