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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* event_loop.h - cam - Event loop
*/
#ifndef __CAM_EVENT_LOOP_H__
#define __CAM_EVENT_LOOP_H__
#include <functional>
#include <memory>
#include <list>
#include <mutex>
#include <event2/util.h>
struct event_base;
class EventLoop
{
public:
enum EventType {
Read = 1,
Write = 2,
};
EventLoop();
~EventLoop();
static EventLoop *instance();
int exec();
void exit(int code = 0);
void callLater(const std::function<void()> &func);
void addEvent(int fd, EventType type,
const std::function<void()> &handler);
private:
struct Event {
Event(const std::function<void()> &callback);
~Event();
static void dispatch(int fd, short events, void *arg);
std::function<void()> callback_;
struct event *event_;
};
static EventLoop *instance_;
struct event_base *base_;
int exitCode_;
std::list<std::function<void()>> calls_;
std::list<std::unique_ptr<Event>> events_;
std::mutex lock_;
static void dispatchCallback(evutil_socket_t fd, short flags,
void *param);
void dispatchCall();
};
#endif /* __CAM_EVENT_LOOP_H__ */
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