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// Copyright (c) 1999-2009 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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// Implementation for a CActive based class that monitors for low disk space
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// and is informed when a PDU is being received. Should memory be too low,
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// an error code is returned causing a NAck. The class will then monitor
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// for the point at which PDUs can be received again, and a Resume Reception
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// will be sent to the network.
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// The are two limits - a high limit for general SMSs and a low limit for
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// class 0 SMSs. However there is only one way to resume reception of SMSs. So
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// once a resume reception is sent, it resumes hoth types of SMSs. The algorithm
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// is a bit simiplier because of this:
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// IF sending non-Class 0 AND we are below the high limit THEN
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// N'Ack SMS
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// IF not waiting for free diskspace THEN
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// Wait for free diskspace to rise above the high limit
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// Resume SMS Reception.
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// ELSE
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// Continue waiting for either high limit or low limit
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// Resume SMS Reception as previously intended
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// END_IF
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// ELSE IF sending Class 0 AND we are below the low limit THEN
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// Wait for free diskspace to rise above the low limit
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// Resume SMS Reception.
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// END_IF
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// Note that in the second and last case, SMS reception may be resumed before
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// we are above the high limit, but in that case montioring will repeat when
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// the next non-class 0 SMS is attempted to be delivered. This is necessary as
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// there is no way to resume just class 0 SMSs.
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//
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//
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/**
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@file
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@internalComponent
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*/
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#include <barsc.h>
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#include <bautils.h>
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#include "smspcomm.h"
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#include "smspmondsk.h"
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#include "smsstacklog.h"
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#include "smspmain.h"
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#include "smspver.h"
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#include <smsu.rsg>
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_LIT(KSmsResourceFile, "sms\\smsu.rsc");
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/**
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* 2 phase constructor.
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*
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* @leave Leaves if not enough memory is available.
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*
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* @return a newly created CSmsMonitorDiskSpace object.
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*/
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CSmsMonitorDiskSpace* CSmsMonitorDiskSpace::NewL(MSmsComm& aSmsComm, RMobileSmsMessaging& aSmsMessaging,RFs& aFs)
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{
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LOGSMSPROT1("CSmsMonitorDiskSpace::NewL()");
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CSmsMonitorDiskSpace* self = new(ELeave) CSmsMonitorDiskSpace(aSmsComm, aSmsMessaging, aFs);
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CleanupStack::PushL(self);
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self->ConstructL();
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CleanupStack::Pop();
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return self;
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} // CSmsMonitorDiskSpace::NewL
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/**
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* Private constructor used in the first phase of construction.
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*/
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CSmsMonitorDiskSpace::CSmsMonitorDiskSpace(MSmsComm& aSmsComm, RMobileSmsMessaging& aSmsMessaging,RFs& aFs)
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: CActive(KSmsSessionPriority),
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iState(ESmsMonitorDiskSpaceIdle),
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iSmsMessaging(aSmsMessaging),
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iFs(aFs),
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iSmsComm(aSmsComm),
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iLowLimit(8*1024),
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iHighLimit(16*1024)
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{
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CActiveScheduler::Add(this);
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} // CSmsMonitorDiskSpace::CSmsMonitorDiskSpace
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/**
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* Destructor. Ensures any outstanding operation is cancelled.
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*/
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CSmsMonitorDiskSpace::~CSmsMonitorDiskSpace()
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{
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Cancel();
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#ifdef _DEBUG
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iFreeDiskSpaceProperty.Close();
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#endif
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} // CSmsMonitorDiskSpace::~CSmsMonitorDiskSpace
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/**
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* Initialize values for LowLimitDiskSpace and HighLimitDiskSpace
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* from resource file
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*/
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void CSmsMonitorDiskSpace::ConstructL()
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{
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RResourceFile resourceFile;
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TFileName fileName;
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Dll::FileName(fileName);
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TParse parse;
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TFileName resourceFileName;
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//
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// Create the path to the resource file...
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//
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iFs.PrivatePath(resourceFileName);
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resourceFileName.Append(KSmsResourceFile);
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parse.Set(resourceFileName, &fileName, 0);
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fileName = parse.FullName();
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BaflUtils::NearestLanguageFile(iFs, fileName);
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//
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// To enable adequate CSmsMonitorDiskSpace testing we allow the SMSU.RSC
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// file to be loaded from the C: drive if it exists. This is only for a
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// DEBUG version of course! Later WINSCW is also added to allow the testing
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// on WINSCW UREL version.
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//
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#if (defined __WINSCW__) || (defined _DEBUG)
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TUint attValue;
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TChar oldDriveLetter = fileName[0];
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//
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// Change the filename to look on C: and then see if it exists...
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//
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fileName[0] = 'C';
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if (iFs.Att(fileName, attValue) != KErrNone)
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{
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//
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// The file does not exist on C: so revert the change...
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//
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fileName[0] = oldDriveLetter;
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}
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#endif
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//
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// Log the filename in use and whether it is ROM based...
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//
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#ifdef _SMS_LOGGING_ENABLED
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TBuf8<KMaxFileName> buf8;
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buf8.Copy(fileName);
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LOGSMSPROT2("CSmsMonitorDiskSpace::ConstructL(): fileName=\"%S\"", &buf8);
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#endif
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if (iFs.IsFileInRom(fileName) == NULL)
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{
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LOGSMSPROT1("CSmsMonitorDiskSpace::ConstructL(): Smsu.rsc not in ROM");
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}
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//
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// Read the low and high limits...
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//
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TResourceReader reader;
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HBufC8* buf;
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resourceFile.OpenL(iFs, fileName);
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CleanupClosePushL(resourceFile);
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buf = resourceFile.AllocReadLC(R_LOWLIMIT_DISKSPACE_HOLDER);
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reader.SetBuffer(buf);
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iLowLimit = reader.ReadInt32();
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CleanupStack::PopAndDestroy(buf);
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buf = resourceFile.AllocReadLC(R_HIGHLIMIT_DISKSPACE_HOLDER);
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reader.SetBuffer(buf);
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iHighLimit=reader.ReadInt32();
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CleanupStack::PopAndDestroy(buf);
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CleanupStack::PopAndDestroy(&resourceFile);
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#ifdef _DEBUG
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TInt freeSpace;
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TInt err = RProperty::Get(KUidPSSMSStackCategory, KUidPSSMSStackFreeDiskSpaceKey, freeSpace);
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if (err == KErrNone)
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{
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iInOODTesting = ETrue;
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TInt ret = iFreeDiskSpaceProperty.Attach(KUidPSSMSStackCategory, KUidPSSMSStackFreeDiskSpaceKey);
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if (ret != KErrNone)
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{
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LOGSMSPROT2("iFreeDiskSpaceProperty.Attach(): error=%d", ret);
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User::Leave(ret);
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}
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}
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#endif
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LOGSMSPROT3("CSmsMonitorDiskSpace::ConstructL(): iLowLimit=%d, iHighLimit=%d",
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iLowLimit, iHighLimit);
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} // CSmsMonitorDiskSpace::ConstructL
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/**
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* Handles a completed disk monitor or resume request.
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*/
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void CSmsMonitorDiskSpace::RunL()
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{
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LOGSMSPROT3("CSmsMonitorDiskSpace:RunL(): iStatus=%d, iState=%d",
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iStatus.Int(), iState );
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switch (iState)
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{
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case ESmsMonitorDiskSpaceMonitorLowLimit:
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{
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iState = ESmsMonitorDiskSpaceIdle;
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//
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// If the disk space has gone above the low limit, then
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// resume reception. Otherwise (assuming the notify was
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// successful) then start monitoring the low limit again...
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//
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TInt freeDiskSpace = GetFreeDiskSpace();
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if (freeDiskSpace >= iLowLimit)
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{
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ResumeSmsReception();
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}
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else if (iStatus.Int() == KErrNone)
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{
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NotifyDiskSpace(iLowLimit, ESmsMonitorDiskSpaceMonitorLowLimit);
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}
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}
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break;
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case ESmsMonitorDiskSpaceMonitorHighLimit:
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{
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iState = ESmsMonitorDiskSpaceIdle;
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//
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// If the disk space has gone above the high limit, then
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// resume reception. Otherwise (assuming the notify was
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// successful) then start monitoring the high limit again...
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//
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TInt freeDiskSpace = GetFreeDiskSpace();
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if (freeDiskSpace >= iHighLimit)
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{
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ResumeSmsReception();
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}
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else if (iStatus.Int() == KErrNone)
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{
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NotifyDiskSpace(iHighLimit, ESmsMonitorDiskSpaceMonitorHighLimit);
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}
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}
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break;
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case ESmsMonitorDiskSpaceResumeReception:
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{
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//
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// We are finished. However, check if any N'Acks were sent between
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// the time we began the resume and now incase we need to restart
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// the monitoring.
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//
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if (iNAckdClassZero)
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{
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NotifyDiskSpace(iLowLimit, ESmsMonitorDiskSpaceMonitorLowLimit);
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}
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else if (iNAckdClassOther)
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{
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NotifyDiskSpace(iHighLimit, ESmsMonitorDiskSpaceMonitorHighLimit);
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}
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else
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{
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iState = ESmsMonitorDiskSpaceIdle;
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}
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}
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break;
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default:
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{
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SmspPanic(KSmspPanicUnexpectedState);
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}
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break;
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}
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} // CSmsMonitorDiskSpace::RunL
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/**
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* Handles a request to cancel the current state machine operation.
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*/
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void CSmsMonitorDiskSpace::DoCancel()
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{
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LOGSMSPROT2("CSmsMonitorDiskSpace::DoCancel(): iState=%d", iState);
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switch (iState)
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{
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case ESmsMonitorDiskSpaceIdle:
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{
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// NOP
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}
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break;
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case ESmsMonitorDiskSpaceMonitorLowLimit:
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case ESmsMonitorDiskSpaceMonitorHighLimit:
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{
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#ifdef _DEBUG
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if (iInOODTesting)
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{
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iFreeDiskSpaceProperty.Cancel();
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}
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else
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#endif
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{
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iFs.NotifyDiskSpaceCancel();
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}
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}
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break;
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case ESmsMonitorDiskSpaceResumeReception:
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{
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iSmsMessaging.CancelAsyncRequest(EMobileSmsMessagingResumeSmsReception);
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}
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break;
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default:
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{
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SmspPanic(KSmspPanicUnexpectedState);
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}
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}
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iState = ESmsMonitorDiskSpaceIdle;
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} // CSmsMonitorDiskSpace::DoCancel
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/**
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* Checks for enough disk space, and starts monitoring disk space if needed.
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*/
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void CSmsMonitorDiskSpace::CheckDiskSpaceForPDUL(TBool aPDUIsClass0)
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{
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LOGSMSPROT2("CSmsMonitorDiskSpace::CheckDiskSpaceForPDUL(): aPDUIsClass0=%d",
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aPDUIsClass0);
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//
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// First check the actual disk space before working out what to do.
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//
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// If enough space exists, then we don't need to do anything else (even if
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// we where previously monitoring, because that will be handled later as
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// it would without this function call).
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//
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TInt freeDiskSpace = GetFreeDiskSpace();
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if (freeDiskSpace >= iHighLimit ||
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(freeDiskSpace >= iLowLimit && aPDUIsClass0))
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{
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//
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// There is enough space for the PDU, so nothing more to do.
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//
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return;
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}
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//
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// There is not enough diskspace so record that a PDU will be N'Ack'd.
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//
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if (aPDUIsClass0)
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{
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iNAckdClassZero = ETrue;
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}
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else
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{
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iNAckdClassOther = ETrue;
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}
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//
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// Ensure we are monitoring the disk space. This will then cause a
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// ResumeReception() to be sent when the disk space increases above the
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// appropriate limit.
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//
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if (freeDiskSpace < iLowLimit)
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{
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//
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// Start montioring the low limit, if not already monitoring or if
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// we are currently monitoring the high limit.
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//
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if (iState == ESmsMonitorDiskSpaceIdle ||
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iState == ESmsMonitorDiskSpaceMonitorHighLimit)
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{
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NotifyDiskSpace(iLowLimit, ESmsMonitorDiskSpaceMonitorLowLimit);
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}
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}
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else // (freeDiskSpace < iHighLimit)
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{
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//
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// Start monitoring the high limit if not already monitoring...
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//
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if (iState == ESmsMonitorDiskSpaceIdle)
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{
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NotifyDiskSpace(iHighLimit, ESmsMonitorDiskSpaceMonitorHighLimit);
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}
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}
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//
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// Imform the caller that the SMS should be N'Ack'd...
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//
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User::Leave(KErrDiskFull);
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} // CSmsMonitorDiskSpace::CheckDiskSpaceForPDUL
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/**
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* Starts monitoring the free disk space to spot when it rises above the
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* requested limit.
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*
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* Unfortunately the File System API does not distiguish between going below
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* or above a limit, so some checking is needed to ensure that the correct
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* behaviour is requested, since it is possible in theory for the disk space
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* to change between the calls.
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*
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* In theory this is unlikely since the priority of the SMS Stack is higher
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* but not impossible to happen. We guard against it anyway since the mere
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* fact it could happen poses questions when the defects come in from handsets.
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*
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* @note The current disk space is assumed to be below the limit requested.
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* If it is found to be above, this will cause an imediate completion.
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*
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* @param aLimit Limit to monitor.
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* @param aState State to transition to when this request is made.
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*/
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void CSmsMonitorDiskSpace::NotifyDiskSpace(TInt aLimit,
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TSmsMonitorDiskSpaceState aState)
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{
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LOGSMSPROT3("CSmsMonitorDiskSpace::NotifyDiskSpace(): aLimit=%d, aState=%d",
|
|
442 |
aLimit, aState);
|
|
443 |
|
|
444 |
//
|
|
445 |
// Cancel any previously outstanding requests...
|
|
446 |
//
|
|
447 |
if (iState != ESmsMonitorDiskSpaceIdle)
|
|
448 |
{
|
|
449 |
Cancel();
|
|
450 |
}
|
|
451 |
|
|
452 |
//
|
|
453 |
// Start the notification...
|
|
454 |
//
|
|
455 |
iState = aState;
|
|
456 |
|
|
457 |
#ifdef _DEBUG
|
|
458 |
if (iInOODTesting)
|
|
459 |
{
|
|
460 |
iFreeDiskSpaceProperty.Subscribe(iStatus);
|
|
461 |
}
|
|
462 |
else
|
|
463 |
#endif
|
|
464 |
{
|
|
465 |
iFs.NotifyDiskSpace(aLimit, EDriveC, iStatus);
|
|
466 |
}
|
|
467 |
|
|
468 |
iSmsComm.DiskSpaceMonitorStateChange(ESmsDiskSpaceFull);
|
|
469 |
SetActive();
|
|
470 |
|
|
471 |
//
|
|
472 |
// Now, as a sanity check, check the diskspace again. If the disk space
|
|
473 |
// has advanced above the limit in the time between the request and now,
|
|
474 |
// or since the last call to GetFreeDiskSpace() then the request will
|
|
475 |
// either be invalid, or have completed. If either of these are the case
|
|
476 |
// we need to control the situation and ensure a completion occurs...
|
|
477 |
//
|
|
478 |
TInt freeDiskSpace = GetFreeDiskSpace();
|
|
479 |
|
|
480 |
if (freeDiskSpace > aLimit)
|
|
481 |
{
|
|
482 |
//
|
|
483 |
// Cancel the request...
|
|
484 |
//
|
|
485 |
Cancel();
|
|
486 |
|
|
487 |
//
|
|
488 |
// Force a fake completion for this state...
|
|
489 |
//
|
|
490 |
TRequestStatus* status = &iStatus;
|
|
491 |
|
|
492 |
iState = aState;
|
|
493 |
iStatus = KRequestPending;
|
|
494 |
SetActive();
|
|
495 |
User::RequestComplete(status, KErrNone);
|
|
496 |
}
|
|
497 |
} // CSmsMonitorDiskSpace::NotifyDiskSpace
|
|
498 |
|
|
499 |
|
|
500 |
/**
|
|
501 |
* Performs the required actions for the case when leaving either the low
|
|
502 |
* limit or the high limit. It doesn't really matter which limit you are
|
|
503 |
* leaving since the resume applies for all SMSs. This gives three scenarios:
|
|
504 |
*
|
|
505 |
* 1) You leave the high limit. This is not a problem as all SMSs can
|
|
506 |
* now be received.
|
|
507 |
* 2) You leave the low limit and go above the high limit. This is also
|
|
508 |
* not a problem as all SMSs can be received.
|
|
509 |
* 3) You leave the low limit but stay below the high limit. In this case
|
|
510 |
* the N'Ack'd SMS was class 0 and you can now receive it. A non-class 0
|
|
511 |
* SMS may attempt to be delivered, but monitoring will restart as
|
|
512 |
* before. So again no problem.
|
|
513 |
*/
|
|
514 |
void CSmsMonitorDiskSpace::ResumeSmsReception()
|
|
515 |
{
|
|
516 |
LOGSMSPROT1("CSmsMonitorDiskSpace::ResumeSmsReception");
|
|
517 |
|
|
518 |
//
|
|
519 |
// Cancel any previously outstanding requests...
|
|
520 |
//
|
|
521 |
if (iState != ESmsMonitorDiskSpaceIdle)
|
|
522 |
{
|
|
523 |
Cancel();
|
|
524 |
}
|
|
525 |
|
|
526 |
//
|
|
527 |
// Clear the N'Ackd flags...
|
|
528 |
//
|
|
529 |
iNAckdClassZero = EFalse;
|
|
530 |
iNAckdClassOther = EFalse;
|
|
531 |
|
|
532 |
//
|
|
533 |
// Start the resume request...
|
|
534 |
//
|
|
535 |
iState = ESmsMonitorDiskSpaceResumeReception;
|
|
536 |
iSmsMessaging.ResumeSmsReception(iStatus);
|
|
537 |
iSmsComm.DiskSpaceMonitorStateChange(ESmsDiskSpaceAvailable);
|
|
538 |
SetActive();
|
|
539 |
} // CSmsMonitorDiskSpace::ResumeSmsReception
|
|
540 |
|
|
541 |
|
|
542 |
/**
|
|
543 |
* Utilility function to determine amount of free disk space. The actual
|
|
544 |
* free space is limited at 2GB.
|
|
545 |
*/
|
|
546 |
TInt CSmsMonitorDiskSpace::GetFreeDiskSpace()
|
|
547 |
{
|
|
548 |
TVolumeInfo volumeInfo;
|
|
549 |
TInt ret;
|
|
550 |
|
|
551 |
#ifdef _DEBUG
|
|
552 |
if( iInOODTesting )
|
|
553 |
{
|
|
554 |
TInt value = 0;
|
|
555 |
ret = iFreeDiskSpaceProperty.Get(value);
|
|
556 |
|
|
557 |
// update volumeInfo with value regardless of error as error handled later
|
|
558 |
volumeInfo.iFree = value;
|
|
559 |
}
|
|
560 |
else
|
|
561 |
#endif
|
|
562 |
{
|
|
563 |
ret = iFs.Volume(volumeInfo, EDriveC);
|
|
564 |
}
|
|
565 |
|
|
566 |
//
|
|
567 |
// Get the volume info for drive C:...
|
|
568 |
//
|
|
569 |
|
|
570 |
if (ret != KErrNone)
|
|
571 |
{
|
|
572 |
LOGSMSPROT2("CSmsMonitorDiskSpace::GetFreeDiskSpace(): error=%d", ret);
|
|
573 |
return KErrGeneral;
|
|
574 |
}
|
|
575 |
|
|
576 |
//
|
|
577 |
// Convert the disk space value to a TInt (allowing 2GB limits)...
|
|
578 |
//
|
|
579 |
TInt freeSpace;
|
|
580 |
|
|
581 |
if (volumeInfo.iFree >= 0x7fffffff)
|
|
582 |
{
|
|
583 |
freeSpace = 0x7fffffff;
|
|
584 |
}
|
|
585 |
else
|
|
586 |
{
|
|
587 |
freeSpace = (TInt) volumeInfo.iFree;
|
|
588 |
}
|
|
589 |
|
|
590 |
LOGSMSPROT2("CSmsMonitorDiskSpace::GetFreeDiskSpace(): freeSpace=%d", freeSpace);
|
|
591 |
|
|
592 |
return freeSpace;
|
|
593 |
} // CSmsMonitorDiskSpace::GetFreeDiskSpace
|