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| Source at commit 1322 created 12 years 8 months ago. By meklort, Add doxygen to utils folder | |
|---|---|
| 1 | /****************************************************************************␊ |
| 2 | **␊ |
| 3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).␊ |
| 4 | ** Contact: Nokia Corporation (qt-info@nokia.com)␊ |
| 5 | **␊ |
| 6 | ** This file is part of the QtCore module of the Qt Toolkit.␊ |
| 7 | **␊ |
| 8 | ** $QT_BEGIN_LICENSE:LGPL$␊ |
| 9 | ** No Commercial Usage␊ |
| 10 | ** This file contains pre-release code and may not be distributed.␊ |
| 11 | ** You may use this file in accordance with the terms and conditions␊ |
| 12 | ** contained in the either Technology Preview License Agreement or the␊ |
| 13 | ** Beta Release License Agreement.␊ |
| 14 | **␊ |
| 15 | ** GNU Lesser General Public License Usage␊ |
| 16 | ** Alternatively, this file may be used under the terms of the GNU Lesser␊ |
| 17 | ** General Public License version 2.1 as published by the Free Software␊ |
| 18 | ** Foundation and appearing in the file LICENSE.LGPL included in the␊ |
| 19 | ** packaging of this file. Please review the following information to␊ |
| 20 | ** ensure the GNU Lesser General Public License version 2.1 requirements␊ |
| 21 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.␊ |
| 22 | **␊ |
| 23 | ** In addition, as a special exception, Nokia gives you certain␊ |
| 24 | ** additional rights. These rights are described in the Nokia Qt LGPL␊ |
| 25 | ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this␊ |
| 26 | ** package.␊ |
| 27 | **␊ |
| 28 | ** GNU General Public License Usage␊ |
| 29 | ** Alternatively, this file may be used under the terms of the GNU␊ |
| 30 | ** General Public License version 3.0 as published by the Free Software␊ |
| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the␊ |
| 32 | ** packaging of this file. Please review the following information to␊ |
| 33 | ** ensure the GNU General Public License version 3.0 requirements will be␊ |
| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.␊ |
| 35 | **␊ |
| 36 | ** If you are unsure which license is appropriate for your use, please␊ |
| 37 | ** contact the sales department at http://www.qtsoftware.com/contact.␊ |
| 38 | ** $QT_END_LICENSE$␊ |
| 39 | **␊ |
| 40 | ****************************************************************************/␊ |
| 41 | ␊ |
| 42 | #include <errno.h>␊ |
| 43 | #include <pthread.h>␊ |
| 44 | ␊ |
| 45 | #include "qglobal.h"␊ |
| 46 | #include "qmutex.h"␊ |
| 47 | #include "qmutex_p.h"␊ |
| 48 | ␊ |
| 49 | static pthread_mutex_t qAtomicMutex = PTHREAD_MUTEX_INITIALIZER;␊ |
| 50 | ␊ |
| 51 | static void report_error(int code, const char *where, const char *what)␊ |
| 52 | {␊ |
| 53 | if (code != 0)␊ |
| 54 | qWarning("%s: %s failure: %d", where, what, code);␊ |
| 55 | }␊ |
| 56 | ␊ |
| 57 | ␊ |
| 58 | QMutexPrivate::QMutexPrivate()␊ |
| 59 | : contenders(0), wakeup(FALSE)␊ |
| 60 | {␊ |
| 61 | report_error(pthread_mutex_init(&mutex, NULL), "QMutex", "mutex init");␊ |
| 62 | report_error(pthread_cond_init(&cond, NULL), "QMutex", "cv init");␊ |
| 63 | }␊ |
| 64 | ␊ |
| 65 | QMutexPrivate::~QMutexPrivate()␊ |
| 66 | {␊ |
| 67 | report_error(pthread_cond_destroy(&cond), "QMutex", "cv destroy");␊ |
| 68 | report_error(pthread_mutex_destroy(&mutex), "QMutex", "mutex destroy");␊ |
| 69 | }␊ |
| 70 | ␊ |
| 71 | void QMutexPrivate::wait()␊ |
| 72 | {␊ |
| 73 | report_error(pthread_mutex_lock(&mutex), "QMutex::lock", "mutex lock");␊ |
| 74 | int errorCode = 0;␊ |
| 75 | while (!wakeup)␊ |
| 76 | {␊ |
| 77 | errorCode = pthread_cond_wait(&cond, &mutex);␊ |
| 78 | if (errorCode)␊ |
| 79 | {␊ |
| 80 | report_error(errorCode, "QMutex::lock()", "cv wait");␊ |
| 81 | }␊ |
| 82 | }␊ |
| 83 | wakeup = FALSE;␊ |
| 84 | report_error(pthread_mutex_unlock(&mutex), "QMutex::lock", "mutex unlock");␊ |
| 85 | }␊ |
| 86 | ␊ |
| 87 | void QMutexPrivate::wakeUp()␊ |
| 88 | {␊ |
| 89 | report_error(pthread_mutex_lock(&mutex), "QMutex::unlock", "mutex lock");␊ |
| 90 | wakeup = TRUE;␊ |
| 91 | report_error(pthread_cond_signal(&cond), "QMutex::unlock", "cv signal");␊ |
| 92 | report_error(pthread_mutex_unlock(&mutex), "QMutex::unlock", "mutex unlock");␊ |
| 93 | }␊ |
| 94 | ␊ |
| 95 | bool QAtomicInt::testAndSet(int expectedValue,int newValue)␊ |
| 96 | {␊ |
| 97 | bool returnValue = false;␊ |
| 98 | pthread_mutex_lock(&qAtomicMutex);␊ |
| 99 | if (m_value == expectedValue)␊ |
| 100 | {␊ |
| 101 | m_value = newValue;␊ |
| 102 | returnValue = true;␊ |
| 103 | }␊ |
| 104 | pthread_mutex_unlock(&qAtomicMutex);␊ |
| 105 | return returnValue;␊ |
| 106 | }␊ |
| 107 | ␊ |
| 108 | int QAtomicInt::fetchAndAdd(int valueToAdd)␊ |
| 109 | {␊ |
| 110 | int returnValue;␊ |
| 111 | pthread_mutex_lock(&qAtomicMutex);␊ |
| 112 | returnValue = m_value;␊ |
| 113 | m_value += valueToAdd;␊ |
| 114 | pthread_mutex_unlock(&qAtomicMutex);␊ |
| 115 | return returnValue;␊ |
| 116 | }␊ |
| 117 | ␊ |
| 118 | |
