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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwssignalhandler_p.h"
#ifndef QT_NO_QWS_SIGNALHANDLER
#include "qlock_p.h"
#include "qwslock_p.h"
#include <sys/types.h>
#include <signal.h>
QT_BEGIN_NAMESPACE
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()
{
clear();
}
void QWSSignalHandler::clear()
{
#if !defined(QT_NO_QWS_MULTIPROCESS)
// it is safe to call d-tors directly here since, on normal exit,
// lists should be empty; otherwise, we don't care about semi-alive objects
// and the only important thing here is to unregister the system semaphores.
while (!locks.isEmpty())
locks.takeLast()->~QLock();
while (!wslocks.isEmpty())
wslocks.takeLast()->~QWSLock();
#endif
objects.clear();
}
void QWSSignalHandler::handleSignal(int signum)
{
QWSSignalHandler *h = instance();
if (h) {
signal(signum, h->oldHandlers[signum]);
h->clear();
}
raise(signum);
}
QT_END_NAMESPACE
#endif // QT_NO_QWS_SIGNALHANDLER
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