Add glib main loop support patches

1 files changed, 593 insertions, 0 deletions

diff --git a/src/kernel/qeventloop_unix_glib.cpp b/src/kernel/qeventloop_unix_glib.cpp
new file mode 100644
index 0000000..6852f6b
--- /dev/null
+++ b/src/kernel/qeventloop_unix_glib.cpp
@@ -0,0 +1,593 @@
+/**
+** Qt->glib main event loop integration by Norbert Frese 2005
+** code based on qeventloop_unix.cpp 3.3.5
+**
+*/
+
+/****************************************************************************
+** $Id: qt/qeventloop_unix_glib.cpp  
+**
+** Implementation of QEventLoop class
+**
+** Copyright (C) 2000-2005 Trolltech AS.  All rights reserved.
+**
+** This file is part of the kernel module of the Qt GUI Toolkit.
+**
+** This file may be distributed under the terms of the Q Public License
+** as defined by Trolltech AS of Norway and appearing in the file
+** LICENSE.QPL included in the packaging of this file.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
+** licenses for Unix/X11 or for Qt/Embedded may use this file in accordance
+** with the Qt Commercial License Agreement provided with the Software.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/pricing.html or email [email protected] for
+**   information about Qt Commercial License Agreements.
+** See http://www.trolltech.com/qpl/ for QPL licensing information.
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact [email protected] if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+
+#include "qeventloop_glib_p.h" // includes qplatformdefs.h
+#include "qeventloop.h"
+#include "qapplication.h"
+#include "qbitarray.h"
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include <glib.h>
+
+/*****************************************************************************
+  Timer handling; UNIX has no application timer support so we'll have to
+  make our own from scratch.
+
+  NOTE: These functions are for internal use. QObject::startTimer() and
+	QObject::killTimer() are for public use.
+	The QTimer class provides a high-level interface which translates
+	timer events into signals.
+
+  qStartTimer( interval, obj )
+	Starts a timer which will run until it is killed with qKillTimer()
+	Arguments:
+	    int interval	timer interval in milliseconds
+	    QObject *obj	where to send the timer event
+	Returns:
+	    int			timer identifier, or zero if not successful
+
+  qKillTimer( timerId )
+	Stops a timer specified by a timer identifier.
+	Arguments:
+	    int timerId		timer identifier
+	Returns:
+	    bool		TRUE if successful
+
+  qKillTimer( obj )
+	Stops all timers that are sent to the specified object.
+	Arguments:
+	    QObject *obj	object receiving timer events
+	Returns:
+	    bool		TRUE if successful
+ *****************************************************************************/
+
+//
+// Internal data structure for timers
+//
+
+struct TimerInfo {				// internal timer info
+    int	     id;				// - timer identifier
+    timeval  interval;				// - timer interval
+    timeval  timeout;				// - when to sent event
+    QObject *obj;				// - object to receive event
+};
+
+typedef QPtrList<TimerInfo> TimerList;	// list of TimerInfo structs
+
+static QBitArray *timerBitVec;			// timer bit vector
+static TimerList *timerList	= 0;		// timer list
+
+static void	initTimers();
+void cleanupTimers();
+static timeval	watchtime;			// watch if time is turned back
+timeval		*qt_wait_timer();
+timeval	*qt_wait_timer_max = 0;
+
+//
+// Internal operator functions for timevals
+//
+
+static inline bool operator<( const timeval &t1, const timeval &t2 )
+{
+    return t1.tv_sec < t2.tv_sec ||
+	  (t1.tv_sec == t2.tv_sec && t1.tv_usec < t2.tv_usec);
+}
+
+static inline bool operator==( const timeval &t1, const timeval &t2 )
+{
+    return t1.tv_sec == t2.tv_sec && t1.tv_usec == t2.tv_usec;
+}
+
+static inline timeval &operator+=( timeval &t1, const timeval &t2 )
+{
+    t1.tv_sec += t2.tv_sec;
+    if ( (t1.tv_usec += t2.tv_usec) >= 1000000 ) {
+	t1.tv_sec++;
+	t1.tv_usec -= 1000000;
+    }
+    return t1;
+}
+
+static inline timeval operator+( const timeval &t1, const timeval &t2 )
+{
+    timeval tmp;
+    tmp.tv_sec = t1.tv_sec + t2.tv_sec;
+    if ( (tmp.tv_usec = t1.tv_usec + t2.tv_usec) >= 1000000 ) {
+	tmp.tv_sec++;
+	tmp.tv_usec -= 1000000;
+    }
+    return tmp;
+}
+
+static inline timeval operator-( const timeval &t1, const timeval &t2 )
+{
+    timeval tmp;
+    tmp.tv_sec = t1.tv_sec - t2.tv_sec;
+    if ( (tmp.tv_usec = t1.tv_usec - t2.tv_usec) < 0 ) {
+	tmp.tv_sec--;
+	tmp.tv_usec += 1000000;
+    }
+    return tmp;
+}
+
+
+//
+// Internal functions for manipulating timer data structures.
+// The timerBitVec array is used for keeping track of timer identifiers.
+//
+
+static int allocTimerId()			// find avail timer identifier
+{
+    int i = timerBitVec->size()-1;
+    while ( i >= 0 && (*timerBitVec)[i] )
+	i--;
+    if ( i < 0 ) {
+	i = timerBitVec->size();
+	timerBitVec->resize( 4 * i );
+	for( int j=timerBitVec->size()-1; j > i; j-- )
+	    timerBitVec->clearBit( j );
+    }
+    timerBitVec->setBit( i );
+    return i+1;
+}
+
+static void insertTimer( const TimerInfo *ti )	// insert timer info into list
+{
+    TimerInfo *t = timerList->first();
+    int index = 0;
+#if defined(QT_DEBUG)
+    int dangerCount = 0;
+#endif
+    while ( t && t->timeout < ti->timeout ) {	// list is sorted by timeout
+#if defined(QT_DEBUG)
+	if ( t->obj == ti->obj )
+	    dangerCount++;
+#endif
+	t = timerList->next();
+	index++;
+    }
+    timerList->insert( index, ti );		// inserts sorted
+#if defined(QT_DEBUG)
+    if ( dangerCount > 16 )
+	qDebug( "QObject: %d timers now exist for object %s::%s",
+	       dangerCount, ti->obj->className(), ti->obj->name() );
+#endif
+}
+
+static inline void getTime( timeval &t )	// get time of day
+{
+    gettimeofday( &t, 0 );
+    while ( t.tv_usec >= 1000000 ) {		// NTP-related fix
+	t.tv_usec -= 1000000;
+	t.tv_sec++;
+    }
+    while ( t.tv_usec < 0 ) {
+	if ( t.tv_sec > 0 ) {
+	    t.tv_usec += 1000000;
+	    t.tv_sec--;
+	} else {
+	    t.tv_usec = 0;
+	    break;
+	}
+    }
+}
+
+static void repairTimer( const timeval &time )	// repair broken timer
+{
+    timeval diff = watchtime - time;
+    register TimerInfo *t = timerList->first();
+    while ( t ) {				// repair all timers
+	t->timeout = t->timeout - diff;
+	t = timerList->next();
+    }
+}
+
+//
+// Timer activation functions (called from the event loop)
+//
+
+/*
+  Returns the time to wait for the next timer, or null if no timers are
+  waiting.
+
+  The result is bounded to qt_wait_timer_max if this exists.
+*/
+
+timeval *qt_wait_timer()
+{
+    static timeval tm;
+    bool first = TRUE;
+    timeval currentTime;
+    if ( timerList && timerList->count() ) {	// there are waiting timers
+	getTime( currentTime );
+	if ( first ) {
+	    if ( currentTime < watchtime )	// clock was turned back
+		repairTimer( currentTime );
+	    first = FALSE;
+	    watchtime = currentTime;
+	}
+	TimerInfo *t = timerList->first();	// first waiting timer
+	if ( currentTime < t->timeout ) {	// time to wait
+	    tm = t->timeout - currentTime;
+	} else {
+	    tm.tv_sec  = 0;			// no time to wait
+	    tm.tv_usec = 0;
+	}
+	if ( qt_wait_timer_max && *qt_wait_timer_max < tm )
+	    tm = *qt_wait_timer_max;
+	return &tm;
+    }
+    if ( qt_wait_timer_max ) {
+	tm = *qt_wait_timer_max;
+	return &tm;
+    }
+    return 0;					// no timers
+}
+
+// Timer initialization
+static void initTimers()			// initialize timers
+{
+    timerBitVec = new QBitArray( 128 );
+    Q_CHECK_PTR( timerBitVec );
+    int i = timerBitVec->size();
+    while( i-- > 0 )
+	    timerBitVec->clearBit( i );
+    timerList = new TimerList;
+    Q_CHECK_PTR( timerList );
+    timerList->setAutoDelete( TRUE );
+    gettimeofday( &watchtime, 0 );
+}
+
+// Timer cleanup
+void cleanupTimers()
+{
+    delete timerList;
+    timerList = 0;
+    delete timerBitVec;
+    timerBitVec = 0;
+}
+
+// Main timer functions for starting and killing timers
+int qStartTimer( int interval, QObject *obj )
+{
+    if ( !timerList )				// initialize timer data
+	initTimers();
+    int id = allocTimerId();			// get free timer id
+    if ( id <= 0 ||
+	 id > (int)timerBitVec->size() || !obj )// cannot create timer
+	return 0;
+    timerBitVec->setBit( id-1 );		// set timer active
+    TimerInfo *t = new TimerInfo;		// create timer
+    Q_CHECK_PTR( t );
+    t->id = id;
+    t->interval.tv_sec  = interval/1000;
+    t->interval.tv_usec = (interval%1000)*1000;
+    timeval currentTime;
+    getTime( currentTime );
+    t->timeout = currentTime + t->interval;
+    t->obj = obj;
+    insertTimer( t );				// put timer in list
+    return id;
+}
+
+bool qKillTimer( int id )
+{
+    register TimerInfo *t;
+    if ( !timerList || id <= 0 ||
+	 id > (int)timerBitVec->size() || !timerBitVec->testBit( id-1 ) )
+	return FALSE;				// not init'd or invalid timer
+    t = timerList->first();
+    while ( t && t->id != id )			// find timer info in list
+	t = timerList->next();
+    if ( t ) {					// id found
+	timerBitVec->clearBit( id-1 );		// set timer inactive
+	return timerList->remove();
+    }
+    else					// id not found
+	return FALSE;
+}
+
+bool qKillTimer( QObject *obj )
+{
+    register TimerInfo *t;
+    if ( !timerList )				// not initialized
+	return FALSE;
+    t = timerList->first();
+    while ( t ) {				// check all timers
+	if ( t->obj == obj ) {			// object found
+	    timerBitVec->clearBit( t->id-1 );
+	    timerList->remove();
+	    t = timerList->current();
+	} else {
+	    t = timerList->next();
+	}
+    }
+    return TRUE;
+}
+
+
+
+
+/*****************************************************************************
+ QEventLoop implementations for Glib-Main-Loop
+ *****************************************************************************/
+ 
+ 
+ 
+ 
+void QEventLoop::registerSocketNotifier( QSocketNotifier *notifier )
+{
+	
+	
+	
+    int sockfd = notifier->socket();
+    int type = notifier->type();
+    if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 ) {
+#if defined(QT_CHECK_RANGE)
+         qWarning( "QSocketNotifier: Internal error" );
+#endif
+         return;
+    }
+
+	#ifdef DEBUG_QT_GLIBMAINLOOP
+		printf("register socket notifier %d\n", sockfd);
+	#endif
+	
+    QPtrList<QSockNotGPollFD>  *list = &d->sn_list;
+    QSockNotGPollFD *sn;
+
+	/*
+    if ( ! list ) {
+        // create new list, the QSockNotType destructor will delete it for us
+		list = new QPtrList<QSockNot>;
+		Q_CHECK_PTR( list );
+		list->setAutoDelete( TRUE );
+		d->sn_list = list;
+    }
+	*/
+	
+	gushort events=0;
+	switch (type) {
+		case 0: 
+			events = G_IO_IN | G_IO_HUP;
+			break;
+		case 1:
+			events = G_IO_OUT;
+			break;
+		case 2:
+			events = G_IO_PRI | G_IO_ERR | G_IO_NVAL;
+			break;
+	}
+	
+    sn = new QSockNotGPollFD;
+    Q_CHECK_PTR( sn );
+    sn->obj = notifier;
+    sn->gPollFD.fd = sockfd;
+	sn->gPollFD.events = events; 
+	sn->events = events; // save events!
+	sn->pending = FALSE;
+	
+	list->append( sn );
+	
+	g_source_add_poll(d->gSource, &sn->gPollFD); 
+	
+}
+
+void QEventLoop::unregisterSocketNotifier( QSocketNotifier *notifier )
+{
+    int sockfd = notifier->socket();
+    int type = notifier->type();
+    if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 ) {
+#if defined(QT_CHECK_RANGE)
+         qWarning( "QSocketNotifier: Internal error" );
+#endif
+         return;
+    }
+	
+	#ifdef DEBUG_QT_GLIBMAINLOOP 
+		printf("unregister socket notifier %d\n", sockfd);
+	#endif	
+
+    QPtrList<QSockNotGPollFD> *list = &d->sn_list;
+    QSockNotGPollFD *sn;
+    if ( ! list )
+         return;
+    sn = list->first();
+    while ( sn && !(sn->obj == notifier) )
+        sn = list->next();
+    if ( !sn ) // not found
+        return;
+
+	d->sn_pending_list.removeRef( sn );	
+    list->remove();				// remove notifier found above
+	g_source_remove_poll(d->gSource, &sn->gPollFD);
+	
+	delete sn;  // we don't autodelete - lets do it manually
+	
+}
+
+void QEventLoop::setSocketNotifierPending( QSocketNotifier *notifier )
+{
+    int sockfd = notifier->socket();
+    int type = notifier->type();
+    if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 ) {
+#if defined(QT_CHECK_RANGE)
+	qWarning( "QSocketNotifier: Internal error" );
+#endif
+	return;
+    }
+	
+	#ifdef DEBUG_QT_GLIBMAINLOOP 
+		printf("set socket notifier pending %d\n", sockfd);
+	#endif	
+
+    QPtrList<QSockNotGPollFD> *list = &d->sn_list;
+    QSockNotGPollFD *sn;
+    if ( ! list )
+        return;
+    sn = list->first();
+    while ( sn && !(sn->obj == notifier) )
+        sn = list->next();
+    if ( ! sn ) { // not found
+        return;
+    }
+
+    // We choose a random activation order to be more fair under high load.
+    // If a constant order is used and a peer early in the list can
+    // saturate the IO, it might grab our attention completely.
+    // Also, if we're using a straight list, the callback routines may
+    // delete other entries from the list before those other entries are
+    // processed.
+    if ( !sn->pending ) {
+         d->sn_pending_list.insert( (rand() & 0xff) %
+                 (d->sn_pending_list.count()+1), sn );
+	     sn->pending = TRUE;  // add it only once!
+    }
+}
+
+void QEventLoop::wakeUp()
+{
+    /*
+      Apparently, there is not consistency among different operating
+      systems on how to use FIONREAD.
+
+      FreeBSD, Linux and Solaris all expect the 3rd argument to
+      ioctl() to be an int, which is normally 32-bit even on 64-bit
+      machines.
+
+      IRIX, on the other hand, expects a size_t, which is 64-bit on
+      64-bit machines.
+
+      So, the solution is to use size_t initialized to zero to make
+      sure all bits are set to zero, preventing underflow with the
+      FreeBSD/Linux/Solaris ioctls.
+    */
+    size_t nbytes = 0;
+    char c = 0;
+    if ( ::ioctl( d->thread_pipe[0], FIONREAD, (char*)&nbytes ) >= 0 && nbytes == 0 ) {
+	::write(  d->thread_pipe[1], &c, 1  );
+    }
+}
+
+int QEventLoop::timeToWait() const
+{
+    timeval *tm = qt_wait_timer();
+    if ( ! tm )	// no active timers
+	return -1;
+    return (tm->tv_sec*1000) + (tm->tv_usec/1000);
+}
+
+int QEventLoop::activateTimers()
+{
+    if ( !timerList || !timerList->count() )	// no timers
+	return 0;
+    bool first = TRUE;
+    timeval currentTime;
+    int n_act = 0, maxCount = timerList->count();
+    TimerInfo *begin = 0;
+    register TimerInfo *t;
+
+    for ( ;; ) {
+	if ( ! maxCount-- )
+	    break;
+	getTime( currentTime );			// get current time
+	if ( first ) {
+	    if ( currentTime < watchtime )	// clock was turned back
+		repairTimer( currentTime );
+	    first = FALSE;
+	    watchtime = currentTime;
+	}
+	t = timerList->first();
+	if ( !t || currentTime < t->timeout )	// no timer has expired
+	    break;
+	if ( ! begin ) {
+	    begin = t;
+	} else if ( begin == t ) {
+	    // avoid sending the same timer multiple times
+	    break;
+	} else if ( t->interval <  begin->interval || t->interval == begin->interval ) {
+	    begin = t;
+	}
+	timerList->take();			// unlink from list
+	t->timeout += t->interval;
+	if ( t->timeout < currentTime )
+	    t->timeout = currentTime + t->interval;
+	insertTimer( t );			// relink timer
+	if ( t->interval.tv_usec > 0 || t->interval.tv_sec > 0 )
+	    n_act++;
+	QTimerEvent e( t->id );
+	QApplication::sendEvent( t->obj, &e );	// send event
+	if ( timerList->findRef( begin ) == -1 )
+	    begin = 0;
+    }
+    return n_act;
+}
+
+int QEventLoop::activateSocketNotifiers()
+{
+    if ( d->sn_pending_list.isEmpty() )
+	    return 0;
+
+    // activate entries
+    int n_act = 0;
+    QEvent event( QEvent::SockAct );
+    QPtrListIterator<QSockNotGPollFD> it( d->sn_pending_list );
+    QSockNotGPollFD *sn;
+    while ( (sn=it.current()) ) {
+        ++it;
+        d->sn_pending_list.removeRef( sn );
+        if ( sn->pending ) {
+			
+			#ifdef DEBUG_QT_GLIBMAINLOOP 
+				printf("activate sn  : send event fd=%d\n", sn->gPollFD.fd );
+			#endif	
+			
+			
+            sn->pending = FALSE;
+            QApplication::sendEvent( sn->obj, &event );
+            n_act++;
+	    }
+    }
+
+    return n_act;
+}