tibia-client/src/framework/core/eventdispatcher.cpp

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/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
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#include "eventdispatcher.h"
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#include <framework/core/clock.h>
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#include "timer.h"
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EventDispatcher g_dispatcher;
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void EventDispatcher::shutdown()
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{
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while(!m_eventList.empty())
poll();
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while(!m_scheduledEventList.empty()) {
ScheduledEventPtr scheduledEvent = m_scheduledEventList.top();
scheduledEvent->cancel();
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m_scheduledEventList.pop();
}
m_disabled = true;
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}
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void EventDispatcher::poll()
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{
int loops = 0;
for(int count = 0, max = m_scheduledEventList.size(); count < max && !m_scheduledEventList.empty(); ++count) {
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ScheduledEventPtr scheduledEvent = m_scheduledEventList.top();
if(scheduledEvent->reamaningTicks() > 0)
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break;
m_scheduledEventList.pop();
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scheduledEvent->execute();
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if(scheduledEvent->nextCycle())
m_scheduledEventList.push(scheduledEvent);
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}
// execute events list until all events are out, this is needed because some events can schedule new events that would
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// change the UIWidgets layout, in this case we must execute these new events before we continue rendering,
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m_pollEventsSize = m_eventList.size();
loops = 0;
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while(m_pollEventsSize > 0) {
if(loops > 50) {
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static Timer reportTimer;
if(reportTimer.running() && reportTimer.ticksElapsed() > 100) {
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g_logger.error("ATTENTION the event list is not getting empty, this could be caused by some bad code");
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reportTimer.restart();
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}
break;
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}
for(int i=0;i<m_pollEventsSize;++i) {
EventPtr event = m_eventList.front();
m_eventList.pop_front();
event->execute();
}
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m_pollEventsSize = m_eventList.size();
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}
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}
ScheduledEventPtr EventDispatcher::scheduleEvent(const std::function<void()>& callback, int delay)
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{
if(m_disabled)
return ScheduledEventPtr(new ScheduledEvent(nullptr, delay, 1));
assert(delay >= 0);
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ScheduledEventPtr scheduledEvent(new ScheduledEvent(callback, delay, 1));
m_scheduledEventList.push(scheduledEvent);
return scheduledEvent;
}
ScheduledEventPtr EventDispatcher::cycleEvent(const std::function<void()>& callback, int delay)
{
if(m_disabled)
return ScheduledEventPtr(new ScheduledEvent(nullptr, delay, 0));
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assert(delay > 0);
ScheduledEventPtr scheduledEvent(new ScheduledEvent(callback, delay, 0));
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m_scheduledEventList.push(scheduledEvent);
return scheduledEvent;
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}
EventPtr EventDispatcher::addEvent(const std::function<void()>& callback, bool pushFront)
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{
if(m_disabled)
return EventPtr(new Event(nullptr));
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EventPtr event(new Event(callback));
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// front pushing is a way to execute an event before others
if(pushFront) {
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m_eventList.push_front(event);
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// the poll event list only grows when pushing into front
m_pollEventsSize++;
} else
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m_eventList.push_back(event);
return event;
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}