ceph/src/boost/boost/asio/detail/work_dispatcher.hpp

   1 //
   2 // detail/work_dispatcher.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   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_DETAIL_WORK_DISPATCHER_HPP
  12 #define BOOST_ASIO_DETAIL_WORK_DISPATCHER_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_executor.hpp>
  20 #include <boost/asio/associated_allocator.hpp>
  21 #include <boost/asio/executor_work_guard.hpp>
  22
  23 #include <boost/asio/detail/push_options.hpp>
  24
  25 namespace boost {
  26 namespace asio {
  27 namespace detail {
  28
  29 template <typename Handler>
  30 class work_dispatcher
  31 {
  32 public:
  33   template <typename CompletionHandler>
  34   explicit work_dispatcher(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler)
  35     : work_((get_associated_executor)(handler)),
  36       handler_(BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler))
  37   {
  38   }
  39
  40 #if defined(BOOST_ASIO_HAS_MOVE)
  41   work_dispatcher(const work_dispatcher& other)
  42     : work_(other.work_),
  43       handler_(other.handler_)
  44   {
  45   }
  46
  47   work_dispatcher(work_dispatcher&& other)
  48     : work_(BOOST_ASIO_MOVE_CAST(executor_work_guard<
  49         typename associated_executor<Handler>::type>)(other.work_)),
  50       handler_(BOOST_ASIO_MOVE_CAST(Handler)(other.handler_))
  51   {
  52   }
  53 #endif // defined(BOOST_ASIO_HAS_MOVE)
  54
  55   void operator()()
  56   {
  57     typename associated_allocator<Handler>::type alloc(
  58         (get_associated_allocator)(handler_));
  59     work_.get_executor().dispatch(
  60         BOOST_ASIO_MOVE_CAST(Handler)(handler_), alloc);
  61     work_.reset();
  62   }
  63
  64 private:
  65   executor_work_guard<typename associated_executor<Handler>::type> work_;
  66   Handler handler_;
  67 };
  68
  69 } // namespace detail
  70 } // namespace asio
  71 } // namespace boost
  72
  73 #include <boost/asio/detail/pop_options.hpp>
  74
  75 #endif // BOOST_ASIO_DETAIL_WORK_DISPATCHER_HPP