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/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qplatformdefs.h"
#include "qmutex.h"
#if !defined(QT_NO_THREAD)
#include "qmutex_p.h"
#include <mach/mach.h>
#include <mach/task.h>
#include <errno.h>
QT_BEGIN_NAMESPACE
QMutexPrivate::QMutexPrivate(QMutex::RecursionMode mode)
: recursive(mode == QMutex::Recursive)
{
kern_return_t r = semaphore_create(mach_task_self(), &mach_semaphore, SYNC_POLICY_FIFO, 0);
if (r != KERN_SUCCESS)
qWarning("QMutex: failed to create semaphore, error %d", r);
}
QMutexPrivate::~QMutexPrivate()
{
kern_return_t r = semaphore_destroy(mach_task_self(), mach_semaphore);
if (r != KERN_SUCCESS)
qWarning("QMutex: failed to destroy semaphore, error %d", r);
}
bool QMutexPrivate::wait(int timeout)
{
kern_return_t r;
if (timeout < 0) {
do {
r = semaphore_wait(mach_semaphore);
} while (r == KERN_ABORTED);
Q_ASSERT(r == KERN_SUCCESS);
} else {
mach_timespec_t ts;
ts.tv_nsec = ((timeout % 1000) * 1000) * 1000;
ts.tv_sec = (timeout / 1000);
r = semaphore_timedwait(mach_semaphore, ts);
}
return (r == KERN_SUCCESS);
}
void QMutexPrivate::wakeUp()
{
semaphore_signal(mach_semaphore);
}
QT_END_NAMESPACE
#endif //QT_NO_THREAD
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