detail/impl/win_mutex.ipp

0001 //
0002 // detail/impl/win_mutex.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_WIN_MUTEX_IPP
0012 #define BOOST_ASIO_DETAIL_IMPL_WIN_MUTEX_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_WINDOWS)
0021
0022 #include <boost/asio/detail/throw_error.hpp>
0023 #include <boost/asio/detail/win_mutex.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 win_mutex::win_mutex()
0033 {
0034   int error = do_init();
0035   boost::system::error_code ec(error,
0036       boost::asio::error::get_system_category());
0037   boost::asio::detail::throw_error(ec, "mutex");
0038 }
0039
0040 int win_mutex::do_init()
0041 {
0042 #if defined(__MINGW32__)
0043   // Not sure if MinGW supports structured exception handling, so for now
0044   // we'll just call the Windows API and hope.
0045 # if defined(UNDER_CE)
0046   ::InitializeCriticalSection(&crit_section_);
0047 # elif defined(BOOST_ASIO_WINDOWS_APP)
0048   if (!::InitializeCriticalSectionEx(&crit_section_, 0, 0))
0049     return ::GetLastError();
0050 # else
0051   if (!::InitializeCriticalSectionAndSpinCount(&crit_section_, 0x80000000))
0052     return ::GetLastError();
0053 # endif
0054   return 0;
0055 #else
0056   __try
0057   {
0058 # if defined(UNDER_CE)
0059     ::InitializeCriticalSection(&crit_section_);
0060 # elif defined(BOOST_ASIO_WINDOWS_APP)
0061     if (!::InitializeCriticalSectionEx(&crit_section_, 0, 0))
0062       return ::GetLastError();
0063 # else
0064     if (!::InitializeCriticalSectionAndSpinCount(&crit_section_, 0x80000000))
0065       return ::GetLastError();
0066 # endif
0067   }
0068   __except(GetExceptionCode() == STATUS_NO_MEMORY
0069       ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH)
0070   {
0071     return ERROR_OUTOFMEMORY;
0072   }
0073
0074   return 0;
0075 #endif
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_WINDOWS)
0085
0086 #endif // BOOST_ASIO_DETAIL_IMPL_WIN_MUTEX_IPP