author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 16:17:46 +0300 | |
branch | RCL_3 |
changeset 93 | 79859ed3eea9 |
parent 91 | 30342f40acbf |
child 94 | 919f36ff910f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006 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 the License "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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*/ |
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#ifndef __ALLOCATOR_H__ |
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#define __ALLOCATOR_H__ |
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// INCLUDES |
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#include <e32base.h> |
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#include <e32std.h> |
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#include "MemoryManager.h" |
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// CONSTANTS |
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// MACROS |
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// DATA TYPES |
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// FORWARD DECLARATIONS |
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class CStopScheduler; |
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struct TFreeMem |
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{ |
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TUint iPool; |
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TUint iHeap; |
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TUint iHal; |
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}; |
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// CLASS DECLARATION |
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/** |
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* |
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* @lib memman.lib |
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* @since 3.1 |
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*/ |
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class CMemoryPool |
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{ |
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public: |
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virtual ~CMemoryPool(); |
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/** |
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* create the allocator |
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* @since 3.1 |
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* @param aSize bytes of memory to be allocated |
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* @return pointer to the allocated memory |
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*/ |
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virtual TBool Create(); |
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/** |
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* allocate a memory buffer |
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* @since 3.1 |
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* @param aSize bytes of memory to be allocated |
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* @return pointer to the allocated memory |
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*/ |
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virtual TAny* Allocate( TUint aSize ) = 0; |
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/** |
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* realloc a memory buffer |
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* @since 3.1 |
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* @param aSize bytes of memory to be allocated |
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* @return pointer to the allocated memory |
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*/ |
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virtual TAny* ReAllocate( TAny* aPtr, TUint aSize ) = 0; |
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/** |
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* free the memory |
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* @since 3.1 |
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* @param aPtr pointer to the memory to be freed |
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* @param |
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* @return |
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*/ |
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virtual void Free( TAny* aPtr ) = 0; |
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/** |
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* get the size of a memory buffer |
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* @since 3.1 |
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* @param aPtr pointer to the memory buffer |
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* @param |
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* @return size of memory buffer |
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*/ |
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virtual TUint MemorySize( TAny* aPtr ) = 0; |
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/** |
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* set the size of rescue buffer |
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* @since 3.1 |
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* @param aPtr pointer to the memory buffer |
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* @param |
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* @return size of memory buffer |
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*/ |
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virtual void SetRescueBufferSize( TInt aSize ) = 0; |
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/** |
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* register a memory collector, memory manager doesn't own this collector |
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* @since 3.1 |
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* @param aCollector the collector to be registered |
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* @param |
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* @return |
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*/ |
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void AddCollector( MMemoryCollector* aCollector ); |
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/** |
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* unregister a memory collector |
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* @since 3.1 |
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* @param aCollector the collector to be unregistered |
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* @param |
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* @return |
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*/ |
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void RemoveCollector( MMemoryCollector* aCollector ); |
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/** |
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* collect free memory from memory collectors |
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* @since 3.1 |
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* @param |
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* @return |
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*/ |
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void CollectMemory(TUint aSize=-1); |
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/** |
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* restore the states of memory collectors |
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* @since 3.1 |
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* @param |
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* @return |
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*/ |
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void RestoreCollectors( TOOMPriority aPriority ); |
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/** |
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* register a stopper, memory manager doesn't own this stopper. |
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* @since 3.1 |
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* @param aStopper the stopper to be registered |
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* @param |
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* @return |
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*/ |
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void AddStopper( MOOMStopper* aStopper ); |
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/** |
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* unregister a stopper |
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* @since 3.1 |
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* @param aStopper the stopper to be unregistered |
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* @param |
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* @return |
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*/ |
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void RemoveStopper( MOOMStopper* aStopper ); |
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/** |
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* toggle the stopping status of memory manager |
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* @since 3.1 |
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* @param aStopping |
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* @param |
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* @return |
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*/ |
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void SetStopping( TBool aStopping ); |
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/** |
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* get the array of stoppers, used by stopscheduler |
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* @since 3.1 |
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* @param |
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* @param |
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* @return an array of stoppers |
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*/ |
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RPointerArray<MOOMStopper>& Stoppers() { return iStoppers; } |
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/** |
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* set the OOM notifier, memory manager doesn't own this notifier |
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* @since 3.1 |
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* @param aNotifier the notifier |
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* @param |
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* @return |
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*/ |
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void SetNotifier( MOOMNotifier* aNotifier ); |
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|
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/** |
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* check if the memory manager is able to reserve enough memory for the coming operation. |
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* @since 3.1 |
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* @param aTotalSize total amount of memory |
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* @param aMaxBufSizse the biggest contiguous memory buffer |
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* @param aChecker the name of operation |
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* @return result of prechecking, ETrue = successful |
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*/ |
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virtual TBool PreCheck( TUint aTotalSize, TUint aMaxBufSize, const TDesC8& aChecker ) = 0; |
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|
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/** |
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* An additional check after an operation is completed. |
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* @since 3.1 |
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* @param |
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* @param |
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* @return the status of memory during this operation. |
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*/ |
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virtual TUint PostCheck() = 0; |
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|
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/** |
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* Trigger an OOM event, this function is only for debugging purpose |
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* @since 3.1 |
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* @param aType defines where memory allocation fails |
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* @param |
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* @return |
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*/ |
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void TriggerOOM( TOOMType aType ); |
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/** |
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* get status of memory manager |
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* @since 3.1 |
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* @param |
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* @param |
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* @return the status |
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*/ |
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TUint Status() { return iMemStatus; } |
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/** |
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* |
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* @since 3.1 |
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* @param |
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* @return |
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*/ |
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void SetStatus( TOOMCheckResult aStatus ); |
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/** |
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* |
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* @since 3.1 |
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* @param |
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* @return |
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*/ |
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TAny* AllocFromPool( TUint sz ); |
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/** |
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* |
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* @since 3.1 |
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* @param |
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* @return |
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*/ |
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TUint DebugOOM() { return iOOMType; } |
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/** |
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* |
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* @since 3.1 |
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* @param |
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* @return |
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*/ |
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virtual TUint FreeMemory( TFreeMem& aFree ) = 0; |
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virtual void RestoreRescueBuffer() = 0; |
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protected: |
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CMemoryPool() : iNotifier( 0 ) {} |
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/** |
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* utility function, notify the user and stop ongoing operations |
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* @since 3.1 |
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* @return |
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*/ |
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void NotifyAndStop(); |
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/** |
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* allocate a buffer |
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* @since 3.1 |
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* @param aPtr the buffer to be allocated |
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* @param |
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* @return ETrue successfully freed |
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*/ |
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virtual TAny* DoAlloc( TUint aSize ) = 0; |
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MOOMNotifier* iNotifier; |
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TInt iNestedChecks; |
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TBool iIsStopping; |
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RPointerArray<MOOMStopper> iStoppers; |
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CStopScheduler* iStopScheduler; |
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TBool iIsCollecting; |
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RPointerArray<MMemoryCollector> iCollectors; |
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TUint iMemStatus; |
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// for debugging |
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TUint iOOMType; |
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}; |
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/** |
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* The memory pool using dlmalloc for fast allocation |
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* @lib memman.lib |
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* @since 3.1 |
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*/ |
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class CFastMemoryPool : public CMemoryPool |
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{ |
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public: |
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TAny* Allocate( TUint aSize ) { return AllocFromPool( aSize ); } |
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TAny* ReAllocate( TAny* aPtr, TUint aSize ); |
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void Free( TAny* aPtr ); |
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TUint MemorySize( TAny* aPtr ); |
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void SetRescueBufferSize( TInt aSize ); |
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TAny* DoAlloc( TUint aSize ); |
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TBool PreCheck( TUint aTotalSize, TUint aMaxBufSize, const TDesC8& aChecker ); |
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TUint PostCheck(); |
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TUint FreeMemory( TFreeMem& aFree ); |
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void RestoreRescueBuffer(); |
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}; |
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/** |
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* The default memory pool only using User static allocating functions |
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* @lib memman.lib |
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* @since 3.1 |
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*/ |
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class CDefaultMemoryPool : public CMemoryPool |
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{ |
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public: |
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CDefaultMemoryPool() : iRescueBufferSize( 0 ) {} |
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~CDefaultMemoryPool(); |
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TAny* Allocate( TUint aSize ) { return AllocFromPool( aSize ); } |
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TAny* ReAllocate( TAny* aPtr, TUint aSize ); |
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void Free( TAny* aPtr ); |
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TUint MemorySize( TAny* aPtr ); |
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void SetRescueBufferSize( TInt aSize ); |
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TAny* DoAlloc( TUint aSize ); |
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TBool PreCheck( TUint aTotalSize, TUint aMaxBufSize, const TDesC8& aChecker ); |
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TUint PostCheck(); |
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TUint FreeMemory( TFreeMem& aFree ); |
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void RestoreRescueBuffer(); |
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private: |
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TUint iRescueBufferSize; |
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}; |
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|
8
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class RSymbianDLHeap; |
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/** |
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* The memory pool using new symbian DLMalloc/Slab hybrid allocator for fast allocation |
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* @lib memman.lib |
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* @since 3.1 |
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*/ |
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NONSHARABLE_CLASS(CNewSymbianHeapPool) : public CMemoryPool |
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{ |
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public: |
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CNewSymbianHeapPool(); |
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~CNewSymbianHeapPool(); |
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TBool Create(); |
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TAny* Allocate( TUint aSize ) { return AllocFromPool( aSize ); } |
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TAny* ReAllocate( TAny* aPtr, TUint aSize ); |
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void Free( TAny* aPtr ); |
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TUint MemorySize( TAny* aPtr ); |
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void SetRescueBufferSize( TInt aSize ); |
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TAny* DoAlloc( TUint aSize ); |
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TBool PreCheck( TUint aTotalSize, TUint aMaxBufSize, const TDesC8& aChecker ); |
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TUint PostCheck(); |
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TUint FreeMemory( TFreeMem& aFree ); |
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void RestoreRescueBuffer(); |
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#ifdef OOM_LOGGING |
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void DumpHeapLogs(); |
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#endif |
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private: |
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void InitLocal(); |
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RSymbianDLHeap *iAlloc; |
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}; |
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#endif |