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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* cam - Event loop
*/
#pragma once
#include <chrono>
#include <deque>
#include <functional>
#include <list>
#include <memory>
#include <mutex>
#include <libcamera/base/class.h>
#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(std::function<void()> &&func);
void addFdEvent(int fd, EventType type,
std::function<void()> &&handler);
void addTimerEvent(const std::chrono::microseconds period,
std::function<void()> &&handler);
private:
LIBCAMERA_DISABLE_COPY_AND_MOVE(EventLoop)
struct Event {
Event(std::function<void()> &&callback);
LIBCAMERA_DISABLE_COPY_AND_MOVE(Event)
~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::deque<std::function<void()>> calls_;
struct event *callsTrigger_ = nullptr;
std::list<std::unique_ptr<Event>> events_;
std::mutex lock_;
};
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