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

   1 //
   2 // detail/work_dispatcher.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 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   work_dispatcher(Handler& handler)
  34     : work_((get_associated_executor)(handler)),
  35       handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
  36   {
  37   }
  38
  39 #if defined(BOOST_ASIO_HAS_MOVE)
  40   work_dispatcher(const work_dispatcher& other)
  41     : work_(other.work_),
  42       handler_(other.handler_)
  43   {
  44   }
  45
  46   work_dispatcher(work_dispatcher&& other)
  47     : work_(BOOST_ASIO_MOVE_CAST(executor_work_guard<
  48         typename associated_executor<Handler>::type>)(other.work_)),
  49       handler_(BOOST_ASIO_MOVE_CAST(Handler)(other.handler_))
  50   {
  51   }
  52 #endif // defined(BOOST_ASIO_HAS_MOVE)
  53
  54   void operator()()
  55   {
  56     typename associated_allocator<Handler>::type alloc(
  57         (get_associated_allocator)(handler_));
  58     work_.get_executor().dispatch(
  59         BOOST_ASIO_MOVE_CAST(Handler)(handler_), alloc);
  60     work_.reset();
  61   }
  62
  63 private:
  64   executor_work_guard<typename associated_executor<Handler>::type> work_;
  65   Handler handler_;
  66 };
  67
  68 } // namespace detail
  69 } // namespace asio
  70 } // namespace boost
  71
  72 #include <boost/asio/detail/pop_options.hpp>
  73
  74 #endif // BOOST_ASIO_DETAIL_WORK_DISPATCHER_HPP