author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 16 Apr 2010 15:50:13 +0300 | |
changeset 18 | 2f34d5167611 |
parent 0 | 1918ee327afb |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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2f34d5167611
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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changeset
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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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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the QtCore module of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include "qsystemsemaphore.h" |
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#include "qsystemsemaphore_p.h" |
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#include "qcoreapplication.h" |
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#include <qdebug.h> |
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QT_BEGIN_NAMESPACE |
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#ifndef QT_NO_SYSTEMSEMAPHORE |
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QSystemSemaphorePrivate::QSystemSemaphorePrivate() : |
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semaphore(0), error(QSystemSemaphore::NoError) |
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{ |
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} |
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void QSystemSemaphorePrivate::setErrorString(const QString &function) |
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{ |
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BOOL windowsError = GetLastError(); |
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if (windowsError == 0) |
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return; |
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switch (windowsError) { |
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case ERROR_NO_SYSTEM_RESOURCES: |
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case ERROR_NOT_ENOUGH_MEMORY: |
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error = QSystemSemaphore::OutOfResources; |
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errorString = QCoreApplication::translate("QSystemSemaphore", "%1: out of resources").arg(function); |
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break; |
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case ERROR_ACCESS_DENIED: |
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error = QSystemSemaphore::PermissionDenied; |
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errorString = QCoreApplication::translate("QSystemSemaphore", "%1: permission denied").arg(function); |
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break; |
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default: |
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errorString = QCoreApplication::translate("QSystemSemaphore", "%1: unknown error %2").arg(function).arg(windowsError); |
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error = QSystemSemaphore::UnknownError; |
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#if defined QSYSTEMSEMAPHORE_DEBUG |
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qDebug() << errorString << "key" << key; |
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#endif |
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} |
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} |
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HANDLE QSystemSemaphorePrivate::handle(QSystemSemaphore::AccessMode) |
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{ |
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// don't allow making handles on empty keys |
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if (key.isEmpty()) |
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return 0; |
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// Create it if it doesn't already exists. |
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if (semaphore == 0) { |
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QString safeName = makeKeyFileName(); |
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semaphore = CreateSemaphore(0, initialValue, MAXLONG, (wchar_t*)safeName.utf16()); |
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if (semaphore == NULL) |
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setErrorString(QLatin1String("QSystemSemaphore::handle")); |
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} |
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return semaphore; |
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} |
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void QSystemSemaphorePrivate::cleanHandle() |
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{ |
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if (semaphore && !CloseHandle(semaphore)) { |
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#if defined QSYSTEMSEMAPHORE_DEBUG |
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qDebug() << QLatin1String("QSystemSemaphorePrivate::CloseHandle: sem failed"); |
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#endif |
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} |
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semaphore = 0; |
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} |
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bool QSystemSemaphorePrivate::modifySemaphore(int count) |
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{ |
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if (0 == handle()) |
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return false; |
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if (count > 0) { |
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if (0 == ReleaseSemaphore(semaphore, count, 0)) { |
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setErrorString(QLatin1String("QSystemSemaphore::modifySemaphore")); |
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#if defined QSYSTEMSEMAPHORE_DEBUG |
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qDebug() << QLatin1String("QSystemSemaphore::modifySemaphore ReleaseSemaphore failed"); |
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#endif |
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return false; |
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} |
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} else { |
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if (WAIT_OBJECT_0 != WaitForSingleObject(semaphore, INFINITE)) { |
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setErrorString(QLatin1String("QSystemSemaphore::modifySemaphore")); |
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#if defined QSYSTEMSEMAPHORE_DEBUG |
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qDebug() << QLatin1String("QSystemSemaphore::modifySemaphore WaitForSingleObject failed"); |
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#endif |
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return false; |
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} |
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} |
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return true; |
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} |
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#endif //QT_NO_SYSTEMSEMAPHORE |
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QT_END_NAMESPACE |