Long live Qt!

1 files changed, 134 insertions, 0 deletions

diff --git a/src/gui/embedded/qwssignalhandler.cpp b/src/gui/embedded/qwssignalhandler.cpp
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+++ b/src/gui/embedded/qwssignalhandler.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@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