Sophiar2/src/core/tristate_obj.h

#ifndef SOPHIAR2_TRISTATE_OBJ_H
#define SOPHIAR2_TRISTATE_OBJ_H

#include "core/global_io_context.hpp"

#include <coroutine>
#include <memory>

#include <boost/asio/awaitable.hpp>
#include <boost/core/noncopyable.hpp>

namespace sophiar {

    template<typename FreqTag>
    class tristate_obj : public use_context<FreqTag>, private boost::noncopyable {
    public:

        enum class state_type {
            INITIAL,
            INITIALIZING,
            RESETTING,
            PENDING,
            STARTING,
            STOPPING,
            RUNNING,
        };

        tristate_obj();

        virtual ~tristate_obj();

        boost::asio::awaitable<bool> init();

        boost::asio::awaitable<bool> start();

        boost::asio::awaitable<void> stop();

        boost::asio::awaitable<void> reset();

        state_type get_state() const;

    protected:

        virtual boost::asio::awaitable<bool> on_init() { co_return true; } // TODO add no_throw

        virtual boost::asio::awaitable<bool> on_start() { co_return true; }

        virtual boost::asio::awaitable<void> on_stop() { co_return; }

        virtual boost::asio::awaitable<void> on_reset() { co_return; }

    private:

        struct impl;
        std::unique_ptr<impl> pimpl;

    };

}

#endif //SOPHIAR2_TRISTATE_OBJ_H