eventloop.h

/*
 * Copyright (C) 2018 Microchip Technology Inc.  All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef EGT_EVENTLOOP_H
#define EGT_EVENTLOOP_H
 
#include <egt/detail/meta.h>
#include <functional>
#include <memory>
#include <vector>
 
namespace egt
{
namespace asio
{
class io_context;
}
 
inline namespace v1
{
class Application;
 
namespace detail
{
class PriorityQueue;
}
 
class EGT_API EventLoop
{
public:
 
    explicit EventLoop(const Application& app) noexcept;
    EventLoop(const EventLoop&) = delete;
    EventLoop& operator=(const EventLoop&) = delete;
    EventLoop(EventLoop&&) = delete;
    EventLoop& operator=(EventLoop&&) = delete;
 
    asio::io_context& io();
 
    void draw();
 
    int run();
 
    int step();
 
    int poll();
 
    void quit(int exit_value = 0);
 
    using IdleCallback = std::function<void ()>;
 
    void add_idle_callback(IdleCallback func);
 
    detail::PriorityQueue& queue();
 
    ~EventLoop() noexcept;
 
protected:
 
    int wait();
 
    void invoke_idle_callbacks();
 
    struct EventLoopImpl;
 
    std::unique_ptr<EventLoopImpl> m_impl;
 
    std::vector<IdleCallback> m_idle;
 
    bool m_do_quit{false};
 
    int m_exit_value;
 
    const Application& m_app;
};
 
}
}
 
#endif