really create glitch-free branch

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2120 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 69 insertions, 0 deletions

diff --git a/src/pulsecore/semaphore-posix.c b/src/pulsecore/semaphore-posix.c
new file mode 100644
index 00000000..750c2afc
--- /dev/null
+++ b/src/pulsecore/semaphore-posix.c
@@ -0,0 +1,69 @@
+/* $Id$ */
+
+/***
+  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
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <pthread.h>
+#include <semaphore.h>
+
+#include <pulse/xmalloc.h>
+#include <pulsecore/macro.h>
+
+#include "semaphore.h"
+
+struct pa_semaphore {
+    sem_t sem;
+};
+
+pa_semaphore* pa_semaphore_new(unsigned value) {
+    pa_semaphore *s;
+
+    s = pa_xnew(pa_semaphore, 1);
+    pa_assert_se(sem_init(&s->sem, 0, value) == 0);
+    return s;
+}
+
+void pa_semaphore_free(pa_semaphore *s) {
+    pa_assert(s);
+    pa_assert_se(sem_destroy(&s->sem) == 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);
+}