diff options
Diffstat (limited to 'src/corelib/thread/qmutex_win.cpp')
-rw-r--r-- | src/corelib/thread/qmutex_win.cpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/corelib/thread/qmutex_win.cpp b/src/corelib/thread/qmutex_win.cpp new file mode 100644 index 0000000000..3a535c16ab --- /dev/null +++ b/src/corelib/thread/qmutex_win.cpp @@ -0,0 +1,75 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <qt_windows.h> + +#include "qmutex.h" +#include <qatomic.h> +#include "qmutex_p.h" + +QT_BEGIN_NAMESPACE + +QMutexPrivate::QMutexPrivate(QMutex::RecursionMode mode) + : QMutexData(mode), maximumSpinTime(MaximumSpinTimeThreshold), averageWaitTime(0), owner(0), count(0) +{ + event = CreateEvent(0, FALSE, FALSE, 0); + if (!event) + qWarning("QMutexPrivate::QMutexPrivate: Cannot create event"); +} + +QMutexPrivate::~QMutexPrivate() +{ CloseHandle(event); } + +bool QMutexPrivate::wait(int timeout) +{ + if (contenders.fetchAndAddAcquire(1) == 0) { + // lock acquired without waiting + return true; + } + bool returnValue = (WaitForSingleObject(event, timeout < 0 ? INFINITE : timeout) == WAIT_OBJECT_0); + contenders.deref(); + return returnValue; +} + +void QMutexPrivate::wakeUp() +{ SetEvent(event); } + +QT_END_NAMESPACE |