Added an abstract version of MutexManager. Deleted DefaultMutexManager, now it's NullMutexManager.

svn-id: r49556

1 files changed, 39 insertions, 0 deletions

diff --git a/backends/mutex/null/null-mutex.h b/backends/mutex/null/null-mutex.h
new file mode 100644
index 0000000000..76bb595631
--- /dev/null
+++ b/backends/mutex/null/null-mutex.h
@@ -0,0 +1,39 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef BACKENDS_MUTEX_NULL_H
+#define BACKENDS_MUTEX_NULL_H
+
+#include "backends/mutex/abstract-mutex.h"
+
+class NullMutexManager : MutexManager {
+public:
+	OSystem::MutexRef createMutex() { return OSystem::MutexRef(); }
+	void lockMutex(OSystem::MutexRef mutex) {}
+	void unlockMutex(OSystem::MutexRef mutex) {}
+	void deleteMutex(OSystem::MutexRef mutex) {}
+};
+
+#endif