1 files changed, 60 insertions, 32 deletions

diff --git a/src/pulsecore/mutex-posix.c b/src/pulsecore/mutex-posix.c
index 094d637d..35465b7b 100644
--- a/src/pulsecore/mutex-posix.c
+++ b/src/pulsecore/mutex-posix.c
@@ -1,18 +1,18 @@
-/* $Id$ */
-
 /***
   This file is part of PulseAudio.
- 
+
+  Copyright 2006 Lennart Poettering
+
   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 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
@@ -23,20 +23,16 @@
 #include <config.h>
 #endif
 
-#include <assert.h>
 #include <pthread.h>
-
-#include <atomic_ops.h>
+#include <errno.h>
 
 #include <pulse/xmalloc.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/log.h>
+#include <pulsecore/core-error.h>
 
 #include "mutex.h"
 
-#define ASSERT_SUCCESS(x) do { \
-    int _r = (x); \
-    assert(_r == 0); \
-} while(0)
-
 struct pa_mutex {
     pthread_mutex_t mutex;
 };
@@ -45,68 +41,100 @@ struct pa_cond {
     pthread_cond_t cond;
 };
 
-pa_mutex* pa_mutex_new(int recursive) {
+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)
-        ASSERT_SUCCESS(pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE));
+        pa_assert_se(pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) == 0);
+
+#ifdef HAVE_PTHREAD_PRIO_INHERIT
+    if (inherit_priority)
+        pa_assert_se(pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT) == 0);
+#endif
 
     m = pa_xnew(pa_mutex, 1);
 
-    ASSERT_SUCCESS(pthread_mutex_init(&m->mutex, &attr));
+#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;
 }
 
 void pa_mutex_free(pa_mutex *m) {
-    assert(m);
+    pa_assert(m);
 
-    ASSERT_SUCCESS(pthread_mutex_destroy(&m->mutex));
+    pa_assert_se(pthread_mutex_destroy(&m->mutex) == 0);
     pa_xfree(m);
 }
 
 void pa_mutex_lock(pa_mutex *m) {
-    assert(m);
+    pa_assert(m);
 
-    ASSERT_SUCCESS(pthread_mutex_lock(&m->mutex));
+    pa_assert_se(pthread_mutex_lock(&m->mutex) == 0);
+}
+
+pa_bool_t pa_mutex_try_lock(pa_mutex *m) {
+    int r;
+    pa_assert(m);
+
+    if ((r = pthread_mutex_trylock(&m->mutex)) != 0) {
+        pa_assert(r == EBUSY);
+        return FALSE;
+    }
+
+    return TRUE;
 }
 
 void pa_mutex_unlock(pa_mutex *m) {
-    assert(m);
+    pa_assert(m);
 
-    ASSERT_SUCCESS(pthread_mutex_unlock(&m->mutex));
+    pa_assert_se(pthread_mutex_unlock(&m->mutex) == 0);
 }
 
 pa_cond *pa_cond_new(void) {
     pa_cond *c;
 
     c = pa_xnew(pa_cond, 1);
-
-    ASSERT_SUCCESS(pthread_cond_init(&c->cond, NULL));
+    pa_assert_se(pthread_cond_init(&c->cond, NULL) == 0);
     return c;
 }
 
 void pa_cond_free(pa_cond *c) {
-    assert(c);
+    pa_assert(c);
 
-    ASSERT_SUCCESS(pthread_cond_destroy(&c->cond));
+    pa_assert_se(pthread_cond_destroy(&c->cond) == 0);
     pa_xfree(c);
 }
 
 void pa_cond_signal(pa_cond *c, int broadcast) {
-    assert(c);
+    pa_assert(c);
 
     if (broadcast)
-        ASSERT_SUCCESS(pthread_cond_broadcast(&c->cond));
+        pa_assert_se(pthread_cond_broadcast(&c->cond) == 0);
     else
-        ASSERT_SUCCESS(pthread_cond_signal(&c->cond));
+        pa_assert_se(pthread_cond_signal(&c->cond) == 0);
 }
 
 int pa_cond_wait(pa_cond *c, pa_mutex *m) {
-    assert(c);
-    assert(m);
+    pa_assert(c);
+    pa_assert(m);
 
     return pthread_cond_wait(&c->cond, &m->mutex);
 }