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+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2003-2005 The ScummVM project
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#ifndef COMMON_MUTEX_H
+#define COMMON_MUTEX_H
+
+#include "common/scummsys.h"
+
+namespace Common {
+
+/**
+ * An pseudo-opaque mutex type. See OSystem::createMutex etc. for more details.
+ */
+typedef struct Mutex *MutexRef;
+
+
+/**
+ * Auxillary class to (un)lock a mutex on the stack.
+ */
+class StackLock {
+	MutexRef _mutex;
+	const char *_mutexName;
+
+	void lock();
+	void unlock();
+public:
+	StackLock(MutexRef mutex, const char *mutexName = NULL);
+	~StackLock();
+};
+
+
+} // End of namespace Common
+
+#endif