From 4944976e40254bb57337e3544dc067133f140637 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Mon, 13 Aug 2012 00:40:00 +0000
Subject: Add Raul::barrier() and remove glib dependency from RingBuffer.
 Improve RingBuffer performance.

git-svn-id: http://svn.drobilla.net/lad/trunk/raul@4674 a436a847-0d15-0410-975c-d299462d15a1
---
 raul/barrier.hpp | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 raul/barrier.hpp

(limited to 'raul/barrier.hpp')

diff --git a/raul/barrier.hpp b/raul/barrier.hpp
new file mode 100644
index 0000000..952278e
--- /dev/null
+++ b/raul/barrier.hpp
@@ -0,0 +1,56 @@
+/*
+  This file is part of Raul.
+  Copyright 2012 David Robillard <http://drobilla.net>
+
+  Raul is free software: you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation, either version 3 of the License, or any later version.
+
+  Raul 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 General Public License
+  along with Raul.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RAUL_BARRIER_HPP
+#define RAUL_BARRIER_HPP
+
+#if defined(__APPLE__)
+#include <libkern/OSAtomic.h>
+
+namespace Raul {
+static inline void barrier() {
+	OSMemoryBarrier();
+}
+}
+
+#elif defined(_WIN32)
+#include <windows.h>
+
+namespace Raul {
+static inline void barrier() {
+	MemoryBarrier();
+}
+}
+
+#elif (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
+
+namespace Raul {
+static inline void barrier() {
+	__sync_synchronize();
+}
+}
+
+#else
+#pragma message("warning: No memory barriers, possible SMP bugs")
+
+namespace Raul {
+static inline void barrier() {
+}
+}
+
+#endif
+
+#endif // RAUL_BARRIER_HPP
-- 
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