as_operation.hpp
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//
// execution/detail/as_operation.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef ASIO_EXECUTION_DETAIL_AS_OPERATION_HPP
#define ASIO_EXECUTION_DETAIL_AS_OPERATION_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#include "asio/detail/memory.hpp"
#include "asio/detail/type_traits.hpp"
#include "asio/execution/detail/as_invocable.hpp"
#include "asio/execution/execute.hpp"
#include "asio/execution/set_error.hpp"
#include "asio/traits/start_member.hpp"
#include "asio/detail/push_options.hpp"
namespace asio {
namespace execution {
namespace detail {
template <typename Executor, typename Receiver>
struct as_operation
{
typename remove_cvref<Executor>::type ex_;
typename remove_cvref<Receiver>::type receiver_;
#if !defined(ASIO_HAS_MOVE)
asio::detail::shared_ptr<asio::detail::atomic_count> ref_count_;
#endif // !defined(ASIO_HAS_MOVE)
template <typename E, typename R>
explicit as_operation(ASIO_MOVE_ARG(E) e, ASIO_MOVE_ARG(R) r)
: ex_(ASIO_MOVE_CAST(E)(e)),
receiver_(ASIO_MOVE_CAST(R)(r))
#if !defined(ASIO_HAS_MOVE)
, ref_count_(new asio::detail::atomic_count(1))
#endif // !defined(ASIO_HAS_MOVE)
{
}
void start() ASIO_NOEXCEPT
{
#if !defined(ASIO_NO_EXCEPTIONS)
try
{
#endif // !defined(ASIO_NO_EXCEPTIONS)
execution::execute(
ASIO_MOVE_CAST(typename remove_cvref<Executor>::type)(ex_),
as_invocable<typename remove_cvref<Receiver>::type,
Executor>(receiver_
#if !defined(ASIO_HAS_MOVE)
, ref_count_
#endif // !defined(ASIO_HAS_MOVE)
));
#if !defined(ASIO_NO_EXCEPTIONS)
}
catch (...)
{
#if defined(ASIO_HAS_STD_EXCEPTION_PTR)
execution::set_error(
ASIO_MOVE_OR_LVALUE(
typename remove_cvref<Receiver>::type)(
receiver_),
std::current_exception());
#else // defined(ASIO_HAS_STD_EXCEPTION_PTR)
std::terminate();
#endif // defined(ASIO_HAS_STD_EXCEPTION_PTR)
}
#endif // !defined(ASIO_NO_EXCEPTIONS)
}
};
} // namespace detail
} // namespace execution
namespace traits {
#if !defined(ASIO_HAS_DEDUCED_START_MEMBER_TRAIT)
template <typename Executor, typename Receiver>
struct start_member<
asio::execution::detail::as_operation<Executor, Receiver> >
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
typedef void result_type;
};
#endif // !defined(ASIO_HAS_DEDUCED_START_MEMBER_TRAIT)
} // namespace traits
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_EXECUTION_DETAIL_AS_OPERATION_HPP