bluetoothengine/btmac/src/btmac/btmpagescanparametersmanager.cpp
author hgs
Fri, 28 May 2010 17:03:06 +0300
changeset 32 19bd632b5100
child 45 b0aebde9b1fb
permissions -rw-r--r--
201021
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// Copyright (c) 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 "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 "btmpagescanparametersmanager.h"
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#include <ctsydomainpskeys.h>
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#include <bt_subscribe.h>
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#include <bt_subscribe_partner.h>
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#include <bttypespartner.h>
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#include "debug.h"
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// in the current configuration an incoming call ringing limit is 30 seconds
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// if for some reason we don't receive the call state change
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// we disable fast connection page scan settings in 35 seconds
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const TInt KFastConnectionTime              = 35000000;
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// a timeout for resetting page scan settings
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// if we don't receive a confirmation we try to reset again
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const TInt KRestoreStandardParametersTime   = 1000000;
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const TInt KCallStateListenerService            = 8;
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const TInt KPageScanParametersListenerService   = 9;
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const TInt KFastConnectionService               = 10;
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const TInt KRestoreStandardParametersService    = 11;
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CBtmPageScanParametersManager::CBtmPageScanParametersManager()
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    :  iIsBeingDeactivated(EFalse)
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    {
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    }
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CBtmPageScanParametersManager::~CBtmPageScanParametersManager()
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    {
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    TRACE_FUNC_ENTRY
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    delete iTimerActive;
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    iTimer.Close();
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    if (iCallStateKey.Handle())
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        {
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        iCallStateKey.Cancel();
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        }
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    delete iPageScanParametersListener;
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    iCallStateKey.Close();
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    if (iPageScanParametersKey.Handle())
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        {
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        iPageScanParametersKey.Cancel();
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        }
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    delete iCallStateListener;
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    iPageScanParametersKey.Close();
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    TRACE_FUNC_EXIT
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    }
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void CBtmPageScanParametersManager::ConstructL()
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    {
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    TRACE_FUNC_ENTRY
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    LEAVE_IF_ERROR(iCallStateKey.Attach(KPSUidCtsyCallInformation, KCTsyCallState));
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    iCallStateListener = CBtmActive::NewL(*this, CActive::EPriorityStandard,
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                                          KCallStateListenerService);
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    LEAVE_IF_ERROR(iPageScanParametersKey.Attach(KPropertyUidBluetoothCategory,
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                                                 KPropertyKeyBluetoothGetPageScanParameters));
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    iPageScanParametersListener = CBtmActive::NewL(*this, CActive::EPriorityStandard,
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                                                   KPageScanParametersListenerService);
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    iTimerActive = CBtmActive::NewL(*this, CActive::EPriorityStandard, KFastConnectionService);
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    TRACE_FUNC_EXIT
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    }
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CBtmPageScanParametersManager* CBtmPageScanParametersManager::NewL()
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    {
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    TRACE_STATIC_FUNC_ENTRY
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    CBtmPageScanParametersManager* self = new( ELeave ) CBtmPageScanParametersManager();
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    CleanupStack::PushL(self);
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    self->ConstructL();
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    CleanupStack::Pop(self);
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    return self;
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    }
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void CBtmPageScanParametersManager::StartTimer(TInt aService, TInt aTimeout)
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    {
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    if (!iTimerActive->IsActive())
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        {
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        TRACE_FUNC_ENTRY
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        iTimer.CreateLocal();
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        iTimer.After(iTimerActive->iStatus, aTimeout);
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        iTimerActive->SetRequestId(aService);
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        iTimerActive->GoActive();
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        TRACE_FUNC_EXIT
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        }
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    else
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        {
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        TRACE_WARNING(_L("WARNING, page scan manager timer is already active"))
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        }
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    }
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void CBtmPageScanParametersManager::StopTimer()
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    {
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    if (iTimerActive->IsActive())
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        {
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        TRACE_FUNC_ENTRY
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        iTimerActive->Cancel();
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        iTimer.Close();
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        TRACE_FUNC_EXIT
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        }
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    }
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void CBtmPageScanParametersManager::RequestCompletedL(CBtmActive& aActive)
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    {
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    TRACE_FUNC_ENTRY
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    TRACE_INFO((_L("request id %d status %d"), aActive.RequestId(), aActive.iStatus.Int()))
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    if (aActive.iStatus.Int() == KErrNone)
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        {
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        switch (aActive.RequestId())
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            {
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            case KCallStateListenerService:
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                {
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                iCallStateKey.Subscribe(aActive.iStatus);
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                aActive.GoActive();
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                TInt callState;
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                TInt ret = iCallStateKey.Get(callState);
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                if (ret == KErrNone)
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                    {
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                    TRACE_INFO((_L("call state received %d"), callState))
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                    if (callState == EPSCTsyCallStateRinging)
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                        {
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                        // an incoming call ringing => switch to fast page scanning
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                        TRACE_INFO((_L("switching to fast page scanning")))
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                        (void) RProperty::Set(KPropertyUidBluetoothCategory,
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                                              KPropertyKeyBluetoothSetPageScanParameters,
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                                              EFastConnectionPageScanParameters);
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                        // we will disable fast page scanning when the timer gets expired
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                        StartTimer(KFastConnectionService, KFastConnectionTime);
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                        }
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                    else if (iTimerActive->IsActive() && iTimerActive->RequestId() == KFastConnectionService)
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                        {
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                        // the incoming call is not ringing anymore => switch to standard page scanning
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                        TRACE_INFO((_L("switching to standard page scanning")))
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                        DisableFastConnection();
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                        }
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                    }
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                break;
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                }
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            case KPageScanParametersListenerService:
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                {
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                iPageScanParametersKey.Subscribe(aActive.iStatus);
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                aActive.GoActive();
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                TInt pageScanParameters;
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                TInt ret = iPageScanParametersKey.Get(pageScanParameters);
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                if (ret == KErrNone)
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                    {
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                    TRACE_INFO((_L("page scan parameters received %d"), pageScanParameters))
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                    if (iTimerActive->IsActive() && iTimerActive->RequestId() == KRestoreStandardParametersService
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                        && pageScanParameters == EStandardPageScanParameters)
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                        {
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                        TRACE_INFO((_L("standard page scan parameters enabled")))
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                        StopTimer();
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                        if (iIsBeingDeactivated)
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                            {
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                            TRACE_INFO((_L("page scan parameters service is stopped")))
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                            iPageScanParametersKey.Cancel();
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                            }
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                        }
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                    }
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                break;
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                }
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            case KFastConnectionService:
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            case KRestoreStandardParametersService:
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                {
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                // try to reset the page scan setting because it hasn't been confirmed yet
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                TRACE_INFO((_L("timer expired, switching to standard page scanning")))
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                DisableFastConnection();
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                break;
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                }
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            default:
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                {
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                TRACE_WARNING(_L("WARNING, unknown service"))
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                break;
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                }
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            }
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        }
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    TRACE_FUNC_EXIT
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    }
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void CBtmPageScanParametersManager::CancelRequest(CBtmActive& aActive)
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    {
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    TRACE_FUNC_ENTRY
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    switch (aActive.RequestId())
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        {
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        case KFastConnectionService:
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        case KRestoreStandardParametersService:
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            {
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            iTimer.Cancel();
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            break;
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            }
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        default:
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            break;
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        }
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    TRACE_FUNC_EXIT
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    }
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void CBtmPageScanParametersManager::DisableFastConnection()
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    {
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    TRACE_FUNC_ENTRY
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    StopTimer();
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    // switch to standard page scanning
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    (void) RProperty::Set(KPropertyUidBluetoothCategory,
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                          KPropertyKeyBluetoothSetPageScanParameters,
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                          EStandardPageScanParameters);
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    // we will disable fast page scanning when the timer gets expired
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    StartTimer(KRestoreStandardParametersService, KRestoreStandardParametersTime);
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    TRACE_FUNC_EXIT
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    }
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void CBtmPageScanParametersManager::Activate()
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    {
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    TRACE_FUNC_ENTRY
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    iIsBeingDeactivated = EFalse;
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    if (!iCallStateListener->IsActive())
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        {
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        iCallStateKey.Subscribe(iCallStateListener->iStatus);
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        iCallStateListener->GoActive();
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        }
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    else
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        {
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        TRACE_WARNING(_L("WARNING, call state is already being listened"))
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        }
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    if (!iPageScanParametersListener->IsActive())
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        {
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        iPageScanParametersKey.Subscribe(iPageScanParametersListener->iStatus);
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        iPageScanParametersListener->GoActive();
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        }
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    else
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        {
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        TRACE_WARNING(_L("WARNING, call state is already being listened"))
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        }
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    TInt callState;
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    TInt err = RProperty::Get(KPSUidCtsyCallInformation, KCTsyCallState, callState);
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    if(err == KErrNone && callState == EPSCTsyCallStateRinging)
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        {
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        // an incoming call already ringing => switch to fast page scanning
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        TRACE_INFO((_L("call is already ringing, switching to fast page scanning")))
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        (void) RProperty::Set(KPropertyUidBluetoothCategory,
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                              KPropertyKeyBluetoothSetPageScanParameters,
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                              EFastConnectionPageScanParameters);
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        // we will disable fast page scanning when the timer gets expired
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        StartTimer(KFastConnectionService, KFastConnectionTime);
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        }
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    TRACE_FUNC_EXIT
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    }
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void CBtmPageScanParametersManager::Deactivate()
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    {
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    TRACE_FUNC_ENTRY
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    iIsBeingDeactivated = ETrue;
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    // stop call state listening
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    iCallStateKey.Cancel();
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    if (iTimerActive->IsActive())
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        {
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        // if fast page scanning is active, disable it
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        // if we're already switching to standard page scanning, do nothing
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        if (iTimerActive->RequestId() == KFastConnectionService)
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            {
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            TRACE_INFO((_L("deactivation started, switching to standard page scanning")))
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            DisableFastConnection();
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            }
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        }
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    else
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        {
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        // if no timer is active we just stop page scan parameters listening
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        iPageScanParametersKey.Cancel();
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        }
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    TRACE_FUNC_EXIT
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    }