devsound/hwdevapi/inc/MmfHwDevice.inl
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 11 May 2010 17:37:08 +0300
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// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#ifndef __MMF_HW_DEVICE_INL__
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#define __MMF_HW_DEVICE_INL__
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#include <ecom/ecom.h>
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/**
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Create a CMMFHwDevice object from .dll.
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Will leave if dll cannot be loaded (KErrNotFound).
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@param dll Implementation .dll
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@return an instantiated CMMFHwDevice derived object from a DLL.
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*/
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// modification to pass by reference would cause a BC break
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// coverity[pass_by_value]
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inline CMMFHwDevice* CMMFHwDevice::NewL(TFileName dll)
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	{
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	RLibrary library;
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	User::LeaveIfError(library.Load(dll));
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	TLibraryFunction entry=library.Lookup(2); // 1 ponits to implementation table
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	CMMFHwDevice* mmfHwDevice = (CMMFHwDevice*)entry();
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	return mmfHwDevice;
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	}
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/**
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 *
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 * Destructor
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 *
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 */
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CMMFHwDevice::~CMMFHwDevice()
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	{
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	// Destroy any instance variables and then
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	// inform ecom that this specific
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	// instance of the interface has been destroyed.
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	REComSession::DestroyedImplementation(iDtor_ID_Key);
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	}
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/**
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 *
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 *	Create a CMMFHwDevice object with a known implementation Uid.
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 *  Will leave if it is not found (KErrNotFound).
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 *
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 *	@param aUid   -  The Uid of a plugin implementation
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 *
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 *	@return An instantiated CMMFHwDevice derived object from ECom.
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 *
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 */
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inline CMMFHwDevice* CMMFHwDevice::NewL(TUid aUid)
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	{
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	CMMFHwDevice* device = REINTERPRET_CAST(CMMFHwDevice*,
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											REComSession::CreateImplementationL(aUid, _FOFF(CMMFHwDevice,iDtor_ID_Key)));
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	return device;
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	}
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#endif