68 lines
1.3 KiB
C++
68 lines
1.3 KiB
C++
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//
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// detail/null_thread.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_NULL_THREAD_HPP
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#define ASIO_DETAIL_NULL_THREAD_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if !defined(ASIO_HAS_THREADS)
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#include "asio/detail/noncopyable.hpp"
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#include "asio/detail/throw_error.hpp"
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#include "asio/error.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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class null_thread
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: private noncopyable
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{
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public:
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// Constructor.
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template <typename Function>
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null_thread(Function, unsigned int = 0)
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{
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asio::detail::throw_error(
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asio::error::operation_not_supported, "thread");
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}
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// Destructor.
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~null_thread()
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{
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}
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// Wait for the thread to exit.
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void join()
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{
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}
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// Get number of CPUs.
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static std::size_t hardware_concurrency()
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{
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return 1;
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}
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};
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} // namespace detail
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // !defined(ASIO_HAS_THREADS)
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#endif // ASIO_DETAIL_NULL_THREAD_HPP
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