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-//
-// execution/bulk_execute.hpp
-// ~~~~~~~~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2021 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_BULK_EXECUTE_HPP
-#define ASIO_EXECUTION_BULK_EXECUTE_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/type_traits.hpp"
-#include "asio/execution/bulk_guarantee.hpp"
-#include "asio/execution/detail/bulk_sender.hpp"
-#include "asio/execution/executor.hpp"
-#include "asio/execution/sender.hpp"
-#include "asio/traits/bulk_execute_member.hpp"
-#include "asio/traits/bulk_execute_free.hpp"
-
-#include "asio/detail/push_options.hpp"
-
-#if defined(GENERATING_DOCUMENTATION)
-
-namespace asio {
-namespace execution {
-
-/// A customisation point that creates a bulk sender.
-/**
- * The name <tt>execution::bulk_execute</tt> denotes a customisation point
- * object. If <tt>is_convertible_v<N, size_t></tt> is true, then the expression
- * <tt>execution::bulk_execute(S, F, N)</tt> for some subexpressions
- * <tt>S</tt>, <tt>F</tt>, and <tt>N</tt> is expression-equivalent to:
- *
- * @li <tt>S.bulk_execute(F, N)</tt>, if that expression is valid. If the
- * function selected does not execute <tt>N</tt> invocations of the function
- * object <tt>F</tt> on the executor <tt>S</tt> in bulk with forward progress
- * guarantee <tt>asio::query(S, execution::bulk_guarantee)</tt>, and
- * the result of that function does not model <tt>sender<void></tt>, the
- * program is ill-formed with no diagnostic required.
- *
- * @li Otherwise, <tt>bulk_execute(S, F, N)</tt>, if that expression is valid,
- * with overload resolution performed in a context that includes the
- * declaration <tt>void bulk_execute();</tt> and that does not include a
- * declaration of <tt>execution::bulk_execute</tt>. If the function selected
- * by overload resolution does not execute <tt>N</tt> invocations of the
- * function object <tt>F</tt> on the executor <tt>S</tt> in bulk with forward
- * progress guarantee <tt>asio::query(E,
- * execution::bulk_guarantee)</tt>, and the result of that function does not
- * model <tt>sender<void></tt>, the program is ill-formed with no diagnostic
- * required.
- *
- * @li Otherwise, if the types <tt>F</tt> and
- * <tt>executor_index_t<remove_cvref_t<S>></tt> model <tt>invocable</tt> and
- * if <tt>asio::query(S, execution::bulk_guarantee)</tt> equals
- * <tt>execution::bulk_guarantee.unsequenced</tt>, then
- *
- * - Evaluates <tt>DECAY_COPY(std::forward<decltype(F)>(F))</tt> on the
- * calling thread to create a function object <tt>cf</tt>. [Note:
- * Additional copies of <tt>cf</tt> may subsequently be created. --end
- * note.]
- *
- * - For each value of <tt>i</tt> in <tt>N</tt>, <tt>cf(i)</tt> (or copy of
- * <tt>cf</tt>)) will be invoked at most once by an execution agent that is
- * unique for each value of <tt>i</tt>.
- *
- * - May block pending completion of one or more invocations of <tt>cf</tt>.
- *
- * - Synchronizes with (C++Std [intro.multithread]) the invocations of
- * <tt>cf</tt>.
- *
- * @li Otherwise, <tt>execution::bulk_execute(S, F, N)</tt> is ill-formed.
- */
-inline constexpr unspecified bulk_execute = unspecified;
-
-/// A type trait that determines whether a @c bulk_execute expression is
-/// well-formed.
-/**
- * Class template @c can_bulk_execute is a trait that is derived from @c
- * true_type if the expression <tt>execution::bulk_execute(std::declval<S>(),
- * std::declval<F>(), std::declval<N>)</tt> is well formed; otherwise @c
- * false_type.
- */
-template <typename S, typename F, typename N>
-struct can_bulk_execute :
- integral_constant<bool, automatically_determined>
-{
-};
-
-} // namespace execution
-} // namespace asio
-
-#else // defined(GENERATING_DOCUMENTATION)
-
-namespace asio_execution_bulk_execute_fn {
-
-using asio::declval;
-using asio::enable_if;
-using asio::execution::bulk_guarantee_t;
-using asio::execution::detail::bulk_sender;
-using asio::execution::executor_index;
-using asio::execution::is_sender;
-using asio::is_convertible;
-using asio::is_same;
-using asio::remove_cvref;
-using asio::result_of;
-using asio::traits::bulk_execute_free;
-using asio::traits::bulk_execute_member;
-using asio::traits::static_require;
-
-void bulk_execute();
-
-enum overload_type
-{
- call_member,
- call_free,
- adapter,
- ill_formed
-};
-
-template <typename S, typename Args, typename = void, typename = void,
- typename = void, typename = void, typename = void, typename = void>
-struct call_traits
-{
- ASIO_STATIC_CONSTEXPR(overload_type, overload = ill_formed);
- ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
- typedef void result_type;
-};
-
-template <typename S, typename F, typename N>
-struct call_traits<S, void(F, N),
- typename enable_if<
- is_convertible<N, std::size_t>::value
- >::type,
- typename enable_if<
- bulk_execute_member<S, F, N>::is_valid
- >::type,
- typename enable_if<
- is_sender<
- typename bulk_execute_member<S, F, N>::result_type
- >::value
- >::type> :
- bulk_execute_member<S, F, N>
-{
- ASIO_STATIC_CONSTEXPR(overload_type, overload = call_member);
-};
-
-template <typename S, typename F, typename N>
-struct call_traits<S, void(F, N),
- typename enable_if<
- is_convertible<N, std::size_t>::value
- >::type,
- typename enable_if<
- !bulk_execute_member<S, F, N>::is_valid
- >::type,
- typename enable_if<
- bulk_execute_free<S, F, N>::is_valid
- >::type,
- typename enable_if<
- is_sender<
- typename bulk_execute_free<S, F, N>::result_type
- >::value
- >::type> :
- bulk_execute_free<S, F, N>
-{
- ASIO_STATIC_CONSTEXPR(overload_type, overload = call_free);
-};
-
-template <typename S, typename F, typename N>
-struct call_traits<S, void(F, N),
- typename enable_if<
- is_convertible<N, std::size_t>::value
- >::type,
- typename enable_if<
- !bulk_execute_member<S, F, N>::is_valid
- >::type,
- typename enable_if<
- !bulk_execute_free<S, F, N>::is_valid
- >::type,
- typename enable_if<
- is_sender<S>::value
- >::type,
- typename enable_if<
- is_same<
- typename result_of<
- F(typename executor_index<typename remove_cvref<S>::type>::type)
- >::type,
- typename result_of<
- F(typename executor_index<typename remove_cvref<S>::type>::type)
- >::type
- >::value
- >::type,
- typename enable_if<
- static_require<S, bulk_guarantee_t::unsequenced_t>::is_valid
- >::type>
-{
- ASIO_STATIC_CONSTEXPR(overload_type, overload = adapter);
- ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
- typedef bulk_sender<S, F, N> result_type;
-};
-
-struct impl
-{
-#if defined(ASIO_HAS_MOVE)
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(F, N)>::overload == call_member,
- typename call_traits<S, void(F, N)>::result_type
- >::type
- operator()(S&& s, F&& f, N&& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(F, N)>::is_noexcept))
- {
- return ASIO_MOVE_CAST(S)(s).bulk_execute(
- ASIO_MOVE_CAST(F)(f), ASIO_MOVE_CAST(N)(n));
- }
-
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(F, N)>::overload == call_free,
- typename call_traits<S, void(F, N)>::result_type
- >::type
- operator()(S&& s, F&& f, N&& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(F, N)>::is_noexcept))
- {
- return bulk_execute(ASIO_MOVE_CAST(S)(s),
- ASIO_MOVE_CAST(F)(f), ASIO_MOVE_CAST(N)(n));
- }
-
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(F, N)>::overload == adapter,
- typename call_traits<S, void(F, N)>::result_type
- >::type
- operator()(S&& s, F&& f, N&& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(F, N)>::is_noexcept))
- {
- return typename call_traits<S, void(F, N)>::result_type(
- ASIO_MOVE_CAST(S)(s), ASIO_MOVE_CAST(F)(f),
- ASIO_MOVE_CAST(N)(n));
- }
-#else // defined(ASIO_HAS_MOVE)
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(const F&, const N&)>::overload == call_member,
- typename call_traits<S, void(const F&, const N&)>::result_type
- >::type
- operator()(S& s, const F& f, const N& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(const F&, const N&)>::is_noexcept))
- {
- return s.bulk_execute(ASIO_MOVE_CAST(F)(f),
- ASIO_MOVE_CAST(N)(n));
- }
-
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(const F&, const N&)>::overload == call_member,
- typename call_traits<S, void(const F&, const N&)>::result_type
- >::type
- operator()(const S& s, const F& f, const N& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(const F&, const N&)>::is_noexcept))
- {
- return s.bulk_execute(ASIO_MOVE_CAST(F)(f),
- ASIO_MOVE_CAST(N)(n));
- }
-
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(const F&, const N&)>::overload == call_free,
- typename call_traits<S, void(const F&, const N&)>::result_type
- >::type
- operator()(S& s, const F& f, const N& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(const F&, const N&)>::is_noexcept))
- {
- return bulk_execute(s, ASIO_MOVE_CAST(F)(f),
- ASIO_MOVE_CAST(N)(n));
- }
-
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(const F&, const N&)>::overload == call_free,
- typename call_traits<S, void(const F&, const N&)>::result_type
- >::type
- operator()(const S& s, const F& f, const N& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(const F&, const N&)>::is_noexcept))
- {
- return bulk_execute(s, ASIO_MOVE_CAST(F)(f),
- ASIO_MOVE_CAST(N)(n));
- }
-
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(const F&, const N&)>::overload == adapter,
- typename call_traits<S, void(const F&, const N&)>::result_type
- >::type
- operator()(S& s, const F& f, const N& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(const F&, const N&)>::is_noexcept))
- {
- return typename call_traits<S, void(const F&, const N&)>::result_type(
- s, ASIO_MOVE_CAST(F)(f), ASIO_MOVE_CAST(N)(n));
- }
-
- template <typename S, typename F, typename N>
- ASIO_CONSTEXPR typename enable_if<
- call_traits<S, void(const F&, const N&)>::overload == adapter,
- typename call_traits<S, void(const F&, const N&)>::result_type
- >::type
- operator()(const S& s, const F& f, const N& n) const
- ASIO_NOEXCEPT_IF((
- call_traits<S, void(const F&, const N&)>::is_noexcept))
- {
- return typename call_traits<S, void(const F&, const N&)>::result_type(
- s, ASIO_MOVE_CAST(F)(f), ASIO_MOVE_CAST(N)(n));
- }
-#endif // defined(ASIO_HAS_MOVE)
-};
-
-template <typename T = impl>
-struct static_instance
-{
- static const T instance;
-};
-
-template <typename T>
-const T static_instance<T>::instance = {};
-
-} // namespace asio_execution_bulk_execute_fn
-namespace asio {
-namespace execution {
-namespace {
-
-static ASIO_CONSTEXPR
- const asio_execution_bulk_execute_fn::impl& bulk_execute =
- asio_execution_bulk_execute_fn::static_instance<>::instance;
-
-} // namespace
-
-template <typename S, typename F, typename N>
-struct can_bulk_execute :
- integral_constant<bool,
- asio_execution_bulk_execute_fn::call_traits<
- S, void(F, N)>::overload !=
- asio_execution_bulk_execute_fn::ill_formed>
-{
-};
-
-#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
-
-template <typename S, typename F, typename N>
-constexpr bool can_bulk_execute_v = can_bulk_execute<S, F, N>::value;
-
-#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
-
-template <typename S, typename F, typename N>
-struct is_nothrow_bulk_execute :
- integral_constant<bool,
- asio_execution_bulk_execute_fn::call_traits<
- S, void(F, N)>::is_noexcept>
-{
-};
-
-#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
-
-template <typename S, typename F, typename N>
-constexpr bool is_nothrow_bulk_execute_v
- = is_nothrow_bulk_execute<S, F, N>::value;
-
-#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
-
-template <typename S, typename F, typename N>
-struct bulk_execute_result
-{
- typedef typename asio_execution_bulk_execute_fn::call_traits<
- S, void(F, N)>::result_type type;
-};
-
-} // namespace execution
-} // namespace asio
-
-#endif // defined(GENERATING_DOCUMENTATION)
-
-#include "asio/detail/pop_options.hpp"
-
-#endif // ASIO_EXECUTION_BULK_EXECUTE_HPP