Moved mutex stuff into a seperate header

svn-id: r16526

common/mutex.h

@@ -0,0 +1,52 @@
+/* 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

common/system.h

@@ -25,6 +25,7 @@
 
 #include "common/scummsys.h"
 #include "common/util.h"
+#include "common/mutex.h"
 #include "common/rect.h"
 #include "common/savefile.h"
 #include "common/singleton.h"
@@ -541,8 +542,8 @@ public:
 	 * can use dummy implementations for these methods.
 	 */
 	//@{
-
+	
-	typedef struct Mutex *MutexRef;
+	typedef Common::MutexRef	MutexRef;
 
 	/**
 	 * Create a new mutex.
@@ -679,27 +680,8 @@ public:
 };
 
 
-
 /** The global OSystem instance. Inited in main(). */
 #define g_system	(&OSystem::instance())
 
-namespace Common {
-
-/**
- * Auxillary class to (un)lock a mutex on the stack.
- */
-class StackLock {
-	OSystem::MutexRef _mutex;
-	const char *_mutexName;
-
-	void lock();
-	void unlock();
-public:
-	StackLock(OSystem::MutexRef mutex, const char *mutexName = NULL);
-	~StackLock();
-};
-
-}	// End of namespace Common
-
 
 #endif