QWSSignalHandler Class Reference

#include <qwssignalhandler_p.h>

Inheritance diagram for QWSSignalHandler:

Public Functions
void	addLock (QLock *lock)
void	addObject (QObject *object)
void	addWSLock (QWSLock *wslock)
void	removeLock (QLock *lock)
void	removeWSLock (QWSLock *wslock)
	~QWSSignalHandler ()

Static Public Functions
static QWSSignalHandler *	instance ()

Private Functions
void	clear ()
	QWSSignalHandler ()

Static Private Functions
static void	handleSignal (int signal)

Properties
QList< QLock * >	locks
QObjectCleanupHandler	objects
QHash< int, qt_sighandler_t >	oldHandlers
QList< QWSLock * >	wslocks

Friends
class	QWSSignalHandlerPrivate

Detailed Description

Definition at line 73 of file qwssignalhandler_p.h.

Constructors and Destructors

~QWSSignalHandler()

QWSSignalHandler::~QWSSignalHandler

(

)

Definition at line 85 of file qwssignalhandler.cpp.

{
    clear();
}

QWSSignalHandler()

QWSSignalHandler::QWSSignalHandler ( )

private

Definition at line 69 of file qwssignalhandler.cpp.

{
    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);
    }
}

Functions

addLock()

void QWSSignalHandler::addLock ( QLock *  lock )

inline

Definition at line 81 of file qwssignalhandler_p.h.

Referenced by QLock::QLock().

{ locks.append(lock); }

addObject()

void QWSSignalHandler::addObject ( QObject *  object )

inline

Definition at line 86 of file qwssignalhandler_p.h.

Referenced by QAhiScreenPrivate::QAhiScreenPrivate(), QDirectFBScreenPrivate::QDirectFBScreenPrivate(), QLinuxFbScreenPrivate::QLinuxFbScreenPrivate(), QVNCScreenPrivate::QVNCScreenPrivate(), and QWSTtyKbPrivate::QWSTtyKbPrivate().

{ (void)objects.add(object); }

addWSLock()

void QWSSignalHandler::addWSLock ( QWSLock *  wslock )

inline

Definition at line 83 of file qwssignalhandler_p.h.

Referenced by QWSLock::QWSLock().

{ wslocks.append(wslock); }

clear()

void QWSSignalHandler::clear ( )

private

Definition at line 90 of file qwssignalhandler.cpp.

Referenced by handleSignal(), and ~QWSSignalHandler().

{
#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();
}

handleSignal()

void QWSSignalHandler::handleSignal ( int  signal )

staticprivate

Definition at line 104 of file qwssignalhandler.cpp.

Referenced by QWSSignalHandler().

{
    QWSSignalHandler *h = instance();
    if (h) {
        signal(signum, h->oldHandlers[signum]);
        h->clear();
    }
    raise(signum);
}

instance()

QWSSignalHandler * QWSSignalHandler::instance ( )

static

Definition at line 64 of file qwssignalhandler.cpp.

Referenced by handleSignal(), QAhiScreenPrivate::QAhiScreenPrivate(), QDirectFBScreenPrivate::QDirectFBScreenPrivate(), QLinuxFbScreenPrivate::QLinuxFbScreenPrivate(), QLock::QLock(), QVNCScreenPrivate::QVNCScreenPrivate(), QWSLock::QWSLock(), QWSTtyKbPrivate::QWSTtyKbPrivate(), QLock::~QLock(), and QWSLock::~QWSLock().

{
    return signalHandlerInstance();
}

removeLock()

void QWSSignalHandler::removeLock ( QLock *  lock )

inline

Definition at line 82 of file qwssignalhandler_p.h.

Referenced by QLock::~QLock().

{ locks.removeOne(lock); }

removeWSLock()

void QWSSignalHandler::removeWSLock ( QWSLock *  wslock )

inline

Definition at line 84 of file qwssignalhandler_p.h.

Referenced by QWSLock::~QWSLock().

{ wslocks.removeOne(wslock); }

Friends and Related Functions

QWSSignalHandlerPrivate

friend class QWSSignalHandlerPrivate

friend

Definition at line 102 of file qwssignalhandler_p.h.

Properties

locks

QList<QLock *> QWSSignalHandler::locks

private

Definition at line 97 of file qwssignalhandler_p.h.

Referenced by clear().

objects

QObjectCleanupHandler QWSSignalHandler::objects

private

Definition at line 100 of file qwssignalhandler_p.h.

Referenced by clear().

oldHandlers

QHash<int, qt_sighandler_t> QWSSignalHandler::oldHandlers

private

Definition at line 95 of file qwssignalhandler_p.h.

Referenced by handleSignal(), and QWSSignalHandler().

wslocks

QList<QWSLock *> QWSSignalHandler::wslocks

private

Definition at line 98 of file qwssignalhandler_p.h.

Referenced by clear().

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The documentation for this class was generated from the following files:

• /src/gui/embedded/qwssignalhandler_p.h
• /src/gui/embedded/qwssignalhandler.cpp