From: Rémi Denis-Courmont <rdenis@simphalempin.com>
Date: Sat, 5 Jul 2008 11:07:45 +0000 (+0300)
Subject: barrier(): issues a full memory barrier
X-Git-Tag: 0.9.0-test2~266
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=06e3b333dcadd50c4e335337ac852918331499ca;p=vlc

barrier(): issues a full memory barrier
---

diff --git a/include/vlc_threads.h b/include/vlc_threads.h
index 89e8ccc488..5779ee8758 100644
--- a/include/vlc_threads.h
+++ b/include/vlc_threads.h
@@ -559,6 +559,22 @@ static inline int vlc_spin_init (vlc_spinlock_t *spin)
 # define vlc_spin_destroy vlc_mutex_destroy
 #endif
 
+/**
+ * Issues a full memory barrier.
+ */
+static inline void barrier (void)
+{
+#if defined (__GNUC__) /* FIXME: || defined (ICC_whatever) */
+    __sync_synchronize ();
+#elif defined (LIBVLC_USE_PTHREAD)
+    static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+    pthread_mutex_lock (&lock);
+    pthread_mutex_unlock (&lock);
+#else
+# error barrier not implemented!
+#endif
+}
+
 /*****************************************************************************
  * vlc_thread_create: create a thread
  *****************************************************************************/