[ceph.git] / ceph / src / boost / boost / asio / impl / dispatch.hpp

//
// impl/dispatch.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 BOOST_ASIO_IMPL_DISPATCH_HPP
#define BOOST_ASIO_IMPL_DISPATCH_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include <boost/asio/detail/config.hpp>
#include <boost/asio/associated_allocator.hpp>
#include <boost/asio/associated_executor.hpp>
#include <boost/asio/detail/work_dispatcher.hpp>
#include <boost/asio/execution/allocator.hpp>
#include <boost/asio/execution/blocking.hpp>
#include <boost/asio/prefer.hpp>

#include <boost/asio/detail/push_options.hpp>

namespace boost {
namespace asio {
namespace detail {

class initiate_dispatch
{
public:
  template <typename CompletionHandler>
  void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
      typename enable_if<
        execution::is_executor<
          typename associated_executor<
            typename decay<CompletionHandler>::type
          >::type
        >::value
      >::type* = 0) const
  {
    typedef typename decay<CompletionHandler>::type handler_t;

    typename associated_executor<handler_t>::type ex(
        (get_associated_executor)(handler));

    typename associated_allocator<handler_t>::type alloc(
        (get_associated_allocator)(handler));

    execution::execute(
        boost::asio::prefer(ex,
          execution::blocking.possibly,
          execution::allocator(alloc)),
        BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler));
  }

  template <typename CompletionHandler>
  void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
      typename enable_if<
        !execution::is_executor<
          typename associated_executor<
            typename decay<CompletionHandler>::type
          >::type
        >::value
      >::type* = 0) const
  {
    typedef typename decay<CompletionHandler>::type handler_t;

    typename associated_executor<handler_t>::type ex(
        (get_associated_executor)(handler));

    typename associated_allocator<handler_t>::type alloc(
        (get_associated_allocator)(handler));

    ex.dispatch(BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), alloc);
  }
};

template <typename Executor>
class initiate_dispatch_with_executor
{
public:
  typedef Executor executor_type;

  explicit initiate_dispatch_with_executor(const Executor& ex)
    : ex_(ex)
  {
  }

  executor_type get_executor() const BOOST_ASIO_NOEXCEPT
  {
    return ex_;
  }

  template <typename CompletionHandler>
  void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
      typename enable_if<
        execution::is_executor<
          typename conditional<true, executor_type, CompletionHandler>::type
        >::value
        &&
        !detail::is_work_dispatcher_required<
          typename decay<CompletionHandler>::type,
          Executor
        >::value
      >::type* = 0) const
  {
    typedef typename decay<CompletionHandler>::type handler_t;

    typename associated_allocator<handler_t>::type alloc(
        (get_associated_allocator)(handler));

    execution::execute(
        boost::asio::prefer(ex_,
          execution::blocking.possibly,
          execution::allocator(alloc)),
        BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler));
  }

  template <typename CompletionHandler>
  void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
      typename enable_if<
        execution::is_executor<
          typename conditional<true, executor_type, CompletionHandler>::type
        >::value
        &&
        detail::is_work_dispatcher_required<
          typename decay<CompletionHandler>::type,
          Executor
        >::value
      >::type* = 0) const
  {
    typedef typename decay<CompletionHandler>::type handler_t;

    typedef typename associated_executor<
      handler_t, Executor>::type handler_ex_t;
    handler_ex_t handler_ex((get_associated_executor)(handler, ex_));

    typename associated_allocator<handler_t>::type alloc(
        (get_associated_allocator)(handler));

    execution::execute(
        boost::asio::prefer(ex_,
          execution::blocking.possibly,
          execution::allocator(alloc)),
        detail::work_dispatcher<handler_t, handler_ex_t>(
          BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), handler_ex));
  }

  template <typename CompletionHandler>
  void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
      typename enable_if<
        !execution::is_executor<
          typename conditional<true, executor_type, CompletionHandler>::type
        >::value
        &&
        !detail::is_work_dispatcher_required<
          typename decay<CompletionHandler>::type,
          Executor
        >::value
      >::type* = 0) const
  {
    typedef typename decay<CompletionHandler>::type handler_t;

    typename associated_allocator<handler_t>::type alloc(
        (get_associated_allocator)(handler));

    ex_.dispatch(BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), alloc);
  }

  template <typename CompletionHandler>
  void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
      typename enable_if<
        !execution::is_executor<
          typename conditional<true, executor_type, CompletionHandler>::type
        >::value
        &&
        detail::is_work_dispatcher_required<
          typename decay<CompletionHandler>::type,
          Executor
        >::value
      >::type* = 0) const
  {
    typedef typename decay<CompletionHandler>::type handler_t;

    typedef typename associated_executor<
      handler_t, Executor>::type handler_ex_t;
    handler_ex_t handler_ex((get_associated_executor)(handler, ex_));

    typename associated_allocator<handler_t>::type alloc(
        (get_associated_allocator)(handler));

    ex_.dispatch(detail::work_dispatcher<handler_t, handler_ex_t>(
          BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler),
          handler_ex), alloc);
  }

private:
  Executor ex_;
};

} // namespace detail

template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken>
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) dispatch(
    BOOST_ASIO_MOVE_ARG(CompletionToken) token)
{
  return async_initiate<CompletionToken, void()>(
      detail::initiate_dispatch(), token);
}

template <typename Executor,
    BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken>
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) dispatch(
    const Executor& ex, BOOST_ASIO_MOVE_ARG(CompletionToken) token,
    typename enable_if<
      execution::is_executor<Executor>::value || is_executor<Executor>::value
    >::type*)
{
  return async_initiate<CompletionToken, void()>(
      detail::initiate_dispatch_with_executor<Executor>(ex), token);
}

template <typename ExecutionContext,
    BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken>
inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) dispatch(
    ExecutionContext& ctx, BOOST_ASIO_MOVE_ARG(CompletionToken) token,
    typename enable_if<is_convertible<
      ExecutionContext&, execution_context&>::value>::type*)
{
  return async_initiate<CompletionToken, void()>(
      detail::initiate_dispatch_with_executor<
        typename ExecutionContext::executor_type>(
          ctx.get_executor()), token);
}

} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>

#endif // BOOST_ASIO_IMPL_DISPATCH_HPP
Commit	Line	Data
b32b8144 FG	1	//
	2	// impl/dispatch.hpp
	3	// ~~~~~~~~~~~~~~~~~
	4	//
f67539c2	5	// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
b32b8144 FG	6	//
	7	// Distributed under the Boost Software License, Version 1.0. (See accompanying
	8	// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
	9	//
	10
	11	#ifndef BOOST_ASIO_IMPL_DISPATCH_HPP
	12	#define BOOST_ASIO_IMPL_DISPATCH_HPP
	13
	14	#if defined(_MSC_VER) && (_MSC_VER >= 1200)
	15	# pragma once
	16	#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
	17
	18	#include <boost/asio/detail/config.hpp>
	19	#include <boost/asio/associated_allocator.hpp>
	20	#include <boost/asio/associated_executor.hpp>
	21	#include <boost/asio/detail/work_dispatcher.hpp>
20effc67 TL	22	#include <boost/asio/execution/allocator.hpp>
	23	#include <boost/asio/execution/blocking.hpp>
	24	#include <boost/asio/prefer.hpp>
b32b8144 FG	25
	26	#include <boost/asio/detail/push_options.hpp>
	27
	28	namespace boost {
	29	namespace asio {
92f5a8d4	30	namespace detail {
b32b8144	31
92f5a8d4	32	class initiate_dispatch
b32b8144	33	{
92f5a8d4 TL	34	public:
92f5a8d4 TL	35	template <typename CompletionHandler>
20effc67 TL	36	void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
	37	typename enable_if<
	38	execution::is_executor<
	39	typename associated_executor<
	40	typename decay<CompletionHandler>::type
	41	>::type
	42	>::value
	43	>::type* = 0) const
92f5a8d4	44	{
20effc67	45	typedef typename decay<CompletionHandler>::type handler_t;
b32b8144	46
20effc67	47	typename associated_executor<handler_t>::type ex(
92f5a8d4	48	(get_associated_executor)(handler));
b32b8144	49
20effc67 TL	50	typename associated_allocator<handler_t>::type alloc(
	51	(get_associated_allocator)(handler));
	52
	53	execution::execute(
	54	boost::asio::prefer(ex,
	55	execution::blocking.possibly,
	56	execution::allocator(alloc)),
	57	BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler));
	58	}
	59
	60	template <typename CompletionHandler>
	61	void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
	62	typename enable_if<
	63	!execution::is_executor<
	64	typename associated_executor<
	65	typename decay<CompletionHandler>::type
	66	>::type
	67	>::value
	68	>::type* = 0) const
	69	{
	70	typedef typename decay<CompletionHandler>::type handler_t;
	71
	72	typename associated_executor<handler_t>::type ex(
	73	(get_associated_executor)(handler));
	74
	75	typename associated_allocator<handler_t>::type alloc(
92f5a8d4	76	(get_associated_allocator)(handler));
b32b8144	77
92f5a8d4 TL	78	ex.dispatch(BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), alloc);
	79	}
	80	};
b32b8144	81
92f5a8d4 TL	82	template <typename Executor>
	83	class initiate_dispatch_with_executor
	84	{
	85	public:
	86	typedef Executor executor_type;
b32b8144	87
92f5a8d4 TL	88	explicit initiate_dispatch_with_executor(const Executor& ex)
	89	: ex_(ex)
	90	{
	91	}
b32b8144	92
92f5a8d4 TL	93	executor_type get_executor() const BOOST_ASIO_NOEXCEPT
	94	{
	95	return ex_;
	96	}
	97
	98	template <typename CompletionHandler>
20effc67 TL	99	void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
	100	typename enable_if<
	101	execution::is_executor<
	102	typename conditional<true, executor_type, CompletionHandler>::type
	103	>::value
	104	&&
	105	!detail::is_work_dispatcher_required<
	106	typename decay<CompletionHandler>::type,
	107	Executor
	108	>::value
	109	>::type* = 0) const
92f5a8d4	110	{
20effc67 TL	111	typedef typename decay<CompletionHandler>::type handler_t;
	112
	113	typename associated_allocator<handler_t>::type alloc(
	114	(get_associated_allocator)(handler));
	115
	116	execution::execute(
	117	boost::asio::prefer(ex_,
	118	execution::blocking.possibly,
	119	execution::allocator(alloc)),
	120	BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler));
	121	}
	122
	123	template <typename CompletionHandler>
	124	void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
	125	typename enable_if<
	126	execution::is_executor<
	127	typename conditional<true, executor_type, CompletionHandler>::type
	128	>::value
	129	&&
	130	detail::is_work_dispatcher_required<
	131	typename decay<CompletionHandler>::type,
	132	Executor
	133	>::value
	134	>::type* = 0) const
	135	{
	136	typedef typename decay<CompletionHandler>::type handler_t;
	137
	138	typedef typename associated_executor<
	139	handler_t, Executor>::type handler_ex_t;
	140	handler_ex_t handler_ex((get_associated_executor)(handler, ex_));
92f5a8d4	141
20effc67	142	typename associated_allocator<handler_t>::type alloc(
92f5a8d4	143	(get_associated_allocator)(handler));
b32b8144	144
20effc67 TL	145	execution::execute(
	146	boost::asio::prefer(ex_,
	147	execution::blocking.possibly,
	148	execution::allocator(alloc)),
	149	detail::work_dispatcher<handler_t, handler_ex_t>(
	150	BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), handler_ex));
	151	}
	152
	153	template <typename CompletionHandler>
	154	void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
	155	typename enable_if<
	156	!execution::is_executor<
	157	typename conditional<true, executor_type, CompletionHandler>::type
	158	>::value
	159	&&
	160	!detail::is_work_dispatcher_required<
	161	typename decay<CompletionHandler>::type,
	162	Executor
	163	>::value
	164	>::type* = 0) const
	165	{
	166	typedef typename decay<CompletionHandler>::type handler_t;
	167
	168	typename associated_allocator<handler_t>::type alloc(
	169	(get_associated_allocator)(handler));
	170
	171	ex_.dispatch(BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), alloc);
	172	}
	173
	174	template <typename CompletionHandler>
	175	void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
	176	typename enable_if<
	177	!execution::is_executor<
	178	typename conditional<true, executor_type, CompletionHandler>::type
	179	>::value
	180	&&
	181	detail::is_work_dispatcher_required<
	182	typename decay<CompletionHandler>::type,
	183	Executor
	184	>::value
	185	>::type* = 0) const
	186	{
	187	typedef typename decay<CompletionHandler>::type handler_t;
	188
	189	typedef typename associated_executor<
	190	handler_t, Executor>::type handler_ex_t;
	191	handler_ex_t handler_ex((get_associated_executor)(handler, ex_));
	192
	193	typename associated_allocator<handler_t>::type alloc(
	194	(get_associated_allocator)(handler));
	195
	196	ex_.dispatch(detail::work_dispatcher<handler_t, handler_ex_t>(
	197	BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler),
	198	handler_ex), alloc);
92f5a8d4	199	}
b32b8144	200
92f5a8d4 TL	201	private:
	202	Executor ex_;
	203	};
b32b8144	204
92f5a8d4	205	} // namespace detail
b32b8144	206
92f5a8d4 TL	207	template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken>
	208	BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) dispatch(
	209	BOOST_ASIO_MOVE_ARG(CompletionToken) token)
	210	{
	211	return async_initiate<CompletionToken, void()>(
	212	detail::initiate_dispatch(), token);
	213	}
	214
	215	template <typename Executor,
	216	BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken>
	217	BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) dispatch(
	218	const Executor& ex, BOOST_ASIO_MOVE_ARG(CompletionToken) token,
20effc67 TL	219	typename enable_if<
	220	execution::is_executor<Executor>::value \|\| is_executor<Executor>::value
	221	>::type*)
92f5a8d4 TL	222	{
	223	return async_initiate<CompletionToken, void()>(
	224	detail::initiate_dispatch_with_executor<Executor>(ex), token);
b32b8144 FG	225	}
b32b8144 FG	226
92f5a8d4 TL	227	template <typename ExecutionContext,
	228	BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) CompletionToken>
	229	inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, void()) dispatch(
b32b8144 FG	230	ExecutionContext& ctx, BOOST_ASIO_MOVE_ARG(CompletionToken) token,
	231	typename enable_if<is_convertible<
	232	ExecutionContext&, execution_context&>::value>::type*)
	233	{
20effc67 TL	234	return async_initiate<CompletionToken, void()>(
	235	detail::initiate_dispatch_with_executor<
	236	typename ExecutionContext::executor_type>(
	237	ctx.get_executor()), token);
b32b8144 FG	238	}
	239
	240	} // namespace asio
	241	} // namespace boost
	242
	243	#include <boost/asio/detail/pop_options.hpp>
	244
	245	#endif // BOOST_ASIO_IMPL_DISPATCH_HPP