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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qplatformdefs.h"
#include "qmutex.h"
#include "qstring.h"
#include "qelapsedtimer.h"
#ifndef QT_NO_THREAD
#include "qatomic.h"
#include "qmutex_p.h"
#include <errno.h>
#include <sys/time.h>
#include <time.h>
#if defined(Q_OS_VXWORKS) && defined(wakeup)
#undef wakeup
#endif
QT_BEGIN_NAMESPACE
static void report_error(int code, const char *where, const char *what)
{
if (code != 0)
qWarning("%s: %s failure: %s", where, what, qPrintable(qt_error_string(code)));
}
QMutexPrivate::QMutexPrivate()
: wakeup(false)
{
report_error(pthread_mutex_init(&mutex, NULL), "QMutex", "mutex init");
qt_initialize_pthread_cond(&cond, "QMutex");
}
QMutexPrivate::~QMutexPrivate()
{
report_error(pthread_cond_destroy(&cond), "QMutex", "cv destroy");
report_error(pthread_mutex_destroy(&mutex), "QMutex", "mutex destroy");
}
bool QMutexPrivate::wait(int timeout)
{
report_error(pthread_mutex_lock(&mutex), "QMutex::lock", "mutex lock");
int errorCode = 0;
while (!wakeup) {
if (timeout < 0) {
errorCode = pthread_cond_wait(&cond, &mutex);
} else {
timespec ti;
qt_abstime_for_timeout(&ti, timeout);
errorCode = pthread_cond_timedwait(&cond, &mutex, &ti);
}
if (errorCode) {
if (errorCode == ETIMEDOUT) {
if (wakeup)
errorCode = 0;
break;
}
report_error(errorCode, "QMutex::lock()", "cv wait");
}
}
bool ret = wakeup;
wakeup = false;
report_error(pthread_mutex_unlock(&mutex), "QMutex::lock", "mutex unlock");
return ret;
}
void QMutexPrivate::wakeUp() Q_DECL_NOTHROW
{
report_error(pthread_mutex_lock(&mutex), "QMutex::unlock", "mutex lock");
wakeup = true;
report_error(pthread_cond_signal(&cond), "QMutex::unlock", "cv signal");
report_error(pthread_mutex_unlock(&mutex), "QMutex::unlock", "mutex unlock");
}
QT_END_NAMESPACE
#endif // QT_NO_THREAD
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