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