97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Qt Software Information (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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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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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
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** additional rights. These rights are described in the Nokia Qt LGPL
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** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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** package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at qt-sales@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qplatformdefs.h"
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#include "qmutex.h"
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#include "qstring.h"
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#ifndef QT_NO_THREAD
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#include "qmutex_p.h"
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#include "qthread.h"
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#include <base/env.h>
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#include <timer_session/client.h>
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QMutexPrivate::QMutexPrivate(QMutex::RecursionMode mode)
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: QMutexData(mode), maximumSpinTime(MaximumSpinTimeThreshold), averageWaitTime(0), owner(0), count(0)
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{
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}
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QMutexPrivate::~QMutexPrivate()
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{
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}
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bool QMutexPrivate::wait(int timeout)
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{
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bool result;
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if (contenders.fetchAndAddAcquire(1) == 0) {
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// lock acquired without waiting
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return true;
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}
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if (timeout == 0) {
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result = false; /* timed out */
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} else if (timeout < 0) {
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sem.down();
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result = true; /* woken up */
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} else {
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try {
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sem.down(timeout);
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result = true;
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} catch(Genode::Timeout_exception) {
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result = false;
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}
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}
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contenders.deref();
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return result;
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}
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void QMutexPrivate::wakeUp()
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{
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sem.up();
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}
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#endif // QT_NO_THREAD
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