/** ** TQt->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 TQEventLoop class ** ** Copyright (C) 2000-2005 Trolltech AS. All rights reserved. ** ** This file is part of the kernel module of the TQt 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.TQPL 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 TQt Enterprise Edition or TQt Professional Edition ** licenses for Unix/X11 or for TQt/Embedded may use this file in accordance ** with the TQt 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 sales@trolltech.com for ** information about TQt Commercial License Agreements. ** See http://www.trolltech.com/qpl/ for TQPL licensing information. ** See http://www.trolltech.com/gpl/ for GPL licensing information. ** ** Contact info@trolltech.com if any conditions of this licensing are ** not clear to you. ** **********************************************************************/ #include "qeventloop_glib_p.h" // includes qplatformdefs.h #include "ntqeventloop.h" #include "ntqapplication.h" #include "ntqbitarray.h" #include "ntqmutex.h" #if defined(QT_THREAD_SUPPORT) #include "ntqthread.h" #endif #include #include #include #ifdef QT_THREAD_SUPPORT #ifdef QT_USE_GLIBMAINLOOP extern TQMutex *tqt_timerListMutex; #endif // QT_USE_GLIBMAINLOOP #endif // QT_THREAD_SUPPORT /***************************************************************************** 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. TQObject::startTimer() and TQObject::killTimer() are for public use. The TQTimer 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 TQObject *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: TQObject *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 TQObject *obj; // - object to receive event }; typedef TQPtrList TimerList; // list of TimerInfo structs static TQBitArray *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 { #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex->lock(); #endif 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 ) { tqDebug( "TQObject: %d timers now exist for object %s::%s", dangerCount, ti->obj->className(), ti->obj->name() ); } #endif #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex->unlock(); #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 { #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex->lock(); #endif timeval diff = watchtime - time; TimerInfo *t = timerList->first(); while ( t ) { // repair all timers t->timeout = t->timeout - diff; t = timerList->next(); } #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex->unlock(); #endif } // // 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() { #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex->lock(); #endif 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; } #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex->unlock(); #endif return &tm; } if ( qt_wait_timer_max ) { tm = *qt_wait_timer_max; #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex->unlock(); #endif return &tm; } #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex->unlock(); #endif return 0; // no timers } // Timer initialization static void initTimers() // initialize timers { timerBitVec = new TQBitArray( 128 ); TQ_CHECK_PTR( timerBitVec ); int i = timerBitVec->size(); while( i-- > 0 ) { timerBitVec->clearBit( i ); } timerList = new TimerList; #if defined(QT_THREAD_SUPPORT) tqt_timerListMutex = new TQMutex(true); #endif TQ_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, TQObject *obj ) { #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->lock(); #endif if ( !timerList ) { // initialize timer data initTimers(); #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->lock(); #endif } int id = allocTimerId(); // get free timer id if ( (id <= 0) || (id > (int)timerBitVec->size()) || (!obj) ) { // cannot create timer #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif return 0; } timerBitVec->setBit( id-1 ); // set timer active TimerInfo *t = new TimerInfo; // create timer TQ_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 #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif return id; } bool qKillTimer( int id ) { #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->lock(); #endif TimerInfo *t; if ( (!timerList) || (id <= 0) || (id > (int)timerBitVec->size()) || (!timerBitVec->testBit( id-1 )) ) { #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif 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 bool ret; timerBitVec->clearBit( id-1 ); // set timer inactive ret = timerList->remove(); #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif return ret; } else { // id not found #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif return FALSE; } } bool qKillTimer( TQObject *obj ) { #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->lock(); #endif TimerInfo *t; if ( !timerList ) { // not initialized #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif 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(); } } #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif return TRUE; } TQEventLoopPrivate::TQEventLoopPrivate() { #if defined(Q_WS_X11) xfd = -1; x_gPollFD.fd = -1; x_gPollFD.events = 0; x_gPollFD.revents = 0; #endif // Q_WS_X11 singletoolkit = TRUE; ctx = 0; ctx_is_default = false; reset(); } TQEventLoopPrivate::~TQEventLoopPrivate() { // } void TQEventLoopPrivate::reset() { looplevel = 0; quitcode = 0; quitnow = FALSE; exitloop = FALSE; shortcut = FALSE; } /***************************************************************************** TQEventLoop implementations for Glib-Main-Loop *****************************************************************************/ void TQEventLoop::registerSocketNotifier( TQSocketNotifier *notifier ) { int sockfd = notifier->socket(); int type = notifier->type(); if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 ) { #if defined(QT_CHECK_RANGE) tqWarning( "TQSocketNotifier: Internal error" ); #endif return; } #ifdef DEBUG_QT_GLIBMAINLOOP printf("register socket notifier %d\n", sockfd); #endif TQPtrList *list = &d->sn_list; TQSockNotGPollFD *sn; /* if ( ! list ) { // create new list, the TQSockNotType destructor will delete it for us list = new TQPtrList; TQ_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 TQSockNotGPollFD; TQ_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 TQEventLoop::unregisterSocketNotifier( TQSocketNotifier *notifier ) { int sockfd = notifier->socket(); int type = notifier->type(); if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 ) { #if defined(QT_CHECK_RANGE) tqWarning( "TQSocketNotifier: Internal error" ); #endif return; } #ifdef DEBUG_QT_GLIBMAINLOOP printf("unregister socket notifier %d\n", sockfd); #endif TQPtrList *list = &d->sn_list; TQSockNotGPollFD *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 TQEventLoop::setSocketNotifierPending( TQSocketNotifier *notifier ) { int sockfd = notifier->socket(); int type = notifier->type(); if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 ) { #if defined(QT_CHECK_RANGE) tqWarning( "TQSocketNotifier: Internal error" ); #endif return; } #ifdef DEBUG_QT_GLIBMAINLOOP printf("set socket notifier pending %d\n", sockfd); #endif TQPtrList *list = &d->sn_list; TQSockNotGPollFD *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 TQEventLoop::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 ) { if (::write( d->thread_pipe[1], &c, 1 ) < 0) { // Failed! } } } int TQEventLoop::timeToWait() const { timeval *tm = qt_wait_timer(); if ( !tm ) { // no active timers return -1; } return (tm->tv_sec*1000) + (tm->tv_usec/1000); } int TQEventLoop::activateTimers() { #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->lock(); #endif if ( !timerList || !timerList->count() ) { // no timers #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif return 0; } bool first = TRUE; timeval currentTime; int n_act = 0, maxCount = timerList->count(); TimerInfo *begin = 0; 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++; } #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif TQTimerEvent e( t->id ); #if defined(QT_THREAD_SUPPORT) // Be careful...the current thread may not be the target object's thread! if ((!t->obj) || (TQThread::currentThreadObject() && TQThread::currentThreadObject()->threadPostedEventsDisabled()) || (t->obj && t->obj->contextThreadObject() == TQThread::currentThreadObject())) { TQApplication::sendEvent( t->obj, &e ); // send event } else { TQApplication::postEvent( t->obj, new TQTimerEvent(e) ); // post event to correct thread } #else // defined(QT_THREAD_SUPPORT) TQApplication::sendEvent( t->obj, &e ); // send event #endif // defined(QT_THREAD_SUPPORT) #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->lock(); #endif if ( timerList->findRef( begin ) == -1 ) { begin = 0; } } #if defined(QT_THREAD_SUPPORT) if (tqt_timerListMutex) tqt_timerListMutex->unlock(); #endif return n_act; } int TQEventLoop::activateSocketNotifiers() { if ( d->sn_pending_list.isEmpty() ) { return 0; } // activate entries int n_act = 0; TQEvent event( TQEvent::SockAct ); TQPtrListIterator it( d->sn_pending_list ); TQSockNotGPollFD *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; #if defined(QT_THREAD_SUPPORT) // Be careful...the current thread may not be the target object's thread! if ((!sn->obj) || (TQThread::currentThreadObject() && TQThread::currentThreadObject()->threadPostedEventsDisabled()) || (sn->obj && sn->obj->contextThreadObject() == TQThread::currentThreadObject())) { TQApplication::sendEvent( sn->obj, &event ); // send event } else { TQApplication::postEvent( sn->obj, new TQEvent(event) ); // post event to correct thread } #else // defined(QT_THREAD_SUPPORT) TQApplication::sendEvent( sn->obj, &event ); // send event #endif // defined(QT_THREAD_SUPPORT) n_act++; } } return n_act; }