author | eckhart.koppen@nokia.com |
Wed, 31 Mar 2010 11:06:36 +0300 | |
changeset 7 | f7bc934e204c |
parent 0 | 1918ee327afb |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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f7bc934e204c
5cabc75a39ca2f064f70b40f72ed93c74c4dc19b
eckhart.koppen@nokia.com
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (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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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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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 additional |
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** rights. These rights are described in the Nokia 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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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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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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#if defined(Q_OS_VXWORKS) && defined(wakeup) |
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#undef wakeup |
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#endif |
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QT_BEGIN_NAMESPACE |
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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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QMutexPrivate::QMutexPrivate(QMutex::RecursionMode mode) |
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: recursive(mode == QMutex::Recursive), contenders(0), lastSpinCount(0), owner(0), count(0), wakeup(false) |
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{ |
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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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} |
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QMutexPrivate::~QMutexPrivate() |
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{ |
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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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} |
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bool QMutexPrivate::wait(int timeout) |
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{ |
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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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break; |
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report_error(errorCode, "QMutex::lock()", "cv wait"); |
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} |
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} |
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wakeup = false; |
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report_error(pthread_mutex_unlock(&mutex), "QMutex::lock", "mutex unlock"); |
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return errorCode == 0; |
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} |
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void QMutexPrivate::wakeUp() |
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{ |
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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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} |
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QT_END_NAMESPACE |
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#endif // QT_NO_THREAD |