| /**************************************************************************** |
| ** |
| ** 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 QtGui 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. |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qwssignalhandler_p.h" |
| |
| #ifndef QT_NO_QWS_SIGNALHANDLER |
| |
| #include <sys/types.h> |
| #ifndef QT_NO_QWS_MULTIPROCESS |
| # include <sys/ipc.h> |
| # include <sys/sem.h> |
| #endif |
| #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 |