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- //
- // detail/null_thread.hpp
- // ~~~~~~~~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
-
- #ifndef ASIO_DETAIL_NULL_THREAD_HPP
- #define ASIO_DETAIL_NULL_THREAD_HPP
-
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
- #include "asio/detail/config.hpp"
-
- #if !defined(ASIO_HAS_THREADS)
-
- #include "asio/detail/noncopyable.hpp"
- #include "asio/detail/throw_error.hpp"
- #include "asio/error.hpp"
-
- #include "asio/detail/push_options.hpp"
-
- namespace asio {
- namespace detail {
-
- class null_thread
- : private noncopyable
- {
- public:
- // Constructor.
- template <typename Function>
- null_thread(Function, unsigned int = 0)
- {
- asio::detail::throw_error(
- asio::error::operation_not_supported, "thread");
- }
-
- // Destructor.
- ~null_thread()
- {
- }
-
- // Wait for the thread to exit.
- void join()
- {
- }
-
- // Get number of CPUs.
- static std::size_t hardware_concurrency()
- {
- return 1;
- }
- };
-
- } // namespace detail
- } // namespace asio
-
- #include "asio/detail/pop_options.hpp"
-
- #endif // !defined(ASIO_HAS_THREADS)
-
- #endif // ASIO_DETAIL_NULL_THREAD_HPP
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