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Diffstat (limited to 'qtools/qmutex_unix.cpp')
| -rw-r--r-- | qtools/qmutex_unix.cpp | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/qtools/qmutex_unix.cpp b/qtools/qmutex_unix.cpp new file mode 100644 index 0000000..4fe9a58 --- /dev/null +++ b/qtools/qmutex_unix.cpp @@ -0,0 +1,117 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <errno.h> +#include <pthread.h> + +#include "qglobal.h" +#include "qmutex.h" +#include "qmutex_p.h" + +static pthread_mutex_t qAtomicMutex = PTHREAD_MUTEX_INITIALIZER; + +static void report_error(int code, const char *where, const char *what) +{ + if (code != 0) + qWarning("%s: %s failure: %d", where, what, code); +} + + +QMutexPrivate::QMutexPrivate() + : contenders(0), wakeup(FALSE) +{ + report_error(pthread_mutex_init(&mutex, NULL), "QMutex", "mutex init"); + report_error(pthread_cond_init(&cond, NULL), "QMutex", "cv init"); +} + +QMutexPrivate::~QMutexPrivate() +{ + report_error(pthread_cond_destroy(&cond), "QMutex", "cv destroy"); + report_error(pthread_mutex_destroy(&mutex), "QMutex", "mutex destroy"); +} + +void QMutexPrivate::wait() +{ + report_error(pthread_mutex_lock(&mutex), "QMutex::lock", "mutex lock"); + int errorCode = 0; + while (!wakeup) + { + errorCode = pthread_cond_wait(&cond, &mutex); + if (errorCode) + { + report_error(errorCode, "QMutex::lock()", "cv wait"); + } + } + wakeup = FALSE; + report_error(pthread_mutex_unlock(&mutex), "QMutex::lock", "mutex unlock"); +} + +void QMutexPrivate::wakeUp() +{ + 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"); +} + +bool QAtomicInt::testAndSet(int expectedValue,int newValue) +{ + bool returnValue = false; + pthread_mutex_lock(&qAtomicMutex); + if (m_value == expectedValue) + { + m_value = newValue; + returnValue = true; + } + pthread_mutex_unlock(&qAtomicMutex); + return returnValue; +} + +int QAtomicInt::fetchAndAdd(int valueToAdd) +{ + int returnValue; + pthread_mutex_lock(&qAtomicMutex); + returnValue = m_value; + m_value += valueToAdd; + pthread_mutex_unlock(&qAtomicMutex); + return returnValue; +} + |