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/**
* @file
* @author 2016 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
* @copyright Simplified BSD
*
* @cond
* This program is free software: you can redistribute it and/or modify
* it under the terms of the FreeBSD license as published by the FreeBSD
* project.
*
* This program 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.
*
* You should have received a copy of the FreeBSD license along with this
* program. If not, see <http://www.opensource.org/licenses/bsd-license>.
* @endcond
*/
#ifndef EVENTSOURCE_H_775AB206
#define EVENTSOURCE_H_775AB206
#include "uscxml/Common.h"
#include "uscxml/messages/Event.h"
#include <string>
#include <map>
#include <list>
#include <thread>
#include <mutex>
#include <condition_variable>
#include <event2/event.h>
namespace uscxml {
class USCXML_API EventQueueImpl {
public:
EventQueueImpl();
virtual ~EventQueueImpl();
virtual Event dequeue(bool blocking);
virtual void enqueue(const Event& event);
protected:
std::list<Event> _queue;
std::recursive_mutex _mutex;
std::condition_variable_any _cond;
};
class USCXML_API DelayedEventQueueCallbacks {
public:
virtual void eventReady(Event& event, const std::string& eventId) = 0;
};
class USCXML_API DelayedEventQueueImpl : public EventQueueImpl {
public:
DelayedEventQueueImpl(DelayedEventQueueCallbacks* callbacks);
virtual ~DelayedEventQueueImpl();
virtual void enqueueDelayed(const Event& event, size_t delayMs, const std::string& eventUUID);
virtual void cancelDelayed(const std::string& eventId);
virtual void cancelAllDelayed();
protected:
struct callbackData {
Event userData;
std::string eventUUID;
bool persist;
struct event *event;
DelayedEventQueueImpl* eventQueue;
};
bool _isStarted;
std::thread* _thread;
std::map<std::string, callbackData> _callbackData;
struct event_base* _eventLoop;
struct event* _dummyEvent;
static void run(void* instance);
void start();
void stop();
static void timerCallback(evutil_socket_t fd, short what, void *arg);
DelayedEventQueueCallbacks* _callbacks;
};
class USCXML_API EventQueue {
public:
PIMPL_OPERATORS(EventQueue)
virtual Event dequeue(bool blocking) {
return _impl->dequeue(blocking);
}
virtual void enqueue(const Event& event) {
return _impl->enqueue(event);
}
protected:
std::shared_ptr<EventQueueImpl> _impl;
};
class USCXML_API DelayedEventQueue : public EventQueue {
public:
PIMPL_OPERATORS2(DelayedEventQueue, EventQueue)
void enqueueDelayed(const Event& event, size_t delayMs, const std::string& eventUUID) {
_impl->enqueueDelayed(event, delayMs, eventUUID);
}
void cancelDelayed(const std::string& eventUUID) {
return _impl->cancelDelayed(eventUUID);
}
void cancelAllDelayed() {
return _impl->cancelAllDelayed();
}
protected:
std::shared_ptr<DelayedEventQueueImpl> _impl;
};
}
#endif /* end of include guard: EVENTSOURCE_H_775AB206 */
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