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If PTHREAD_PRIO_INHERIT mutexes are not available fall back to normal mutexes

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1856 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-09-18 19:51:26 +00:00
parent a558e9312e
commit ca717643ee
1 changed files with 22 additions and 2 deletions
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24
src/pulsecore/mutex-posix.c
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@ -26,9 +26,12 @@
#endif
#include <pthread.h>
#include <errno.h>
#include <pulse/xmalloc.h>
#include <pulsecore/macro.h>
#include <pulsecore/log.h>
#include <pulsecore/core-error.h>
#include "mutex.h"
@ -43,19 +46,36 @@ struct pa_cond {
pa_mutex* pa_mutex_new(pa_bool_t recursive, pa_bool_t inherit_priority) {
pa_mutex *m;
pthread_mutexattr_t attr;
int r;
pthread_mutexattr_init(&attr);
pa_assert_se(pthread_mutexattr_init(&attr) == 0);
if (recursive)
pa_assert_se(pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) == 0);
#ifdef HAVE_PTHREAD_PRIO_INHERIT
if (inherit_priority)
pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
pa_assert_se(pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT) == 0);
#endif
m = pa_xnew(pa_mutex, 1);
#ifndef HAVE_PTHREAD_PRIO_INHERIT
pa_assert_se(pthread_mutex_init(&m->mutex, &attr) == 0);
#else
if ((r = pthread_mutex_init(&m->mutex, &attr))) {
/* If this failed, then this was probably due to non-available
* priority inheritance. In which case we fall back to normal
* mutexes. */
pa_assert(r == ENOTSUP && inherit_priority);
pa_assert_se(pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_NONE) == 0);
pa_assert_se(pthread_mutex_init(&m->mutex, &attr) == 0);
}
#endif
return m;
}