detail/impl/posix_thread.ipp

0001 //
0002 // detail/impl/posix_thread.ipp
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_IMPL_POSIX_THREAD_IPP
0012 #define BOOST_ASIO_DETAIL_IMPL_POSIX_THREAD_IPP
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
0020 #if defined(BOOST_ASIO_HAS_PTHREADS)
0021
0022 #include <boost/asio/detail/posix_thread.hpp>
0023 #include <boost/asio/detail/throw_error.hpp>
0024 #include <boost/asio/error.hpp>
0025
0026 #include <boost/asio/detail/push_options.hpp>
0027
0028 namespace boost {
0029 namespace asio {
0030 namespace detail {
0031
0032 posix_thread::~posix_thread()
0033 {
0034   if (!joined_)
0035     ::pthread_detach(thread_);
0036 }
0037
0038 void posix_thread::join()
0039 {
0040   if (!joined_)
0041   {
0042     ::pthread_join(thread_, 0);
0043     joined_ = true;
0044   }
0045 }
0046
0047 std::size_t posix_thread::hardware_concurrency()
0048 {
0049 #if defined(_SC_NPROCESSORS_ONLN)
0050   long result = sysconf(_SC_NPROCESSORS_ONLN);
0051   if (result > 0)
0052     return result;
0053 #endif // defined(_SC_NPROCESSORS_ONLN)
0054   return 0;
0055 }
0056
0057 void posix_thread::start_thread(func_base* arg)
0058 {
0059   int error = ::pthread_create(&thread_, 0,
0060         boost_asio_detail_posix_thread_function, arg);
0061   if (error != 0)
0062   {
0063     delete arg;
0064     boost::system::error_code ec(error,
0065         boost::asio::error::get_system_category());
0066     boost::asio::detail::throw_error(ec, "thread");
0067   }
0068 }
0069
0070 void* boost_asio_detail_posix_thread_function(void* arg)
0071 {
0072   posix_thread::auto_func_base_ptr func = {
0073       static_cast<posix_thread::func_base*>(arg) };
0074   func.ptr->run();
0075   return 0;
0076 }
0077
0078 } // namespace detail
0079 } // namespace asio
0080 } // namespace boost
0081
0082 #include <boost/asio/detail/pop_options.hpp>
0083
0084 #endif // defined(BOOST_ASIO_HAS_PTHREADS)
0085
0086 #endif // BOOST_ASIO_DETAIL_IMPL_POSIX_THREAD_IPP