117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qwssignalhandler_p.h"
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#ifndef QT_NO_QWS_SIGNALHANDLER
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#include "qlock_p.h"
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#include "qwslock_p.h"
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#include <sys/types.h>
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#include <signal.h>
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QT_BEGIN_NAMESPACE
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class QWSSignalHandlerPrivate : public QWSSignalHandler
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{
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public:
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QWSSignalHandlerPrivate() : QWSSignalHandler() {}
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};
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Q_GLOBAL_STATIC(QWSSignalHandlerPrivate, signalHandlerInstance);
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QWSSignalHandler* QWSSignalHandler::instance()
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{
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return signalHandlerInstance();
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}
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QWSSignalHandler::QWSSignalHandler()
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{
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const int signums[] = { SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE,
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SIGSEGV, SIGTERM, SIGBUS };
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const int n = sizeof(signums)/sizeof(int);
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for (int i = 0; i < n; ++i) {
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const int signum = signums[i];
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qt_sighandler_t old = signal(signum, handleSignal);
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if (old == SIG_IGN) // don't remove shm and semaphores when ignored
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signal(signum, old);
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else
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oldHandlers[signum] = (old == SIG_ERR ? SIG_DFL : old);
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}
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}
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QWSSignalHandler::~QWSSignalHandler()
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{
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clear();
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}
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void QWSSignalHandler::clear()
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{
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#if !defined(QT_NO_QWS_MULTIPROCESS)
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// it is safe to call d-tors directly here since, on normal exit,
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// lists should be empty; otherwise, we don't care about semi-alive objects
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// and the only important thing here is to unregister the system semaphores.
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while (!locks.isEmpty())
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locks.takeLast()->~QLock();
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while (!wslocks.isEmpty())
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wslocks.takeLast()->~QWSLock();
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#endif
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objects.clear();
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}
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void QWSSignalHandler::handleSignal(int signum)
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{
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QWSSignalHandler *h = instance();
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if (h) {
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signal(signum, h->oldHandlers[signum]);
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h->clear();
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}
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raise(signum);
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}
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QT_END_NAMESPACE
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#endif // QT_NO_QWS_SIGNALHANDLER
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