--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/common/inc/glxsingletonstore.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,106 @@
+/*
+* Copyright (c) 2008-2009 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:    TLS store for singleton objects
+*
+*/
+
+
+
+
+#ifndef __C_GLXSINGLETONSTORE_H__
+#define __C_GLXSINGLETONSTORE_H__
+
+#include <e32base.h>
+
+/**
+ *  CGlxSingletonStore
+ *
+ *  Store for singleton objects
+ * 
+ *  Usage:
+ *
+ *  Singleton class must be derived from CBase (either
+ *  directly or via base class). Otherwise, singleton's destructor
+ *  is not called correctly.
+ *
+ *  class CMyClass : public CBase ...
+ *      {
+ *  public:
+ *      static CMyClass* InstanceL() 
+ *          {
+ *          // Pass in the factory function
+ *          return CGlxSingletonStore::InstanceL(&NewL);
+ *          }
+ *
+ *      void Close() 
+ *          {
+ *          CGlxSingletonStore::Close(this);
+ *          }
+ *
+ *  private:
+ *      static CMyClass* NewL() 
+ *          {
+ *          ...
+ *          }
+ *      };
+ *
+ */
+NONSHARABLE_CLASS(CGlxSingletonStore) : public CBase
+    {
+public:
+    /** 
+     * Return a singleton instance and add to reference count
+     */ 
+    template <class T>
+    static T* InstanceL(T* (*aFactoryFuncL)());
+
+    /** 
+     * Decrement reference count of singleton instance 
+     * and delete if last reference removed
+     */ 
+    IMPORT_C static void Close(CBase* aInstance);
+    
+    /** Destructor */ 
+    IMPORT_C ~CGlxSingletonStore();
+
+private:
+    /** Constructor */ 
+    CGlxSingletonStore();
+    
+    /** 
+     * Two-phase constructor
+     * Creates an instance if one does not already exist
+     * Exported for accessing from inline function
+     */
+    IMPORT_C static CGlxSingletonStore* InstanceLC();
+
+    /** Cleanup function for Cleanup Stack */
+    static void Cleanup(TAny* aSingletonStore);        
+    
+private:
+    /** Struct to store a singleton an its ref count */
+	class TSingleton
+	    {
+	public:
+	    CBase* iObject;
+	    TInt iReferenceCount;	    
+	    };
+	
+	/** Array of singletons */
+	RArray<TSingleton> iSingletons;
+    };
+    
+#include "glxsingletonstore.inl"
+
+#endif // __C_GLXSINGLETONSTORE_H__