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64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
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/***
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This file is part of PulseAudio.
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Copyright 2009 Kim Lester <kim@dfusion.com.au>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <Multiprocessing.h>
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#include <pulse/xmalloc.h>
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#include <pulsecore/macro.h>
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#include "semaphore.h"
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struct pa_semaphore
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{
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MPSemaphoreID sema;
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};
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pa_semaphore* pa_semaphore_new(unsigned int value) {
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/* NOTE: Can't assume boolean - ie value = 0,1, so use UINT_MAX (boolean more efficient ?) */
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pa_semaphore *s;
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s = pa_xnew(pa_semaphore, 1);
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pa_assert_se(MPCreateSemaphore(UINT_MAX, value, &s->sema) == 0);
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return s;
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}
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void pa_semaphore_free(pa_semaphore *s) {
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pa_assert(s);
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pa_assert_se(MPDeleteSemaphore(s->sema) == 0);
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pa_xfree(s);
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}
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void pa_semaphore_post(pa_semaphore *s) {
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pa_assert(s);
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pa_assert_se(MPSignalSemaphore(s->sema) == 0);
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}
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void pa_semaphore_wait(pa_semaphore *s) {
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pa_assert(s);
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/* should probably check return value (-ve is error), noErr is ok. */
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pa_assert_se(MPWaitOnSemaphore(s->sema, kDurationForever) == 0);
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}
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