author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:28:57 +0100 | |
branch | RCL_3 |
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parent 63 | d189ee25cf9d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 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: Support for executing asynchronously certain plugin |
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* operations. |
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*/ |
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#ifndef __BASEPLUGINDELAYEDOPS_H__ |
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#define __BASEPLUGINDELAYEDOPS_H__ |
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#include <e32base.h> |
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#include "cfsmailcommon.h" |
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#include "baseplugin.h" |
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#include "debuglogmacros.h" |
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class CBasePlugin; |
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class CDelayedOp; |
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/** |
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* The interface to the delayed operations manager implementation. Plugins |
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* must talk to the manager only through this interface. |
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*/ |
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class MDelayedOpsManager |
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{ |
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public: |
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/** |
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* |
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*/ |
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virtual ~MDelayedOpsManager() {}; |
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/** |
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* @param aOp ownership is transferred |
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*/ |
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virtual void EnqueueOpL( CDelayedOp* aOp ) = 0; |
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/** |
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* @param aOp the caller must delete the operation |
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*/ |
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virtual void DequeueOp( const CDelayedOp& aOp ) = 0; |
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/** |
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* API for future extensions. |
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*/ |
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virtual TInt Extension1( |
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TUint aExtensionId, TAny*& a0, TAny* a1 ) = 0; |
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}; |
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/** |
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* The base class for the delayed operations. All of the delayed operations must |
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* derive from it. |
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*/ |
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class CDelayedOp : public CActive |
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{ |
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public: |
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IMPORT_C virtual ~CDelayedOp(); |
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IMPORT_C void SetContext( |
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CBasePlugin& aPlugin, |
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MDelayedOpsManager& aManager ); |
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IMPORT_C void StartOp(); |
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/** |
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* Derived classes must implement their asynchronous processing in this |
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* method. The GetPlugin method can only be used from within this method. |
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* Returns boolean: ETrue if op is yielding and needs to be called again, or EFalse if op is done. |
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*/ |
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virtual TBool ExecuteOpL() = 0; |
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protected: |
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IMPORT_C CDelayedOp(); |
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/** |
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* Returns the plugin instance associated with this operation. Available |
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* only from within the ExecuteOpL method. |
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*/ |
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IMPORT_C CBasePlugin& GetPlugin(); |
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private: |
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IMPORT_C virtual void RunL(); |
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IMPORT_C virtual void DoCancel(); |
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private: |
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MDelayedOpsManager* iManager; //not owned |
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CBasePlugin* iPlugin; //not owned |
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__LOG_DECLARATION |
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}; |
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#endif // __BASEPLUGINDELAYEDOPS_H__ |