finalsuspender.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#pragma once
 
#include <coroutine>
 
namespace LC::Util::detail
{
    template<typename Promise>
    struct FinalSuspender
    {
        Promise& Promise_;
 
        bool await_ready () const noexcept { return false; }
 
        auto await_suspend (std::coroutine_handle<>) noexcept
        {
            const auto cont = Promise_.Continuation_.exchange ({});
            Promise_.DecRef ();
            return cont ? cont : std::noop_coroutine ();
        }
 
        void await_resume () const noexcept {}
    };
}