ceph/src/boost/boost/asio/impl/system_executor.hpp

   1 //
   2 // impl/system_executor.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_IMPL_SYSTEM_EXECUTOR_HPP
  12 #define BOOST_ASIO_IMPL_SYSTEM_EXECUTOR_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/executor_op.hpp>
  19 #include <boost/asio/detail/global.hpp>
  20 #include <boost/asio/detail/recycling_allocator.hpp>
  21 #include <boost/asio/detail/type_traits.hpp>
  22 #include <boost/asio/system_context.hpp>
  23
  24 #include <boost/asio/detail/push_options.hpp>
  25
  26 namespace boost {
  27 namespace asio {
  28
  29 inline system_context& system_executor::context() const BOOST_ASIO_NOEXCEPT
  30 {
  31   return detail::global<system_context>();
  32 }
  33
  34 template <typename Function, typename Allocator>
  35 void system_executor::dispatch(
  36     BOOST_ASIO_MOVE_ARG(Function) f, const Allocator&) const
  37 {
  38   typename decay<Function>::type tmp(BOOST_ASIO_MOVE_CAST(Function)(f));
  39   boost_asio_handler_invoke_helpers::invoke(tmp, tmp);
  40 }
  41
  42 template <typename Function, typename Allocator>
  43 void system_executor::post(
  44     BOOST_ASIO_MOVE_ARG(Function) f, const Allocator& a) const
  45 {
  46   typedef typename decay<Function>::type function_type;
  47
  48   system_context& ctx = detail::global<system_context>();
  49
  50   // Allocate and construct an operation to wrap the function.
  51   typedef detail::executor_op<function_type, Allocator> op;
  52   typename op::ptr p = { detail::addressof(a), op::ptr::allocate(a), 0 };
  53   p.p = new (p.v) op(BOOST_ASIO_MOVE_CAST(Function)(f), a);
  54
  55   BOOST_ASIO_HANDLER_CREATION((ctx, *p.p,
  56         "system_executor", &this->context(), 0, "post"));
  57
  58   ctx.scheduler_.post_immediate_completion(p.p, false);
  59   p.v = p.p = 0;
  60 }
  61
  62 template <typename Function, typename Allocator>
  63 void system_executor::defer(
  64     BOOST_ASIO_MOVE_ARG(Function) f, const Allocator& a) const
  65 {
  66   typedef typename decay<Function>::type function_type;
  67
  68   system_context& ctx = detail::global<system_context>();
  69
  70   // Allocate and construct an operation to wrap the function.
  71   typedef detail::executor_op<function_type, Allocator> op;
  72   typename op::ptr p = { detail::addressof(a), op::ptr::allocate(a), 0 };
  73   p.p = new (p.v) op(BOOST_ASIO_MOVE_CAST(Function)(f), a);
  74
  75   BOOST_ASIO_HANDLER_CREATION((ctx, *p.p,
  76         "system_executor", &this->context(), 0, "defer"));
  77
  78   ctx.scheduler_.post_immediate_completion(p.p, true);
  79   p.v = p.p = 0;
  80 }
  81
  82 } // namespace asio
  83 } // namespace boost
  84
  85 #include <boost/asio/detail/pop_options.hpp>
  86
  87 #endif // BOOST_ASIO_IMPL_SYSTEM_EXECUTOR_HPP