151 lines
4.6 KiB
C++
151 lines
4.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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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 License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the 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 Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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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, Digia gives you certain additional
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** rights. These rights are described in the Digia 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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** 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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**
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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 "qatomic.h"
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#include "qmutex_p.h"
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#include <errno.h>
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#ifndef Q_OS_GENODE
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#if defined(Q_OS_VXWORKS) && defined(wakeup)
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#undef wakeup
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#endif
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#endif /* Q_OS_GENODE */
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QT_BEGIN_NAMESPACE
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#ifndef Q_OS_GENODE
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static void report_error(int code, const char *where, const char *what)
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{
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if (code != 0)
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qWarning("%s: %s failure: %s", where, what, qPrintable(qt_error_string(code)));
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}
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#endif /* Q_OS_GENODE */
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QMutexPrivate::QMutexPrivate()
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#ifndef Q_OS_GENODE
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: wakeup(false)
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#endif /* Q_OS_GENODE */
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{
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#ifndef Q_OS_GENODE
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report_error(pthread_mutex_init(&mutex, NULL), "QMutex", "mutex init");
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report_error(pthread_cond_init(&cond, NULL), "QMutex", "cv init");
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#endif /* Q_OS_GENODE */
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}
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QMutexPrivate::~QMutexPrivate()
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{
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#ifndef Q_OS_GENODE
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report_error(pthread_cond_destroy(&cond), "QMutex", "cv destroy");
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report_error(pthread_mutex_destroy(&mutex), "QMutex", "mutex destroy");
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#endif /* Q_OS_GENODE */
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}
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bool QMutexPrivate::wait(int timeout)
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{
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#ifdef Q_OS_GENODE
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bool ret;
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if (timeout == 0) {
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ret = false; /* timed out */
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} else if (timeout < 0) {
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sem.down();
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ret = true; /* woken up */
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} else {
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try {
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sem.down(timeout);
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ret = true;
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} catch(Genode::Timeout_exception) {
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ret = false;
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}
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}
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#else
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report_error(pthread_mutex_lock(&mutex), "QMutex::lock", "mutex lock");
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int errorCode = 0;
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while (!wakeup) {
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if (timeout < 0) {
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errorCode = pthread_cond_wait(&cond, &mutex);
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} else {
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struct timeval tv;
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gettimeofday(&tv, 0);
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timespec ti;
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ti.tv_nsec = (tv.tv_usec + (timeout % 1000) * 1000) * 1000;
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ti.tv_sec = tv.tv_sec + (timeout / 1000) + (ti.tv_nsec / 1000000000);
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ti.tv_nsec %= 1000000000;
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errorCode = pthread_cond_timedwait(&cond, &mutex, &ti);
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}
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if (errorCode) {
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if (errorCode == ETIMEDOUT) {
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if (wakeup)
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errorCode = 0;
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break;
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}
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report_error(errorCode, "QMutex::lock()", "cv wait");
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}
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}
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bool ret = wakeup;
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wakeup = false;
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report_error(pthread_mutex_unlock(&mutex), "QMutex::lock", "mutex unlock");
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#endif /* Q_OS_GENODE */
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return ret;
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}
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void QMutexPrivate::wakeUp() Q_DECL_NOTHROW
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{
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#ifdef Q_OS_GENODE
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sem.up();
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#else
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report_error(pthread_mutex_lock(&mutex), "QMutex::unlock", "mutex lock");
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wakeup = true;
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report_error(pthread_cond_signal(&cond), "QMutex::unlock", "cv signal");
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report_error(pthread_mutex_unlock(&mutex), "QMutex::unlock", "mutex unlock");
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#endif /* Q_OS_GENODE */
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}
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QT_END_NAMESPACE
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#endif // QT_NO_THREAD
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