camerauis/cameraapp/generic/inc/cameracontroller/cambuffershare.h
changeset 0 1ddebce53859
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/camerauis/cameraapp/generic/inc/cameracontroller/cambuffershare.h	Thu Jan 07 16:18:56 2010 +0200
@@ -0,0 +1,93 @@
+/*
+* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Reference counting wrapper for MCameraBuffer.
+*
+*/
+
+
+#ifndef CAM_BUFFERSHARE_H
+#define CAM_BUFFERSHARE_H
+
+#include <e32base.h>
+
+
+class MCameraBuffer;
+
+class CCamBufferShare : public CBase
+  {
+  // =======================================================
+  // Methods
+
+  // -------------------------------------------------------
+  // Constructor and destructor
+  public:
+
+    /**
+    * This is just a wrapper class => c++ constructor
+    */
+    CCamBufferShare( MCameraBuffer* aSharedBuffer );
+
+  private:    
+
+    /**
+    * Reference counting used, so destructor is private.
+    */
+    ~CCamBufferShare();
+    
+  // -------------------------------------------------------
+  // Other methods
+  public:
+
+    /**
+    * Get the shared buffer. Ownership not given to caller.
+    */
+    MCameraBuffer* SharedBuffer();
+
+    /**
+    * Reserve a reference to this share.
+    */  
+    void Reserve();
+
+    /**
+    * Release a reference to this share.
+    */
+    void Release();
+
+#ifdef _DEBUG
+    /**
+    * Get the amount of used buffers in total.
+    */
+    static TInt TotalBufferShareCount();
+#endif
+ 
+  // =======================================================
+  // Data 
+  protected:
+
+#ifdef _DEBUG
+    static TInt    isTotalBufferCount;
+#endif
+
+  private:
+
+    MCameraBuffer* iSharedBuffer;
+    TInt           iReferenceCount;
+    
+  // =======================================================
+  };
+
+#endif
+
+// end of file
+