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