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/*
* Copyright (C) 2013-2015, 2019 by the Konclude Developer Team.
*
* This file is part of the reasoning system Konclude.
* For details and support, see <http://konclude.com/>.
*
* Konclude is free software: you can redistribute it and/or modify
* it under the terms of version 3 of the GNU Lesser General Public
* License (LGPLv3) as published by the Free Software Foundation.
*
* Konclude is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU (Lesser) General Public License for more details.
*
* You should have received a copy of the GNU (Lesser) General Public
* License along with Konclude. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "CEventThread.h"
namespace Konclude {
namespace Concurrent {
CEventThread::CEventThread() : CThread("EventThread") {
mHandleEventsCountPerStep = 10;
mHandleEventStopped = false;
mEventSignalized = false;
mLastProcessingStartedTag = 0;
mLastProcessingStartRequestTag = 0;
mEventProcessingStopped = true;
threadContext = nullptr;
}
CEventThread::~CEventThread() {
}
CEventHandler* CEventThread::createInstalledEventHandler(CEventProcessor* eventProcessor) {
CQueuedLinkedEventHandler* eventHandler = new CQueuedLinkedEventHandler(eventProcessor,this);
mAddEventHandlerSyncMutex.lock();
CXLinker<CEventHandler*>* eventHandlerLinker = new CXLinker<CEventHandler*>(eventHandler,mEventHandlerLinker);
mEventHandlerLinker = eventHandlerLinker;
mAddEventHandlerSyncMutex.unlock();
return eventHandler;
}
CThreadActivator* CEventThread::signalizeEvent() {
mEventSignalized = true;
if (mEventProcessingStopped) {
// post processing event
if (mLastProcessingStartedTag == mLastProcessingStartRequestTag) {
++mLastProcessingStartRequestTag;
postEvent(new CHandleEventsEvent());
}
}
return this;
}
bool CEventThread::processControlEvents(QEvent::Type type, CControlEvent *event) {
if (CThread::processControlEvents(type,event)) {
return true;
} else {
if (type == CHandleEventsEvent::EVENTTYPE) {
mLastProcessingStartedTag = mLastProcessingStartRequestTag;
handleEvents();
return true;
}
}
return false;
}
bool CEventThread::handleEvents(double minEventPriority, cint64 maxHandleEventCount) {
bool handleNextRound = true;
mEventProcessingStopped = false;
bool roundEventProcessed = false;
while (handleNextRound && !mHandleEventStopped) {
roundEventProcessed = false;
CXLinker<CEventHandler*>* eventHandlerLinkerIt = mEventHandlerLinker;
if (eventHandlerLinkerIt) {
while (maxHandleEventCount != 0 && !mHandleEventStopped) {
CEventHandler* eventHandler = eventHandlerLinkerIt->getData();
if (eventHandler->needEventProcessing(minEventPriority)) {
cint64 maxHandleEventCountStep = mHandleEventsCountPerStep;
if (maxHandleEventCount > 0) {
if (maxHandleEventCountStep > maxHandleEventCount) {
maxHandleEventCountStep = maxHandleEventCount;
}
}
cint64 handledEventCount = eventHandler->handleEvents(threadContext,minEventPriority,maxHandleEventCountStep);
if (maxHandleEventCount > 0) {
maxHandleEventCount -= handledEventCount;
}
roundEventProcessed = handledEventCount > 0;
}
if (roundEventProcessed) {
mEventProcessingStopped = false;
}
// round robin
eventHandlerLinkerIt = eventHandlerLinkerIt->getNext();
if (!eventHandlerLinkerIt) {
if (mEventSignalized || roundEventProcessed) {
handleNextRound = true;
mEventSignalized = false;
} else {
if (!mEventProcessingStopped) {
handleNextRound = true;
mEventProcessingStopped = true;
mEventSignalized = false;
} else {
handleNextRound = false;
}
}
eventHandlerLinkerIt = mEventHandlerLinker;
}
}
} else {
handleNextRound = false;
}
}
return true;
}
}; // end namespace Concurrent
}; // end namespace Konclude
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