--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/camerauis/cameraapp/generic/src/CamMemoryMonitor.cpp	Thu Jan 07 16:18:56 2010 +0200
@@ -0,0 +1,288 @@
+/*
+* Copyright (c) 2007-2009 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:  Class that monitors free memory and attempts to free it if necessary
+*
+*/
+
+#include "CamMemoryMonitor.h"
+
+
+#include <hal.h>
+#include <hal_data.h>
+#include <AknGlobalNote.h>
+#include <StringLoader.h>
+#include <vgacamsettings.rsg>
+#include "CamAppUi.h"
+#include "CamAppController.h"
+#include "camlogging.h"
+
+
+const static TInt KMemoryCheckInterval = 10*1000*1000;
+const static TInt KNeededMemoryLevel = 20*1024*1024;
+const static TInt KCriticalMemoryLevel = 18*1024*1024;
+
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::NewL
+// ---------------------------------------------------------------------------
+//
+CCamMemoryMonitor* CCamMemoryMonitor::NewL(CCamAppUi* aAppUi, CCamAppController* aController)
+    {
+    CCamMemoryMonitor* self = new (ELeave) CCamMemoryMonitor( aAppUi, aController );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop(); // self;
+    return self;
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::~CCamMemoryMonitor
+// ---------------------------------------------------------------------------
+//
+CCamMemoryMonitor::~CCamMemoryMonitor()
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::~CCamMemoryMonitor") )
+    if ( iMemoryCheckTimer )
+        {
+        iMemoryCheckTimer->Cancel();
+        delete iMemoryCheckTimer;
+        }
+    PRINT( _L("Camera <= CCamMemoryMonitor::~CCamMemoryMonitor") )
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::StartMonitoring
+// ---------------------------------------------------------------------------
+//
+void CCamMemoryMonitor::StartMonitoring( TInt aLimit, TInt aRequestAmount )
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::StartMonitoring") )
+    if ( !iMemoryCheckTimer->IsActive() )
+        {
+        iLimit = aLimit;
+        iRequestAmount = aRequestAmount;
+        iMemoryCheckTimer->Start( KMemoryCheckInterval, KMemoryCheckInterval,
+                              TCallBack( MemoryCheck, this ) );
+        }
+    PRINT( _L("Camera <= CCamMemoryMonitor::StartMonitoring") )
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::StartMonitoring
+// ---------------------------------------------------------------------------
+//
+void CCamMemoryMonitor::StartMonitoring()
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::StartMonitoring") )
+    if ( !iMemoryCheckTimer->IsActive() )
+        {
+        iMemoryCheckTimer->Start( KMemoryCheckInterval, KMemoryCheckInterval,
+                              TCallBack( MemoryCheck, this ) );
+        }
+    PRINT( _L("Camera <= CCamMemoryMonitor::StartMonitoring") )
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::StopMonitoring
+// ---------------------------------------------------------------------------
+//
+void CCamMemoryMonitor::StopMonitoring()
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::StopMonitoring") )
+    iMemoryCheckTimer->Cancel();
+    PRINT( _L("Camera <= CCamMemoryMonitor::StopMonitoring") )
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::CheckAndRequestMemoryL
+// ---------------------------------------------------------------------------
+//
+TInt CCamMemoryMonitor::CheckAndRequestMemoryL( TInt aLimit, TInt aRequestAmount, TBool aShowNote )
+    {
+
+    PRINT( _L("Camera => CCamMemoryMonitor::CheckAndRequestMemoryL") )
+    if ( IsActive() )
+    {
+        return KErrNone;
+    }
+
+    TInt memoryLeft = 0;
+    TInt errorCode = KErrNone;
+    HAL::Get( HALData::EMemoryRAMFree, memoryLeft );
+    if ( memoryLeft < aLimit )
+        {
+        PRINT( _L("Camera <> CCamMemoryMonitor::CheckAndRequestMemoryL memory below limit, requesting") )
+        HBufC* freeMemText = NULL;
+        CAknGlobalNote* note = NULL;
+        TInt noteId = 0;
+        if ( aShowNote )
+            {
+
+            freeMemText = StringLoader::LoadL( R_NOTE_TEXT_FREE_MEMORY );
+            CleanupStack::PushL( freeMemText );
+            // show error note
+            note = CAknGlobalNote::NewL();
+            CleanupStack::PushL( note );
+
+            note->SetTextProcessing( ETrue );
+            note->SetPriority(CActive::EPriorityHigh);
+            noteId = note->ShowNoteL(EAknGlobalWaitNote, *freeMemText);
+            }
+
+        User::LeaveIfError( iOomMonitor.Connect() );
+
+        errorCode = iOomMonitor.RequestFreeMemory( aRequestAmount );
+        if ( errorCode != KErrNone )
+            {
+            // try one more time
+            PRINT( _L("Camera <> CCamMemoryMonitor::CheckAndRequestMemoryL request returned with error, let's try one more time") )
+            errorCode = iOomMonitor.RequestFreeMemory( aRequestAmount );
+            }
+        iOomMonitor.Close();
+
+
+        if ( aShowNote )
+            {
+            note->CancelNoteL(noteId);
+            CleanupStack::PopAndDestroy( 2 ); // freeMemText & note
+            }
+        }
+
+    PRINT1( _L("Camera <= CCamMemoryMonitor::CheckAndRequestMemoryL returning %d"), errorCode )
+    return errorCode;
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::CheckAndRequestMemoryL
+// ---------------------------------------------------------------------------
+//
+TInt CCamMemoryMonitor::CheckAndRequestMemoryL( TBool aShowNote )
+    {
+    return CheckAndRequestMemoryL( KCriticalMemoryLevel, KNeededMemoryLevel, aShowNote );
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::RunL
+// ---------------------------------------------------------------------------
+//
+void CCamMemoryMonitor::RunL()
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::RunL") )
+    iOomMonitor.Close();
+    PRINT( _L("Camera <= CCamMemoryMonitor::RunL") )
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::DoCancel
+// ---------------------------------------------------------------------------
+//
+void CCamMemoryMonitor::DoCancel()
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::DoCancel") )
+    if ( IsActive() )
+        {
+        iOomMonitor.CancelRequestFreeMemory();
+        iOomMonitor.Close();
+        }
+    PRINT( _L("Camera <= CCamMemoryMonitor::DoCancel") )
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::CCamMemoryMonitor
+// ---------------------------------------------------------------------------
+//
+CCamMemoryMonitor::CCamMemoryMonitor(CCamAppUi* aAppUi, CCamAppController* aController)
+: CActive( CActive::EPriorityIdle ),
+  iLimit( KCriticalMemoryLevel ), iRequestAmount( KNeededMemoryLevel ),
+  iAppUi( aAppUi ), iController( aController )
+
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::CCamMemoryMonitor") )
+    CActiveScheduler::Add(this);
+    PRINT( _L("Camera <= CCamMemoryMonitor::CCamMemoryMonitor") )
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::ConstructL
+// ---------------------------------------------------------------------------
+//
+void CCamMemoryMonitor::ConstructL()
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::ConstructL") )
+    iMemoryCheckTimer = CPeriodic::New( CActive::EPriorityIdle );
+    PRINT( _L("Camera <= CCamMemoryMonitor::ConstructL") )
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::MemoryCheck
+// ---------------------------------------------------------------------------
+//
+TInt CCamMemoryMonitor::MemoryCheck( TAny* aPtr )
+    {
+
+    PRINT( _L("Camera => CCamMemoryMonitor::MemoryCheck") )
+    CCamMemoryMonitor* self = static_cast<CCamMemoryMonitor*>( aPtr );
+
+    self->CheckMemory();
+
+    PRINT( _L("Camera <= CCamMemoryMonitor::MemoryCheck") )
+    return KErrNone;
+    }
+
+// ---------------------------------------------------------------------------
+// CCamMemoryMonitor::CheckMemory
+// ---------------------------------------------------------------------------
+//
+void CCamMemoryMonitor::CheckMemory()
+    {
+    PRINT( _L("Camera => CCamMemoryMonitor::CheckMemory") )
+    if ( IsActive() )
+        {
+        PRINT( _L("Camera <= CCamMemoryMonitor::CheckMemory already requesting memory") )
+        return;
+        }
+
+    if ( iAppUi->CurrentViewState() == ECamViewStatePreCapture &&
+         iController->CurrentOperation() == ECamNoOperation &&
+         !iAppUi->AppInBackground( EFalse ) )
+        {
+        PRINT( _L("Camera <> CCamMemoryMonitor::CheckMemory checking memory") )
+        TInt memoryLeft = 0;
+        HAL::Get( HALData::EMemoryRAMFree, memoryLeft );
+        if ( memoryLeft < iLimit )
+            {
+            TInt err =  iOomMonitor.Connect();
+            if ( !err )
+                {
+                PRINT( _L("Camera <> CCamMemoryMonitor::CheckMemory requesting memory") )
+                iOomMonitor.RequestFreeMemory( iRequestAmount, iStatus );
+                SetActive();
+                }
+            else
+                {
+                PRINT1( _L("Camera <> CCamMemoryMonitor::CheckMemory failed to connect to OoMMonitor err=%d"), err )
+                }
+            }
+        else
+            {
+            PRINT( _L("Camera <> CCamMemoryMonitor::CheckMemory no need for memory request") )
+            }
+        }
+    else
+        {
+        PRINT( _L("Camera <> CCamMemoryMonitor::CheckMemory not in correct state, not checking memory") )
+        }
+
+    PRINT( _L("Camera <= CCamMemoryMonitor::CheckMemory") )
+    }