A templatized adaptation of BAutolock. Any class which supplies the

necessary functions can be managed with BObjectLocker:
	bool Lock()		--	returns whether lock succeeded
	void Unlock()	--	unlocks the client instance


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@245 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/shared/ObjectLocker.h

@@ -0,0 +1,100 @@
+//------------------------------------------------------------------------------
+//	Copyright (c) 2001-2002, OpenBeOS
+//
+//	Permission is hereby granted, free of charge, to any person obtaining a
+//	copy of this software and associated documentation files (the "Software"),
+//	to deal in the Software without restriction, including without limitation
+//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+//	and/or sell copies of the Software, and to permit persons to whom the
+//	Software is furnished to do so, subject to the following conditions:
+//
+//	The above copyright notice and this permission notice shall be included in
+//	all copies or substantial portions of the Software.
+//
+//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+//	DEALINGS IN THE SOFTWARE.
+//
+//	File Name:		ObjectLocker.h
+//	Author(s):		Erik Jaesler ([email protected])
+//	Description:	A templatized version of BAutolock.  Client class needs to
+//					supply:
+//						bool Lock()		--	returns whether lock succeeded
+//						void Unlock()	--	unlocks the class
+//------------------------------------------------------------------------------
+
+#ifndef OBJECTLOCKER_H
+#define OBJECTLOCKER_H
+
+// Standard Includes -----------------------------------------------------------
+
+// System Includes -------------------------------------------------------------
+
+// Project Includes ------------------------------------------------------------
+
+// Local Includes --------------------------------------------------------------
+
+// Local Defines ---------------------------------------------------------------
+
+// Globals ---------------------------------------------------------------------
+
+namespace BPrivate {
+
+template<class T>
+class BObjectLocker
+{
+	public:
+		inline BObjectLocker(T* looper);
+		inline BObjectLocker(T& locker);
+		
+		inline ~BObjectLocker();
+		
+		inline bool IsLocked(void);
+	
+	private:
+		T*		fLockClient;
+		bool	fIsLocked;
+};
+
+template<class T>
+BObjectLocker<T>::BObjectLocker(T* client)
+	:	fLockClient(client), fIsLocked(client->Lock())
+{
+}
+
+template<class T>
+BObjectLocker<T>::BObjectLocker(T& client)
+	:	fLockClient(&client), fIsLocked(client.Lock())
+{
+}
+
+template<class T>
+BObjectLocker<T>::~BObjectLocker()
+{
+	if (fIsLocked)
+	{
+		fLockClient->Unlock();
+	}
+}
+
+template<class T>
+bool BObjectLocker<T>::IsLocked(void)
+{
+	return fIsLocked;
+}
+
+}	// namespace BPrivate
+
+#endif	//OBJECTLOCKER_H
+
+/*
+ * $Log $
+ *
+ * $Id  $
+ *
+ */
+