author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:41:05 +0100 | |
branch | RCL_3 |
changeset 43 | d3d7683d16f5 |
parent 42 | a828660c511c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002-2010 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: Declaration of the DataFrameMemMngr class. |
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* |
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*/ |
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|
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/* |
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* %version: 12 % |
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*/ |
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#ifndef DATAFRAMEMMNGR_H |
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#define DATAFRAMEMMNGR_H |
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#include "EthernetFrameMemMngr.h" |
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class WlanChunk; |
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/** |
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* Memory manager for protocol stack side client frame Rx memory |
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* |
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* @since S60 v3.1 |
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*/ |
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class DataFrameMemMngr : public DEthernetFrameMemMngr |
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{ |
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public: |
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/** Ctor */ |
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DataFrameMemMngr( |
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DWlanLogicalChannel& aParent, |
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WlanChunk*& aRxFrameMemoryPool, |
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TInt aTxFrameBufAllocationUnit ) : |
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DEthernetFrameMemMngr( aParent, aRxFrameMemoryPool ), |
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iFrameXferBlockProtoStack( NULL ), |
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iTxDataChunk( NULL ), |
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iTxFrameMemoryPool( NULL ), |
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iTxFrameBufAllocationUnit ( aTxFrameBufAllocationUnit ) |
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{}; |
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/** Dtor */ |
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virtual ~DataFrameMemMngr() |
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{ |
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iFrameXferBlockProtoStack = NULL; |
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iTxDataChunk = NULL; |
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iTxFrameMemoryPool = NULL; |
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}; |
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protected: |
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/** |
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* From DEthernetFrameMemMngr |
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* Opens a handle to the allocated shared memory chunk |
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* |
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* @since S60 5.0 |
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* @param aThread |
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* @param aSharedChunkInfo |
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* @param aSharedMemoryChunk The shared memory chunk |
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* @return system wide error code, KErrNone upon success |
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*/ |
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virtual TInt DoOpenHandle( |
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DThread& aThread, |
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TSharedChunkInfo& aSharedChunkInfo, |
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DChunk* aSharedMemoryChunk ); |
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/** |
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* From DEthernetFrameMemMngr |
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* Gets called when rx frame read cycle has ended. |
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* |
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* @since S60 3.1 |
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* @param aBufferStart first element of the array that holds pointers to |
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* Rx frame meta headers |
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* @param aNumOfBuffers number of meta header pointers in the array |
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* @return ETrue if a pending user mode frame read request exists |
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* and callee should complete it, |
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* EFalse otherwise |
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*/ |
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virtual TBool DoEthernetFrameRxComplete( |
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const TDataBuffer*& aBufferStart, |
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TUint32 aNumOfBuffers ); |
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/** |
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* From DEthernetFrameMemMngr |
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* Gets start address of Rx buffers (their offset addresses) |
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* that are waiting for completion to user mode |
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* |
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* @since S60 3.1 |
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* @return see above |
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*/ |
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virtual TUint32* DoGetTobeCompletedBuffersStart(); |
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/** |
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* From DEthernetFrameMemMngr |
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* Gets start address of Rx buffers (their offset addresses) |
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* that have been completed to user mode |
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* |
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* @since S60 3.1 |
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* @return see above |
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*/ |
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virtual TUint32* DoGetCompletedBuffersStart(); |
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/** |
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* From DEthernetFrameMemMngr |
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* Gets called when user mode client issues a frame receive request |
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* and Rx buffers have been completed to it. The completed Rx frame |
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* buffers are freed. |
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* |
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* @since S60 3.1 |
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*/ |
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virtual void DoFreeRxBuffers(); |
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/** |
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* From DEthernetFrameMemMngr |
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* Allocates a Tx packet from the shared memory. |
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* |
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* @param aLength Length of the requested Tx buffer in bytes |
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* @return Pointer to the meta header attached to the allocated packet, on |
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* success. |
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* NULL, in case of failure. |
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*/ |
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virtual TDataBuffer* AllocTxBuffer( TUint aLength ); |
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/** |
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* From DEthernetFrameMemMngr |
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* Deallocates a Tx packet. |
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* |
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* All Tx packets allocated with AllocTxBuffer() must be deallocated using |
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* this method. |
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* |
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* @param aPacket Meta header of the packet to the deallocated |
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virtual void FreeTxPacket( TDataBuffer*& aPacket ); |
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private: |
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/** |
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* From DEthernetFrameMemMngr |
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* Memory finalization method. |
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* |
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* @param aThread The user mode client thread |
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*/ |
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virtual void OnReleaseMemory( DThread& aThread ); |
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// Prohibit copy constructor. |
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DataFrameMemMngr( const DataFrameMemMngr& ); |
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// Prohibit assigment operator. |
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DataFrameMemMngr& operator= ( const DataFrameMemMngr& ); |
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private: // Data |
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* array of TDataBuffer offset addresses, denoting Rx buffers, |
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* which are waiting here in kernel mode to be completed |
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* to user mode, when the next frame receive request arrives |
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TUint32 iTobeCompletedBuffers[KMaxToBeCompletedRxBufs]; |
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* array of TDataBuffer offset addresses, denoting Rx buffers, that are |
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* currently under processing in user mode |
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TUint32 iCompletedBuffers[KMaxCompletedRxBufs]; |
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RFrameXferBlockProtocolStack* iFrameXferBlockProtoStack; |
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/** |
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* pointer to protocol stack side Tx area start in the kernel address |
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* space |
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*/ |
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TUint8* iTxDataChunk; |
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/** |
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* Tx frame memory pool manager |
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* Own. |
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*/ |
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WlanChunk* iTxFrameMemoryPool; |
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/** |
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* size of the Tx frame buffer allocation unit in bytes |
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*/ |
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TInt iTxFrameBufAllocationUnit; |
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}; |
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#endif // DATAFRAMEMMNGR_H |