/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
** All rights reserved. | |
** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtCore module of the Qt Toolkit. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** 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 1.1, 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. | |
** | |
** Other Usage | |
** Alternatively, this file may be used in accordance with the terms and | |
** conditions contained in a signed written agreement between you and Nokia. | |
** | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
#include <QtCore/qglobal.h> | |
#include <unistd.h> | |
#ifdef _POSIX_PRIORITY_SCHEDULING | |
# include <sched.h> | |
#endif | |
#include <time.h> | |
QT_BEGIN_NAMESPACE | |
QT_USE_NAMESPACE | |
Q_CORE_EXPORT volatile char qt_atomic_lock = 0; | |
Q_CORE_EXPORT void qt_atomic_yield(int *count) | |
{ | |
#ifdef _POSIX_PRIORITY_SCHEDULING | |
if((*count)++ < 50) { | |
sched_yield(); | |
} else | |
#endif | |
{ | |
struct timespec tm; | |
tm.tv_sec = 0; | |
tm.tv_nsec = 2000001; | |
nanosleep(&tm, NULL); | |
*count = 0; | |
} | |
} | |
QT_END_NAMESPACE |