//%2008////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation, The Open Group.
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; Symantec Corporation; The Open Group.
//
// 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
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//==============================================================================
//
//%/////////////////////////////////////////////////////////////////////////////
#ifndef _CMPIMsgHandleManager_H_
#define _CMPIMsgHandleManager_H_

#include <Pegasus/Common/Config.h>
#include <Pegasus/Common/ReadWriteSem.h>
#include <Pegasus/Common/MessageLoader.h>
#include <Pegasus/Common/ArrayInternal.h>
#include <Pegasus/Provider/CMPI/cmpidt.h>
#include <Pegasus/ProviderManager2/CMPI/Linkage.h>

PEGASUS_NAMESPACE_BEGIN

//
// This class is used to store and retrieve unique message file handles
// and map them to a pointer to MessageLoaderParms.
//
// To use this class first obtain the singleton instance using the
// getCMPIMsgHandleManager method.
//
// Note: The handle manager does not own the memory that is associated to
//       the handle through the pointer. It is the callers responsibility
//       to allocate and release the data behind the pointers.
//
class CMPIMsgHandleManager
{

public:

    ~CMPIMsgHandleManager();

    //
    // Retrieves the singleton instance of the handle manager.
    //
    static CMPIMsgHandleManager* getCMPIMsgHandleManager(void);

    //
    // Obtains a new unique handle and associates it with the given
    // data pointer.
    //
    CMPIMsgFileHandle getNewHandle(MessageLoaderParms* data);

    //
    // Returns the data pointer associated to handle.
    // Throws IndexOutOfBoundsException for unused or invalid handles.
    //
    MessageLoaderParms* getDataForHandle(CMPIMsgFileHandle handle);

    //
    // Releases the given handle, marking it as unused.
    // Throws IndexOutOfBoundsException for unused or invalid handles.
    // Note: This method does not release any storage. It is the callers
    //       responsibility to release the memory behind the data pointer
    //       returned by this method.
    //
    MessageLoaderParms* releaseHandle(CMPIMsgFileHandle handle);

private:

    CMPIMsgHandleManager();

    static CMPIMsgHandleManager* _handleManagerInstance;

    // auto-initialisation due to being on the stack
    Array<MessageLoaderParms*> handleTable;

    // Semaphore to protect the handle array from concurrent updates and
    // to serialize the creation of the singleton instance
    static ReadWriteSem _rwsemHandleTable;

};

PEGASUS_NAMESPACE_END

#endif