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Diffstat (limited to 'src/uscxml/interpreter/EventQueueImpl.h')
-rw-r--r-- | src/uscxml/interpreter/EventQueueImpl.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/uscxml/interpreter/EventQueueImpl.h b/src/uscxml/interpreter/EventQueueImpl.h new file mode 100644 index 0000000..10543c9 --- /dev/null +++ b/src/uscxml/interpreter/EventQueueImpl.h @@ -0,0 +1,125 @@ +/** + * @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 */ |