asio/detail/std_thread.hpp

0001 //
0002 // detail/std_thread.hpp
0003 // ~~~~~~~~~~~~~~~~~~~~~
0004 //
0005 // Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009 //
0010
0011 #ifndef BOOST_ASIO_DETAIL_STD_THREAD_HPP
0012 #define BOOST_ASIO_DETAIL_STD_THREAD_HPP
0013
0014 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
0015 # pragma once
0016 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
0017
0018 #include <boost/asio/detail/config.hpp>
0019 #include <thread>
0020 #include <boost/asio/detail/noncopyable.hpp>
0021
0022 #include <boost/asio/detail/push_options.hpp>
0023
0024 namespace boost {
0025 namespace asio {
0026 namespace detail {
0027
0028 class std_thread
0029   : private noncopyable
0030 {
0031 public:
0032   // Constructor.
0033   template <typename Function>
0034   std_thread(Function f, unsigned int = 0)
0035     : thread_(f)
0036   {
0037   }
0038
0039   // Destructor.
0040   ~std_thread()
0041   {
0042     join();
0043   }
0044
0045   // Wait for the thread to exit.
0046   void join()
0047   {
0048     if (thread_.joinable())
0049       thread_.join();
0050   }
0051
0052   // Get number of CPUs.
0053   static std::size_t hardware_concurrency()
0054   {
0055     return std::thread::hardware_concurrency();
0056   }
0057
0058 private:
0059   std::thread thread_;
0060 };
0061
0062 } // namespace detail
0063 } // namespace asio
0064 } // namespace boost
0065
0066 #include <boost/asio/detail/pop_options.hpp>
0067
0068 #endif // BOOST_ASIO_DETAIL_STD_THREAD_HPP