openMSX
EventDistributor.hh
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1#ifndef EVENTDISTRIBUTOR_HH
2#define EVENTDISTRIBUTOR_HH
3
4#include "Event.hh"
5#include <condition_variable>
6#include <mutex>
7#include <vector>
8
9namespace openmsx {
10
11class Reactor;
12class EventListener;
13
15{
16public:
20 enum Priority {
25 LOWEST, // should only be used internally in EventDistributor
26 };
27
28 explicit EventDistributor(Reactor& reactor);
29
38 Priority priority = OTHER);
39
46
51 void distributeEvent(Event&& event);
52
57 void deliverEvents();
58
65 bool sleep(unsigned us);
66
67private:
68 [[nodiscard]] bool isRegistered(EventType type, EventListener* listener) const;
69
70private:
71 Reactor& reactor;
72
73 struct Entry {
74 Priority priority;
75 EventListener* listener;
76 };
77 using PriorityMap = std::vector<Entry>; // sorted on priority
78 PriorityMap listeners[size_t(EventType::NUM_EVENT_TYPES)];
79 using EventQueue = std::vector<Event>;
80 EventQueue scheduledEvents;
81 std::mutex mutex; // lock datastructures
82 std::mutex cvMutex; // lock condition_variable
83 std::condition_variable condition;
84};
85
86} // namespace openmsx
87
88#endif
void unregisterEventListener(EventType type, EventListener &listener)
Unregisters a previously registered event listener.
void distributeEvent(Event &&event)
Schedule the given event for delivery.
EventDistributor(Reactor &reactor)
bool sleep(unsigned us)
Sleep for the specified amount of time, but return early when (another thread) called the distributeE...
void registerEventListener(EventType type, EventListener &listener, Priority priority=OTHER)
Registers a given object to receive certain events.
void deliverEvents()
This actually delivers the events.
Priority
Priorities from high to low, higher priority listeners can block events for lower priority listeners.
Contains the main loop of openMSX.
Definition: Reactor.hh:68
This file implemented 3 utility functions:
Definition: Autofire.cc:9
EventType
Definition: Event.hh:506