summaryrefslogtreecommitdiffstats
path: root/src/Event.cpp
blob: 1f3a9e8522101e282c603cc43da496732957717f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
#include "Event.hpp"

#include <easylogging++.h>

#include "Utility.hpp"

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]) {
		events.push(event);
	}
	handlersMutex.unlock();
	eventsMutex.unlock();
}

void EventListener::DirectCall(Event event)
{
    handlersMutex.lock();
    if (handlers[event.type])
        handlers[event.type](event.data);
    handlersMutex.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;
    queueMutex.lock();
	eventsToHandle.push(event);
    queueMutex.unlock();
	if (!isStarted) {
		isStarted = true;
		std::thread(&EventAgregator::EventHandlingLoop).detach();
	}
}

void EventAgregator::DirectEventCall(EventType type, EventData data)
{
    Event event {type, data};
    listenersMutex.lock();
    for (auto &listener : listeners) {
        listenersMutex.unlock();
        listener->DirectCall(event);
        listenersMutex.lock();
    }
    listenersMutex.unlock();
}

void EventAgregator::EventHandlingLoop() {
    LoopExecutionTimeController timer(std::chrono::milliseconds(5));
	while (true) {
		queueMutex.lock();
		if (!eventsToHandle.empty()) {
			auto queue = std::move(eventsToHandle);            
			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();
        timer.Update();
	}
}