1 files changed, 92 insertions, 0 deletions
diff --git a/src/pulsecore/semaphore-osx.c b/src/pulsecore/semaphore-osx.c
new file mode 100644
index 0000000..c957f26
--- /dev/null
+++ b/src/pulsecore/semaphore-osx.c
@@ -0,0 +1,92 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2006 Lennart Poettering
+  Copyright 2013 Albert Zeyer
+
+  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, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <pulse/xmalloc.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/atomic.h>
+#include <pulsecore/core-util.h>
+
+#include "semaphore.h"
+
+/* OSX doesn't support unnamed semaphores (via sem_init).
+ * Thus, we use a counter to give them enumerated names. */
+static pa_atomic_t id_counter = PA_ATOMIC_INIT(0);
+
+struct pa_semaphore {
+    sem_t *sem;
+    int id;
+};
+
+static char *sem_name(char *fn, size_t l, int id) {
+    pa_snprintf(fn, l, "/pulse-sem-%u-%u", getpid(), id);
+    return fn;
+}
+
+pa_semaphore *pa_semaphore_new(unsigned value) {
+    pa_semaphore *s;
+    char fn[32];
+
+    s = pa_xnew(pa_semaphore, 1);
+    s->id = pa_atomic_inc(&id_counter);
+    sem_name(fn, sizeof(fn), s->id);
+    sem_unlink(fn); /* in case an old stale semaphore is left around */
+    pa_assert_se(s->sem = sem_open(fn, O_CREAT|O_EXCL, 0700, value));
+    pa_assert(s->sem != SEM_FAILED);
+    return s;
+}
+
+void pa_semaphore_free(pa_semaphore *s) {
+    char fn[32];
+
+    pa_assert(s);
+
+    pa_assert_se(sem_close(s->sem) == 0);
+    sem_name(fn, sizeof(fn), s->id);
+    pa_assert_se(sem_unlink(fn) == 0);
+    pa_xfree(s);
+}
+
+void pa_semaphore_post(pa_semaphore *s) {
+    pa_assert(s);
+    pa_assert_se(sem_post(s->sem) == 0);
+}
+
+void pa_semaphore_wait(pa_semaphore *s) {
+    int ret;
+
+    pa_assert(s);
+
+    do {
+        ret = sem_wait(s->sem);
+    } while (ret < 0 && errno == EINTR);
+
+    pa_assert(ret == 0);
+}