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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwssignalhandler_p.h"
#ifndef QT_NO_QWS_SIGNALHANDLER
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <signal.h>
QT_BEGIN_NAMESPACE
#ifndef Q_OS_BSD4
union semun {
int val;
struct semid_ds *buf;
unsigned short *array;
struct seminfo *__buf;
};
#endif
class QWSSignalHandlerPrivate : public QWSSignalHandler
{
public:
QWSSignalHandlerPrivate() : QWSSignalHandler() {}
};
Q_GLOBAL_STATIC(QWSSignalHandlerPrivate, signalHandlerInstance);
QWSSignalHandler* QWSSignalHandler::instance()
{
return signalHandlerInstance();
}
QWSSignalHandler::QWSSignalHandler()
{
const int signums[] = { SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE,
SIGSEGV, SIGTERM, SIGBUS };
const int n = sizeof(signums)/sizeof(int);
for (int i = 0; i < n; ++i) {
const int signum = signums[i];
qt_sighandler_t old = signal(signum, handleSignal);
if (old == SIG_IGN) // don't remove shm and semaphores when ignored
signal(signum, old);
else
oldHandlers[signum] = (old == SIG_ERR ? SIG_DFL : old);
}
}
QWSSignalHandler::~QWSSignalHandler()
{
#ifndef QT_NO_QWS_MULTIPROCESS
while (!semaphores.isEmpty())
removeSemaphore(semaphores.last());
#endif
}
#ifndef QT_NO_QWS_MULTIPROCESS
void QWSSignalHandler::removeSemaphore(int semno)
{
const int index = semaphores.lastIndexOf(semno);
if (index != -1) {
semun semval;
semval.val = 0;
semctl(semaphores.at(index), 0, IPC_RMID, semval);
semaphores.remove(index);
}
}
#endif // QT_NO_QWS_MULTIPROCESS
void QWSSignalHandler::handleSignal(int signum)
{
QWSSignalHandler *h = instance();
signal(signum, h->oldHandlers[signum]);
#ifndef QT_NO_QWS_MULTIPROCESS
semun semval;
semval.val = 0;
for (int i = 0; i < h->semaphores.size(); ++i)
semctl(h->semaphores.at(i), 0, IPC_RMID, semval);
#endif
h->objects.clear();
raise(signum);
}
QT_END_NAMESPACE
#endif // QT_QWS_NO_SIGNALHANDLER
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