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#include "Event.hpp"
#include <easylogging++.h>
std::queue<Event> EventAgregator::eventsToHandle;
std::mutex EventAgregator::queueMutex;
bool EventAgregator::isStarted = false;
std::vector<EventListener *> EventAgregator::listeners;
std::mutex EventAgregator::listenersMutex;
EventListener::EventListener() {
EventAgregator::RegisterListener(*this);
}
EventListener::~EventListener() {
EventAgregator::UnregisterListener(*this);
}
void EventListener::PushEvent(Event event) {
eventsMutex.lock();
handlersMutex.lock();
if (handlers[event.type]) {
//LOG(ERROR) << "Listener notified about event " << int(event.type);
events.push(event);
}
handlersMutex.unlock();
eventsMutex.unlock();
}
bool EventListener::IsEventsQueueIsNotEmpty() {
eventsMutex.lock();
bool value = !events.empty();
eventsMutex.unlock();
return value;
}
void EventListener::RegisterHandler(EventType type, EventListener::HandlerFunc handler) {
handlersMutex.lock();
handlers[type] = handler;
handlersMutex.unlock();
}
void EventListener::HandleEvent() {
eventsMutex.lock();
if (events.empty()) {
eventsMutex.unlock();
return;
}
Event event = events.front();
events.pop();
eventsMutex.unlock();
handlersMutex.lock();
auto function = handlers[event.type];
handlersMutex.unlock();
function(event.data);
}
void EventAgregator::RegisterListener(EventListener &listener) {
listenersMutex.lock();
LOG(WARNING) << "Registered handler " << &listener;
listeners.push_back(&listener);
listenersMutex.unlock();
}
void EventAgregator::UnregisterListener(EventListener &listener) {
listenersMutex.lock();
LOG(WARNING) << "Unregistered handler " << &listener;
listeners.erase(std::find(listeners.begin(), listeners.end(), &listener));
listenersMutex.unlock();
}
void EventAgregator::PushEvent(EventType type, EventData data) {
Event event;
event.type = type;
event.data = data;
eventsToHandle.push(event);
if (!isStarted) {
isStarted = true;
std::thread(&EventAgregator::EventHandlingLoop).detach();
}
}
void EventAgregator::EventHandlingLoop() {
while (true) {
queueMutex.lock();
if (!eventsToHandle.empty()) {
auto queue = eventsToHandle;
while (!eventsToHandle.empty())
eventsToHandle.pop();
queueMutex.unlock();
while (!queue.empty()) {
auto event = queue.front();
listenersMutex.lock();
for (auto &listener : listeners) {
listener->PushEvent(event);
}
listenersMutex.unlock();
queue.pop();
}
queueMutex.lock();
}
queueMutex.unlock();
}
}
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