/*

* Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Main classes for Out of Memory Monitor.

*

*/

#include "oommonitorclientserver.h"

#include "oommemorymonitorsession.h"

#include "oommemorymonitor.h"

#include "oommemorymonitorserver.h"

#include "OomTraces.h"

#include "oomclientrequestqueue.h"

CMemoryMonitorSession::CMemoryMonitorSession()

    {

    FUNC_LOG;

    }

CMemoryMonitorSession::~CMemoryMonitorSession()

    {

    FUNC_LOG;

    }

CMemoryMonitorServer& CMemoryMonitorSession::Server()

    {

    FUNC_LOG;

    return *static_cast<CMemoryMonitorServer*>(const_cast<CServer2*>(CSession2::Server()));

    }

#ifdef CLIENT_REQUEST_QUEUE

COomClientRequestQueue& CMemoryMonitorSession::ClientRequestQueue()

    {

    FUNC_LOG;

    return Server().ClientRequestQueue();

    }

#endif

CMemoryMonitor& CMemoryMonitorSession::Monitor()

    {

    FUNC_LOG;

#ifdef CLIENT_REQUEST_QUEUE

    return ClientRequestQueue().Monitor();

#else

    return Server().Monitor();    

#endif

    }

TBool CMemoryMonitorSession::IsDataPaged(const RMessage2& aMessage)

    {

    RThread clientThread;

    TInt err = aMessage.Client(clientThread);

    TBool dataPaged = EFalse;

    if(err == KErrNone)

        {

        RProcess processName;

        err = clientThread.Process(processName);

        if(err == KErrNone)

            {

            dataPaged = processName.DefaultDataPaged();

            }

        else

            {

            PanicClient(aMessage, EPanicIllegalFunction);

            }

        }

    else

        {

        PanicClient(aMessage, EPanicIllegalFunction);

        }

    return dataPaged;            

    }

void CMemoryMonitorSession::ServiceL(const RMessage2& aMessage)

    {

    FUNC_LOG;

#ifndef CLIENT_REQUEST_QUEUE

    iFunction = aMessage.Function();

#endif 

    switch (aMessage.Function())

        {

        case EOomMonitorRequestFreeMemory:

            if (!iRequestFreeRam.IsNull())

                PanicClient(aMessage, EPanicRequestActive);

            // message will be completed when CloseAppsFinished() is called.  

#ifdef CLIENT_REQUEST_QUEUE

            ClientRequestQueue().RequestFreeMemoryL(aMessage);

#else

            iRequestFreeRam = aMessage;

            Monitor().RequestFreeMemoryL(aMessage.Int0(), IsDataPaged(aMessage));

#endif

            break;

        case EOomMonitorCancelRequestFreeMemory:

            if (!iRequestFreeRam.IsNull())

                iRequestFreeRam.Complete(KErrCancel);

            aMessage.Complete(KErrNone);

            break;

        case EOomMonitorThisAppIsNotExiting:

            Monitor().AppNotExiting(aMessage.Int0());

            aMessage.Complete(KErrNone);

            break;

        case EOomMonitorRequestOptionalRam:

            if (!iRequestFreeRam.IsNull())

                PanicClient(aMessage, EPanicRequestActive);

            // message will be completed when CloseAppsFinished() is called.

#ifdef CLIENT_REQUEST_QUEUE

            ClientRequestQueue().RequestOptionalRamL(aMessage);

#else

            iRequestFreeRam = aMessage;

            iMinimumMemoryRequested = aMessage.Int1();

            Monitor().FreeOptionalRamL(aMessage.Int0(), aMessage.Int2(), IsDataPaged(aMessage));

#endif            

            break;

        case EOomMonitorSetPriorityBusy:

            Monitor().SetPriorityBusy(aMessage.Int0());

            aMessage.Complete(KErrNone);

            break;

        case EOomMonitorSetPriorityNormal:

               Monitor().SetPriorityNormal(aMessage.Int0());

            aMessage.Complete(KErrNone);

            break;

        case EOomMonitorSetPriorityHigh:

               Monitor().SetPriorityHigh(aMessage.Int0());

            aMessage.Complete(KErrNone);

            break;

        default:

            PanicClient(aMessage, EPanicIllegalFunction);

            break;

        }

    }

#ifndef CLIENT_REQUEST_QUEUE

void CMemoryMonitorSession::CloseAppsFinished(TInt aBytesFree, TBool aMemoryGood)

    {

    FUNC_LOG;

    if (!iRequestFreeRam.IsNull())

        {

        if (iFunction == EOomMonitorRequestOptionalRam)

            {

            TInt memoryAvailable = aBytesFree - CMemoryMonitor::GlobalConfig().iGoodRamThreshold;

            // If memory available is greater than the requested RAM then complete with the amount of free memory, otherwise complete with KErrNoMemory

            if (memoryAvailable >= iMinimumMemoryRequested)

                {

                iRequestFreeRam.Complete(memoryAvailable);

                }

            else

                {

                iRequestFreeRam.Complete(KErrNoMemory);

                }

               }

        else 

            iRequestFreeRam.Complete(aMemoryGood ? KErrNone : KErrNoMemory);

        }

    }

#endif