commsfwutils/commsbufs/src/commsbufasyncreqinternal.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 21 Jun 2010 17:02:22 +0300
branchRCL_3
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Revision: 201025 Kit: 2010125
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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:
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//
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#include "es_commsbuf_internal.h"
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#include <comms-infras/commsbufpondop.h>
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#include "commsbufasyncreqinternal.h"
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#include "commsbufpondintf.h"
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EXPORT_C CCommsBufAsyncRequest::CCommsBufAsyncRequest(TCommsBufAllocator& aAllocator)
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:iAllocator(aAllocator)
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    {
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    iLink.iPrev = &iLink;
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    iLink.iNext = &iLink;    
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    }
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EXPORT_C CCommsBufAsyncRequest::~CCommsBufAsyncRequest()
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    {
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    }
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void CCommsBufAsyncRequest::Alloc(RCommsBufChain& aChain, TInt aSize, TInt aMinSize, TInt aMaxSize, TRequestStatus& aStatus)
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    {
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    iSize = aSize;
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    iMinSize = aMinSize;
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    iMaxSize = aMaxSize;
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    iChain = &aChain;
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    iStatusPtr = &aStatus;
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    *iStatusPtr = KRequestPending;
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    // Try to satify the request syncronously
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    TInt err = aChain.Alloc(iSize, iAllocator);
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    if (err==KErrNone)
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        {
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#ifdef __CFLOG_ACTIVE
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        __CFLOG_2(KSubsysMBufMgr, KSubsysMBufMgrAsyncAlloc, _L8("RMBufAsyncRequest %x:\tAlloc(aLength %d) request satisfied immediately"), this, aLength);
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#endif
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        User::RequestComplete(iStatusPtr, KErrNone);
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        return;
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        }
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    // Sync alloc failed, so setup the async alloc request
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    TThreadId id = RThread().Id();
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    TInt ret = iThread.Open(id);
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    if(ret == KErrNone)
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        {
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#ifdef __CFLOG_ACTIVE
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        __CFLOG_2(KSubsysMBufMgr, KSubsysMBufMgrAsyncAlloc, _L8("RCommsBufAsyncRequest %x:\tAlloc(aLength %d) starting request"), this, aSize);
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#endif
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        iAllocator.iPond.StartRequest(*this);
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        }
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    else
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        {
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#ifdef __CFLOG_ACTIVE
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        __CFLOG_3(KSubsysMBufMgr, KSubsysMBufMgrAsyncAlloc, _L8("RCommsBufAsyncRequest %x:\tAlloc(aLength %d) failed with %d"), this, aSize, ret);
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#endif
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        }    
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    }
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void CCommsBufAsyncRequest::Cancel()
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    {
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    iAllocator.iPond.CancelRequest(*this);
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    }
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EXPORT_C void CCommsBufAsyncRequest::Complete(TInt aCode)
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    {
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#ifdef __CFLOG_ACTIVE
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    __CFLOG_2(KSubsysMBufMgr, KSubsysMBufMgrAsyncAlloc, _L8("RCommsBufAsyncRequest %x:\tComplete(aCode %d)"), this, aCode);
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#endif
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    iLink.Deque();
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    if (aCode==KErrNone)
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        {
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        // In future we may have another smarter way of doing this.
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        // Currently RCommsBufQ is internal
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        RCommsBufChain chain(iBufQ.First());       
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        iChain->Assign(chain);
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        iBufQ.Init();
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        }
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    else
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        {
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        iBufQ.Free();  
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        }
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    iThread.RequestComplete(iStatusPtr, aCode);
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    iThread.Close();  
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    }
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