Luna/libos/include/os/Timer.h

/**
 * @file Timer.h
 * @author apio (cloudapio.eu)
 * @brief Millisecond-precision timer.
 *
 * @copyright Copyright (c) 2024, the Luna authors.
 *
 */

#pragma once
#include <luna/Action.h>
#include <luna/LinkedList.h>
#include <luna/OwnedPtr.h>
#include <time.h>

namespace os
{
    class EventLoop;
    class Timer : LinkedListNode<Timer>
    {
      public:
        static Result<OwnedPtr<Timer>> create_singleshot(unsigned int milliseconds, Action&& action);
        static Result<OwnedPtr<Timer>> create_repeating(unsigned int milliseconds, Action&& action);

        void restart();
        void reset(unsigned int milliseconds);
        void stop();

        ~Timer();

      private:
        timer_t m_timerid { -1 };
        bool m_repeating;
        bool m_stopped { false };
        struct timespec m_interval;
        Action m_action;

        void check_if_should_invoke_action();
        void readd_if_necessary();

        Timer() = default;

        friend class EventLoop;
    };
}