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| Source at commit 1406 created 12 years 10 months ago. By meklort, Revert drivers.c so that kexts are only loaded when OSBundleRequired is set and that value is not safe mode. Added some comments about it too. | |
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| 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 "qwaitcondition.h"␊ |
| 43 | #include "qmutex.h"␊ |
| 44 | #include <pthread.h>␊ |
| 45 | ␊ |
| 46 | #define MIN(a,b) ((a)<(b)?(a):(b))␊ |
| 47 | ␊ |
| 48 | static void report_error(int code, const char *where, const char *what)␊ |
| 49 | {␊ |
| 50 | if (code != 0)␊ |
| 51 | qWarning("%s: %s failure: %d", where, what, code);␊ |
| 52 | }␊ |
| 53 | ␊ |
| 54 | struct QWaitConditionPrivate␊ |
| 55 | {␊ |
| 56 | pthread_mutex_t mutex;␊ |
| 57 | pthread_cond_t cond;␊ |
| 58 | int waiters;␊ |
| 59 | int wakeups;␊ |
| 60 | ␊ |
| 61 | void wait()␊ |
| 62 | {␊ |
| 63 | int code;␊ |
| 64 | for (;;)␊ |
| 65 | {␊ |
| 66 | code = pthread_cond_wait(&cond, &mutex);␊ |
| 67 | if (code == 0 && wakeups == 0) ␊ |
| 68 | {␊ |
| 69 | // many vendors warn of spurios wakeups from␊ |
| 70 | // pthread_cond_wait(), especially after signal delivery,␊ |
| 71 | // even though POSIX doesn't allow for it... sigh␊ |
| 72 | continue;␊ |
| 73 | }␊ |
| 74 | break;␊ |
| 75 | }␊ |
| 76 | ␊ |
| 77 | --waiters;␊ |
| 78 | if (code == 0)␊ |
| 79 | {␊ |
| 80 | --wakeups;␊ |
| 81 | }␊ |
| 82 | else␊ |
| 83 | {␊ |
| 84 | report_error(code, "QWaitCondition::wait()", "cv wait");␊ |
| 85 | }␊ |
| 86 | report_error(pthread_mutex_unlock(&mutex), "QWaitCondition::wait()", "mutex unlock");␊ |
| 87 | }␊ |
| 88 | };␊ |
| 89 | ␊ |
| 90 | ␊ |
| 91 | QWaitCondition::QWaitCondition()␊ |
| 92 | {␊ |
| 93 | d = new QWaitConditionPrivate;␊ |
| 94 | report_error(pthread_mutex_init(&d->mutex, NULL), "QWaitCondition", "mutex init");␊ |
| 95 | report_error(pthread_cond_init(&d->cond, NULL), "QWaitCondition", "cv init");␊ |
| 96 | d->waiters = d->wakeups = 0;␊ |
| 97 | }␊ |
| 98 | ␊ |
| 99 | ␊ |
| 100 | QWaitCondition::~QWaitCondition()␊ |
| 101 | {␊ |
| 102 | report_error(pthread_cond_destroy(&d->cond), "QWaitCondition", "cv destroy");␊ |
| 103 | report_error(pthread_mutex_destroy(&d->mutex), "QWaitCondition", "mutex destroy");␊ |
| 104 | delete d;␊ |
| 105 | }␊ |
| 106 | ␊ |
| 107 | void QWaitCondition::wakeOne()␊ |
| 108 | {␊ |
| 109 | report_error(pthread_mutex_lock(&d->mutex), "QWaitCondition::wakeOne()", "mutex lock");␊ |
| 110 | d->wakeups = MIN(d->wakeups + 1, d->waiters);␊ |
| 111 | report_error(pthread_cond_signal(&d->cond), "QWaitCondition::wakeOne()", "cv signal");␊ |
| 112 | report_error(pthread_mutex_unlock(&d->mutex), "QWaitCondition::wakeOne()", "mutex unlock");␊ |
| 113 | }␊ |
| 114 | ␊ |
| 115 | void QWaitCondition::wakeAll()␊ |
| 116 | {␊ |
| 117 | report_error(pthread_mutex_lock(&d->mutex), "QWaitCondition::wakeAll()", "mutex lock");␊ |
| 118 | d->wakeups = d->waiters;␊ |
| 119 | report_error(pthread_cond_broadcast(&d->cond), "QWaitCondition::wakeAll()", "cv broadcast");␊ |
| 120 | report_error(pthread_mutex_unlock(&d->mutex), "QWaitCondition::wakeAll()", "mutex unlock");␊ |
| 121 | }␊ |
| 122 | ␊ |
| 123 | void QWaitCondition::wait(QMutex *mutex)␊ |
| 124 | {␊ |
| 125 | if (!mutex) return;␊ |
| 126 | ␊ |
| 127 | report_error(pthread_mutex_lock(&d->mutex), "QWaitCondition::wait()", "mutex lock");␊ |
| 128 | ++d->waiters;␊ |
| 129 | mutex->unlock();␊ |
| 130 | d->wait();␊ |
| 131 | mutex->lock();␊ |
| 132 | }␊ |
| 133 | ␊ |
| 134 | |
