internetradio2.0/uisrc/irdiskspacewatcher.cpp
changeset 0 09774dfdd46b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/internetradio2.0/uisrc/irdiskspacewatcher.cpp	Mon Apr 19 14:01:53 2010 +0300
@@ -0,0 +1,165 @@
+/*
+* Copyright (c) 2004 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:  Performs disk space watching.
+*
+*/
+
+
+#include    <f32file.h>
+
+#include    "irdebug.h"
+#include    "irdiskspacewatcher.h"
+#include    "irdiskspacesession.h"
+
+
+// ---------------------------------------------------------------------------
+// C++ default constructor can NOT contain any code, that might leave.
+// ---------------------------------------------------------------------------
+//
+CIRDiskSpaceWatcher::CIRDiskSpaceWatcher( const TInt64& aCriticalLevel, 
+        MIRDiskSpaceWatcherObserver& aDiskSpaceWatcherObserver ) :
+        iCriticalLevel( aCriticalLevel ), 
+        iObserver ( aDiskSpaceWatcherObserver )
+    {
+    }
+
+// ---------------------------------------------------------------------------
+// EPOC default constructor can leave.
+// ---------------------------------------------------------------------------
+//
+void CIRDiskSpaceWatcher::ConstructL()
+    {
+    User::LeaveIfError(iFs.Connect());
+    }
+
+
+// ---------------------------------------------------------------------------
+// Two-phased constructor.
+// ---------------------------------------------------------------------------
+//
+CIRDiskSpaceWatcher* CIRDiskSpaceWatcher::NewL( const TInt64& aCriticalLevel, 
+        MIRDiskSpaceWatcherObserver& aDiskSpaceWatcherObserver )
+    
+    {
+    CIRDiskSpaceWatcher* self = new( ELeave ) CIRDiskSpaceWatcher( aCriticalLevel, 
+        aDiskSpaceWatcherObserver );
+    
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop(self);
+
+    return self;
+    }
+
+
+// ---------------------------------------------------------------------------
+// Destructor
+// ---------------------------------------------------------------------------
+//
+CIRDiskSpaceWatcher::~CIRDiskSpaceWatcher()
+    {   
+    iDiskSpaceSessions.ResetAndDestroy();
+    iDiskSpaceSessions.Close();
+    iFs.Close();
+    }
+
+
+// ---------------------------------------------------------------------------
+// Returns ETrue if below the critical level in defined disk, otherwise EFalse
+// ---------------------------------------------------------------------------
+//
+TBool CIRDiskSpaceWatcher::IsBelowCriticalLevel( 
+        const TDriveNumber& aDriveNumber ) const
+    {
+    TBool returnValue = EFalse; 
+ 
+    if ( iDiskSpaceSessions.Count() > 0 )
+        {        
+        CIRDiskSpaceSession* session = iDiskSpaceSessions[0];
+        returnValue = session->IsBelowCriticalLevel( aDriveNumber );
+        }
+
+    return returnValue;
+    }
+
+
+// ---------------------------------------------------------------------------
+// CIRDiskSpaceWatcher::StartObservingDriveL
+// ---------------------------------------------------------------------------
+//
+void CIRDiskSpaceWatcher::StartObservingDriveL( 
+        const TDriveNumber& aDriveNumber )
+    {
+    TBool found = EFalse;
+
+    for ( TInt i = 0 ; i < iDiskSpaceSessions.Count() ; i++ )
+        {
+        CIRDiskSpaceSession* session = iDiskSpaceSessions[i];
+        if ( session->DriveNumber() == aDriveNumber )
+            {
+            session->SetObserverCount( session->ObserverCount() + 1 );
+            found = ETrue;
+            /*lint -save -e960 (Note -- Violates MISRA Required Rule 58, non-switch break used)*/
+            break;
+            /*lint -restore*/
+            }
+        }
+    if ( !found )
+        {
+        CIRDiskSpaceSession* session = CIRDiskSpaceSession::NewL( *this, 
+            aDriveNumber, iCriticalLevel, iFs );
+        session->SetObserverCount( 1 );
+        iDiskSpaceSessions.Append( session );
+        }
+    }
+
+
+// ---------------------------------------------------------------------------
+// CIRDiskSpaceWatcher::StopObservingDrive
+// ---------------------------------------------------------------------------
+//
+void CIRDiskSpaceWatcher::StopObservingDrive( 
+        const TDriveNumber& aDriveNumber )     
+    {
+    for ( TInt i = 0 ; i < iDiskSpaceSessions.Count() ; i++ )
+        {
+        CIRDiskSpaceSession* session = iDiskSpaceSessions[i];
+        if ( session->DriveNumber() == aDriveNumber )
+            {
+            session->SetObserverCount( session->ObserverCount() - 1 );
+            if ( session->ObserverCount() == 0 )
+                {
+                iDiskSpaceSessions.Remove( i );
+                delete session;
+                session = NULL;
+                }
+            /*lint -save -e960 (Note -- Violates MISRA Required Rule 58, non-switch break used)*/
+            break;
+            /*lint -restore*/
+            }
+        }
+    
+    }
+
+    
+// ---------------------------------------------------------------------------
+// From class MIRDiskSpaceWatcherObserver.
+// CIRDiskSpaceWatcher::NotifyLowDiskSpaceL
+// ---------------------------------------------------------------------------
+//
+void CIRDiskSpaceWatcher::NotifyLowDiskSpaceL()
+    {
+    IRRDEBUG2("CIRDiskSpaceWatcher::NotifyLowDiskSpaceL - Phone LOW MEMORY detected", KNullDesC);
+    iObserver.NotifyLowDiskSpaceL();
+    }