/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2020, Google Inc.
 *
 * event_loop.h - Event loop based on cam's
 */
#ifndef __SIMPLE_CAM_EVENT_LOOP_H__
#define __SIMPLE_CAM_EVENT_LOOP_H__

#include <atomic>
#include <functional>
#include <list>
#include <mutex>

struct event_base;

class EventLoop
{
public:
	EventLoop();
	~EventLoop();

	void exit(int code = 0);
	int exec();

	void timeout(unsigned int sec);
	void callLater(const std::function<void()> &func);

private:
	static EventLoop *instance_;

	static void timeoutTriggered(int fd, short event, void *arg);

	struct event_base *event_;
	std::atomic<bool> exit_;
	int exitCode_;

	std::list<std::function<void()>> calls_;
	std::mutex lock_;

	void interrupt();
	void dispatchCalls();
};

#endif /* __SIMPLE_CAM_EVENT_LOOP_H__ */