queue.hpp

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/*
 * Copyright (C) 2023  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Antkeeper source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef ANTKEEPER_EVENT_QUEUE_HPP
#define ANTKEEPER_EVENT_QUEUE_HPP
 
#include <engine/event/dispatcher.hpp>
#include <functional>
#include <list>
 
namespace event {
 
class queue: public dispatcher
{
public: 
    template <class T>
    void enqueue(const T& message)
    {
        messages.emplace_back
        (
            [this, message]()
            {
                this->dispatch<T>(message);
            }
        );
    }
    
    void flush()
    {
        while (!messages.empty())
        {
            messages.front()();
            messages.pop_front();
        }
    }
    
    void clear()
    {
        messages.clear();
    }
    
    [[nodiscard]] inline bool empty() const noexcept
    {
        return messages.empty();
    }
 
private:
    std::list<std::function<void()>> messages;
};
 
} // namespace event
 
#endif // ANTKEEPER_EVENT_QUEUE_HPP