author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:03:46 +0300 | |
branch | RCL_3 |
changeset 53 | 61bc0f252b2b |
permissions | -rw-r--r-- |
53
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/* |
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* Copyright (c) 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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* |
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*/ |
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|
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#include <QObject> // Compiler flags, keep first |
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#ifdef Q_OS_SYMBIAN |
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#include <coemain.h> |
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#endif // Q_OS_SYMBIAN |
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#include "cxutils.h" |
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#include "cxesysutil.h" |
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#include "cxesettings.h" |
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#include "cxediskmonitor.h" |
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#include "cxediskmonitorprivate.h" |
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|
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|
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namespace |
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{ |
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const int MONITORING_INTERVAL = 2*1000; // in milliseconds |
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const int UNKNOWN = -1; |
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} |
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|
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|
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/*! |
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* Constructor. |
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*/ |
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CxeDiskMonitorPrivate::CxeDiskMonitorPrivate(CxeSettings &settings) |
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: mSettings(settings), |
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mTimer(), |
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#ifdef Q_OS_SYMBIAN |
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mFs(CCoeEnv::Static()->FsSession()), |
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mCameraDrive(CxeSysUtil::getCameraDrive(mFs)), |
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#endif // Q_OS_SYMBIAN |
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mTriggerLevelBytes(UNKNOWN), |
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mLatestFreeBytes(UNKNOWN) |
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{ |
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CX_DEBUG_ENTER_FUNCTION(); |
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CX_DEBUG_EXIT_FUNCTION(); |
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} |
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|
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/*! |
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* Destructor. |
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*/ |
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CxeDiskMonitorPrivate::~CxeDiskMonitorPrivate() |
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{ |
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CX_DEBUG_ENTER_FUNCTION(); |
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stop(); |
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CX_DEBUG_EXIT_FUNCTION(); |
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} |
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|
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/*! |
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* Slot for checking if the available disk space is below warning trigger level. |
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*/ |
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void CxeDiskMonitorPrivate::checkSpace() |
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{ |
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CX_DEBUG_ENTER_FUNCTION(); |
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qint64 previousFree(mLatestFreeBytes); |
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// Get the current free space. |
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mLatestFreeBytes = free(false); |
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// If space has changed during monitoring, signal it now. |
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if (previousFree != mLatestFreeBytes && isMonitoring()) { |
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CX_DEBUG(("CxeDiskMonitorPrivate - Disk space changed %d -> %d bytes", previousFree, mLatestFreeBytes)); |
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emit diskSpaceChanged(); |
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} |
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|
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// Only emit warning if trigger level is set to some positive value. |
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// Otherwise updating cached free space value is enough. |
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if (mTriggerLevelBytes != UNKNOWN && mLatestFreeBytes < mTriggerLevelBytes) { |
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CX_DEBUG(("[WARNING] CxeDiskMonitorPrivate - Disk space low!")); |
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emit diskSpaceLow(); |
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} |
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CX_DEBUG_EXIT_FUNCTION(); |
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} |
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|
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/*! |
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* Set the warning level of free disk space. |
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* When free disk space falls below this limit, diskSpaceLow() signal is emitted. |
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* @param bytes Limit in bytes. |
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*/ |
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void CxeDiskMonitorPrivate::setLowWarningLevel(qint64 bytes) |
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{ |
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mTriggerLevelBytes = bytes; |
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} |
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|
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/*! |
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* Start monitoring disk space. |
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*/ |
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void CxeDiskMonitorPrivate::start() |
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{ |
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if (!mTimer.isActive()) { |
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connect(&mTimer, SIGNAL(timeout()), this, SLOT(checkSpace()), Qt::UniqueConnection); |
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mTimer.start(MONITORING_INTERVAL); |
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} |
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} |
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/*! |
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* Stop monitoring disk space. |
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*/ |
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void CxeDiskMonitorPrivate::stop() |
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{ |
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mTimer.stop(); |
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mLatestFreeBytes = UNKNOWN; |
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} |
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|
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/*! |
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* Is monitoring ongoing at the moment. |
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*/ |
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bool CxeDiskMonitorPrivate::isMonitoring() const |
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{ |
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return mTimer.isActive(); |
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} |
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|
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/*! |
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* Get free disk space for Camera use in bytes. |
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* @param cached Can cached value be used. |
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* If true (default value), value of last constant-interval-check is used (if it exists). |
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* If false (or there's no cached value), forced reading of free space is done now. |
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* This may cause significant delay compared to returning cached value. |
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*/ |
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qint64 CxeDiskMonitorPrivate::free(bool cached) const |
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{ |
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qint64 value(0); |
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if (cached && mLatestFreeBytes != UNKNOWN) { |
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value = mLatestFreeBytes; |
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} else { |
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value = CxeSysUtil::spaceAvailable(mFs, mCameraDrive, mSettings); |
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} |
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return value; |
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} |
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|
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// end of file |