/*

* Copyright (c) 2008 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 Graphics Out of Memory Monitor

*

*/

#include "goommonitorclientserver.h"

#include "goommemorymonitorsession.h"

#include "goommemorymonitor.h"

#include "goommemorymonitorserver.h"

#include "goomtraces.h"

CMemoryMonitorSession::CMemoryMonitorSession()

    {

    FUNC_LOG;

    }

void CMemoryMonitorSession::CreateL()

    {

    FUNC_LOG;

    }

CMemoryMonitorSession::~CMemoryMonitorSession()

    {

    FUNC_LOG;

    if (iUseAbsoluteTargets)

        { // se3ssion terminated while on critical allocation, release lock

        Server().Monitor().SessionInCriticalAllocation(0);

        }

    CloseAppsFinished(0, EFalse);

    }

CMemoryMonitorServer& CMemoryMonitorSession::Server()

    {

    FUNC_LOG;

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

    }

CMemoryMonitor& CMemoryMonitorSession::Monitor()

    {

    FUNC_LOG;

    return Server().Monitor();

    }

void CMemoryMonitorSession::ServiceL(const RMessage2& aMessage)

    {

    FUNC_LOG;

    iFunction = aMessage.Function();

    RThread t;

    aMessage.Client(t);

    t.Close();

    switch (aMessage.Function())

        {

        case EGOomMonitorRequestFreeMemory:

                {

                aMessage.Complete(KErrInUse);

                return;

                }

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

            if (aMessage.Int1() == 0)

                {

                iRequestFreeRam = aMessage;

                TRAPD(err, Monitor().RequestFreeMemoryL(aMessage.Int0(), iUseAbsoluteTargets));

                if (err)

                    {

                    // completes the message if that was left to pending

                    CloseAppsFinished(0, EFalse);

                    }

                }

            else

                {

                TInt appUid = aMessage.Int1();

                // if no new memory was needed, the message is completed synchronously

                iRequestFreeRam = aMessage;

                TRAP_IGNORE(Monitor().HandleFocusedWgChangeL(appUid));

                }

            break;

        case EGOomMonitorCancelRequestFreeMemory:

            if (!iRequestFreeRam.IsNull())

                {

                iRequestFreeRam.Complete(KErrCancel);

                }

            aMessage.Complete(KErrNone);

            break;

        case EGOomMonitorThisAppIsNotExiting:

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

            aMessage.Complete(KErrNone);

            break;

        case EGOomMonitorRequestOptionalRam:

                {

                aMessage.Complete(KErrInUse);

                }

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

            iRequestFreeRam = aMessage;

            iMinimumMemoryRequested = aMessage.Int1();

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

            break;

        case EGOomMonitorSetPriorityBusy:

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

            aMessage.Complete(KErrNone);

            break;

        case EGOomMonitorSetPriorityNormal:

            aMessage.Complete(KErrNone);

            break;

        case EGOomMonitorSetPriorityHigh:

            aMessage.Complete(KErrNone);

            break;

        case EGoomMonitorAppAboutToStart:

            {

            TInt appUid = aMessage.Int0();

            aMessage.Complete(KErrNone);  

            TRAP_IGNORE(Monitor().HandleFocusedWgChangeL(appUid))

            break;

            }

        case EGoomMonitorAppUsesAbsoluteMemTargets:

            {

            iUseAbsoluteTargets = aMessage.Int0();

            Server().Monitor().SessionInCriticalAllocation(iUseAbsoluteTargets);

            break;

            }    

        default:

            PanicClient(aMessage, EPanicIllegalFunction);

            break;

        }

    }

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

    {

    FUNC_LOG;

    if (!iRequestFreeRam.IsNull())

        {

        if (iFunction == EGOomMonitorRequestOptionalRam)

            {

            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);

        }

    Server().Monitor().SetActiveClient(0);

    }