1#ifndef foopulsesemaphorehfoo
2#define foopulsesemaphorehfoo
3
4/***
5  This file is part of PulseAudio.
6
7  Copyright 2006 Lennart Poettering
8
9  PulseAudio is free software; you can redistribute it and/or modify
10  it under the terms of the GNU Lesser General Public License as
11  published by the Free Software Foundation; either version 2.1 of the
12  License, or (at your option) any later version.
13
14  PulseAudio is distributed in the hope that it will be useful, but
15  WITHOUT ANY WARRANTY; without even the implied warranty of
16  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  General Public License for more details.
18
19  You should have received a copy of the GNU Lesser General Public
20  License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
21***/
22
23#include <pulsecore/macro.h>
24#include <pulsecore/atomic.h>
25
26typedef struct pa_semaphore pa_semaphore;
27
28pa_semaphore* pa_semaphore_new(unsigned value);
29void pa_semaphore_free(pa_semaphore *m);
30
31void pa_semaphore_post(pa_semaphore *m);
32void pa_semaphore_wait(pa_semaphore *m);
33
34/* Static semaphores are basically just atomically updated pointers to
35 * pa_semaphore objects */
36
37typedef struct pa_static_semaphore {
38    pa_atomic_ptr_t ptr;
39} pa_static_semaphore;
40
41#define PA_STATIC_SEMAPHORE_INIT { PA_ATOMIC_PTR_INIT(NULL) }
42
43/* When you call this make sure to pass always the same value parameter! */
44pa_semaphore* pa_static_semaphore_get(pa_static_semaphore *m, unsigned value);
45
46#endif
47