2 This file is part of PulseAudio.
4 Copyright 2009 Kim Lester <kim@dfusion.com.au>
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2.1 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
26 #include <Multiprocessing.h>
28 #include <pulse/xmalloc.h>
29 #include <pulsecore/macro.h>
31 #include "semaphore.h"
38 pa_semaphore* pa_semaphore_new(unsigned int value) {
39 /* NOTE: Can't assume boolean - ie value = 0,1, so use UINT_MAX (boolean more efficient ?) */
42 s = pa_xnew(pa_semaphore, 1);
43 pa_assert_se(MPCreateSemaphore(UINT_MAX, value, &s->sema) == 0);
48 void pa_semaphore_free(pa_semaphore *s) {
50 pa_assert_se(MPDeleteSemaphore(s->sema) == 0);
54 void pa_semaphore_post(pa_semaphore *s) {
56 pa_assert_se(MPSignalSemaphore(s->sema) == 0);
59 void pa_semaphore_wait(pa_semaphore *s) {
61 /* should probably check return value (-ve is error), noErr is ok. */
62 pa_assert_se(MPWaitOnSemaphore(s->sema, kDurationForever) == 0);