path: root/src/Event.cpp

#include "Event.hpp"

#include <optick.h>

std::list<EventListener*> EventSystem::listeners;
std::recursive_mutex EventSystem::listenersMutex;

EventListener::EventListener() {
	std::lock_guard<std::recursive_mutex> lock(EventSystem::listenersMutex);
	EventSystem::listeners.push_back(this);
}

EventListener::~EventListener() {
	std::lock_guard<std::recursive_mutex> lock(EventSystem::listenersMutex);
	EventSystem::listeners.remove(this);
}

void EventListener::HandleEvent() {
	OPTICK_EVENT();
	if (!NotEmpty())
		return;

	std::lock_guard<std::recursive_mutex> eventsLock (eventsMutex);
	Event event = events.front();
	events.pop();
	std::lock_guard<std::recursive_mutex> handlersLock (handlersMutex);
	if (handlers[event.id]) {
		handlers[event.id](event);
	}
}

void EventListener::HandleAllEvents() {
	OPTICK_EVENT();
    if (!NotEmpty())
        return;

	std::lock_guard<std::recursive_mutex> eventsLock (eventsMutex);
    std::lock_guard<std::recursive_mutex> handlersLock (handlersMutex);
	while (!events.empty()) {
		Event event = events.front();
		events.pop();
		if (handlers[event.id]) {
			handlers[event.id](event);
		}
	}
}

bool EventListener::NotEmpty() {
    PollEvents();
	std::lock_guard<std::recursive_mutex> eventsLock (eventsMutex);
	bool ret = !events.empty();
	return ret;
}

void EventListener::RegisterHandler(size_t eventId, const EventListener::HandlerType &data) {
	std::lock_guard<std::recursive_mutex> handlersLock (handlersMutex);
	handlers[eventId] = data;
}

void EventListener::PollEvents() {
	OPTICK_EVENT();
    std::lock_guard<std::recursive_mutex> rawLock (rawEventsMutex);
    if (rawEvents.empty())
        return;
    
    std::lock_guard<std::recursive_mutex> eventsLock (eventsMutex);
    std::lock_guard<std::recursive_mutex> handlersLock (handlersMutex);
    while (!rawEvents.empty()) {
        Event event = rawEvents.front();
        rawEvents.pop();
        if (handlers[event.id])
            events.push(event);
    }
}