ceph/src/boost/boost/process/detail/posix/async_handler.hpp

   1 // Copyright (c) 2016 Klemens D. Morgenstern
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6
   7 #ifndef BOOST_PROCESS_POSIX_ASYNC_HANDLER_HPP_
   8 #define BOOST_PROCESS_POSIX_ASYNC_HANDLER_HPP_
   9
  10 #include <boost/process/detail/posix/handler.hpp>
  11 #include <type_traits>
  12
  13 namespace boost { namespace process { namespace detail { namespace posix {
  14
  15 struct require_io_context {};
  16
  17 struct async_handler : handler_base_ext, require_io_context
  18 {
  19 };
  20
  21 template<typename T>
  22 struct is_async_handler :  std::is_base_of<async_handler, T> {};
  23 template<typename T>
  24 struct is_async_handler<T&> :  std::is_base_of<async_handler, T> {};
  25 template<typename T>
  26 struct is_async_handler<const T&> :  std::is_base_of<async_handler, T> {};
  27
  28 template<typename T>
  29 struct does_require_io_context : std::is_base_of<require_io_context, T> {};
  30
  31 template<typename T>
  32 struct does_require_io_context<T&> : std::is_base_of<require_io_context, T> {};
  33
  34 template<typename T>
  35 struct does_require_io_context<const T&> : std::is_base_of<require_io_context, T> {};
  36
  37
  38 }}}}
  39
  40 #endif /* BOOST_PROCESS_WINDOWS_ASYNC_HANDLER_HPP_ */