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-rw-r--r--src/gui/kernel/qeventdispatcher_qpa.cpp334
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diff --git a/src/gui/kernel/qeventdispatcher_qpa.cpp b/src/gui/kernel/qeventdispatcher_qpa.cpp
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--- a/src/gui/kernel/qeventdispatcher_qpa.cpp
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-/****************************************************************************
-**
-** 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.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** 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 Technology Preview License Agreement accompanying
-** this package.
-**
-** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** If you have questions regarding the use of this file, please contact
-** Nokia at qt-info@nokia.com.
-**
-**
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qplatformdefs.h"
-#include "qapplication.h"
-#include "qeventdispatcher_qpa_p.h"
-#include "private/qeventdispatcher_unix_p.h"
-#include "qapplication_p.h"
-#include "qplatformeventloopintegration_qpa.h"
-
-#include <QWindowSystemInterface>
-#include <QtCore/QElapsedTimer>
-#include <QtCore/QAtomicInt>
-#include <QtCore/QSemaphore>
-
-#include <QtCore/QDebug>
-
-#include <errno.h>
-
-QT_BEGIN_NAMESPACE
-
-QT_USE_NAMESPACE
-
-class Rendezvous
-{
-public:
- void checkpoint()
- {
- if (state.testAndSetOrdered(0,1)) {
- semaphore.acquire();
- } else if (state.testAndSetAcquire(1,0)) {
- semaphore.release();
- } else {
- qWarning("Barrier internal error");
- }
- }
-private:
- QSemaphore semaphore;
- QAtomicInt state;
-};
-
-class SelectWorker : public QThread
-{
-public:
- SelectWorker(QEventDispatcherQPAPrivate *eventDispatcherPrivate)
- : QThread(),
- m_edPrivate(eventDispatcherPrivate),
- m_retVal(0)
- {
- }
-
- void setSelectValues(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds)
- {
- m_nfds = nfds;
- m_readfds = readfds;
- m_writefds = writefds;
- m_exceptfds = exceptfds;
-
-
- }
-
- int retVal() const {
- return m_retVal;
- }
-
-protected:
- void run();
-
-private:
- QEventDispatcherQPAPrivate *m_edPrivate;
- int m_retVal;
-
- int m_nfds;
- fd_set *m_readfds, *m_writefds, *m_exceptfds;
-};
-
-class QEventDispatcherQPAPrivate : public QEventDispatcherUNIXPrivate
-{
- Q_DECLARE_PUBLIC(QEventDispatcherQPA)
-public:
- QEventDispatcherQPAPrivate()
- : eventLoopIntegration(0),
- barrierBeforeBlocking(0),
- barrierReturnValue(0),
- selectReturnMutex(0),
- selectWorkerNeedsSync(true),
- selectWorkerHasResult(false),
- m_integrationInitialised(false),
- m_hasIntegration(false),
- m_isEventLoopIntegrationRunning(false)
- {
-
- }
-
- ~QEventDispatcherQPAPrivate()
- {
- delete selectWorker;
- delete eventLoopIntegration;
- delete barrierBeforeBlocking;
- delete barrierReturnValue;
- delete selectReturnMutex;
- }
-
- bool hasIntegration() const
- {
- if (!m_integrationInitialised) {
- QEventDispatcherQPAPrivate *that = const_cast<QEventDispatcherQPAPrivate *>(this);
- if (qApp && (qApp->thread() == QThread::currentThread())) { // guiThread
- if (QGuiApplicationPrivate::platformIntegration()) {
- that->eventLoopIntegration = QGuiApplicationPrivate::platformIntegration()->createEventLoopIntegration();
- if (that->eventLoopIntegration) {
- that->selectWorker = new SelectWorker(that);
- that->barrierBeforeBlocking = new Rendezvous;
- that->barrierReturnValue = new Rendezvous;
- that->selectReturnMutex = new QMutex;
- that->selectWorker->start();
- that->m_hasIntegration = true;
- if (!QElapsedTimer::isMonotonic())
- qWarning("Having eventloop integration without monotonic timers can lead to undefined behaviour");
- }
- }
- }
- that->m_integrationInitialised = true;
- }
- return m_hasIntegration;
- }
-
- bool isEventLoopIntegrationRunning() const
- {
- return m_isEventLoopIntegrationRunning;
- }
-
- void runEventLoopIntegration()
- {
- if (qApp && (qApp->thread() == QThread::currentThread())) {
- m_isEventLoopIntegrationRunning = true;
- eventLoopIntegration->startEventLoop();
- }
- }
-
- QPlatformEventLoopIntegration *eventLoopIntegration;
- Rendezvous *barrierBeforeBlocking;
- Rendezvous *barrierReturnValue;
-
- QMutex *selectReturnMutex;
- bool selectWorkerNeedsSync;
- bool selectWorkerHasResult;
-
- SelectWorker *selectWorker;
-private:
- bool m_integrationInitialised;
- bool m_hasIntegration;
- bool m_isEventLoopIntegrationRunning;
-};
-
-QEventDispatcherQPA::QEventDispatcherQPA(QObject *parent)
- : QEventDispatcherUNIX(*new QEventDispatcherQPAPrivate, parent)
-{ }
-
-QEventDispatcherQPA::~QEventDispatcherQPA()
-{ }
-
-bool QEventDispatcherQPA::processEvents(QEventLoop::ProcessEventsFlags flags)
-{
- Q_D(QEventDispatcherQPA);
-
- if (d->hasIntegration()) {
- if (!d->isEventLoopIntegrationRunning()) {
- d->runEventLoopIntegration();
- }
- if (d->threadData->quitNow) {
- d->eventLoopIntegration->quitEventLoop();
- return false;
- }
- }
-
- int nevents = 0;
-
- // handle gui and posted events
- d->interrupt = false;
- QApplication::sendPostedEvents();
-
- while (!d->interrupt) { // also flushes output buffer ###can be optimized
- QWindowSystemInterfacePrivate::WindowSystemEvent *event;
- if (!(flags & QEventLoop::ExcludeUserInputEvents)
- && QWindowSystemInterfacePrivate::windowSystemEventsQueued() > 0) {
- // process a pending user input event
- event = QWindowSystemInterfacePrivate::getWindowSystemEvent();
- if (!event)
- break;
- } else {
- break;
- }
-
- if (filterEvent(event)) {
- delete event;
- continue;
- }
- nevents++;
-
- QGuiApplicationPrivate::processWindowSystemEvent(event);
- delete event;
- }
-
- if (!d->interrupt) {
- if (QEventDispatcherUNIX::processEvents(flags)) {
- QEventDispatcherUNIX::processEvents(flags);
- return true;
- }
- }
- return (nevents > 0);
-}
-
-bool QEventDispatcherQPA::hasPendingEvents()
-{
- extern uint qGlobalPostedEventsCount(); // from qapplication.cpp
- return qGlobalPostedEventsCount() || QWindowSystemInterfacePrivate::windowSystemEventsQueued();
-}
-
-void QEventDispatcherQPA::registerSocketNotifier(QSocketNotifier *notifier)
-{
- Q_D(QEventDispatcherQPA);
- QEventDispatcherUNIX::registerSocketNotifier(notifier);
- if (d->hasIntegration())
- wakeUp();
-
-}
-
-void QEventDispatcherQPA::unregisterSocketNotifier(QSocketNotifier *notifier)
-{
- Q_D(QEventDispatcherQPA);
- QEventDispatcherUNIX::unregisterSocketNotifier(notifier);
- if (d->hasIntegration())
- wakeUp();
-}
-
-void QEventDispatcherQPA::flush()
-{
- if(qApp)
- qApp->sendPostedEvents();
-}
-
-int QEventDispatcherQPA::select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
- timeval *timeout)
-{
- Q_D(QEventDispatcherQPA);
- int retVal = 0;
- if (d->hasIntegration()) {
- qint64 timeoutmsec = 0;
- if (timeout)
- timeoutmsec = timeout->tv_sec * 1000 + (timeout->tv_usec/1000);
- d->selectReturnMutex->lock();
- if (d->selectWorkerNeedsSync) {
- if (d->selectWorkerHasResult) {
- retVal = d->selectWorker->retVal();
- d->selectWorkerHasResult = false;
-
- d->selectReturnMutex->unlock();
- d->barrierReturnValue->checkpoint();
- d->eventLoopIntegration->setNextTimerEvent(0);
- return retVal;
- } else {
- d->selectWorkerNeedsSync = false;
- d->selectWorker->setSelectValues(nfds,readfds, writefds, exceptfds);
- d->barrierBeforeBlocking->checkpoint();
- }
- }
- d->selectReturnMutex->unlock();
- d->eventLoopIntegration->setNextTimerEvent(timeoutmsec);
- retVal = 0; //is 0 if select has not returned
- } else {
- retVal = QEventDispatcherUNIX::select(nfds, readfds, writefds, exceptfds, timeout);
- }
- return retVal;
-}
-
-
-void SelectWorker::run()
-{
-
- while(true) {
- m_retVal = 0;
- m_edPrivate->barrierBeforeBlocking->checkpoint(); // wait for mainthread
- int tmpRet = qt_safe_select(m_nfds,m_readfds,m_writefds,m_exceptfds,0);
- m_edPrivate->selectReturnMutex->lock();
- m_edPrivate->eventLoopIntegration->qtNeedsToProcessEvents();
-
- m_edPrivate->selectWorkerNeedsSync = true;
- m_edPrivate->selectWorkerHasResult = true;
- m_retVal = tmpRet;
-
- m_edPrivate->selectReturnMutex->unlock();
- m_edPrivate->barrierReturnValue->checkpoint();
- }
-}
-QT_END_NAMESPACE