1 // 2 // detail/null_thread.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2015 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_NULL_THREAD_HPP 12 #define BOOST_ASIO_DETAIL_NULL_THREAD_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 20 #if !defined(BOOST_ASIO_HAS_THREADS) 21 22 #include <boost/asio/detail/noncopyable.hpp> 23 #include <boost/asio/detail/throw_error.hpp> 24 #include <boost/asio/error.hpp> 25 26 #include <boost/asio/detail/push_options.hpp> 27 28 namespace boost { 29 namespace asio { 30 namespace detail { 31 32 class null_thread 33 : private noncopyable 34 { 35 public: 36 // Constructor. 37 template <typename Function> null_thread(Function,unsigned int=0)38 null_thread(Function, unsigned int = 0) 39 { 40 boost::asio::detail::throw_error( 41 boost::asio::error::operation_not_supported, "thread"); 42 } 43 44 // Destructor. ~null_thread()45 ~null_thread() 46 { 47 } 48 49 // Wait for the thread to exit. join()50 void join() 51 { 52 } 53 }; 54 55 } // namespace detail 56 } // namespace asio 57 } // namespace boost 58 59 #include <boost/asio/detail/pop_options.hpp> 60 61 #endif // !defined(BOOST_ASIO_HAS_THREADS) 62 63 #endif // BOOST_ASIO_DETAIL_NULL_THREAD_HPP 64