ceph/src/boost/libs/asio/include/boost/asio/detail/impl/win_mutex.ipp

   1 //
   2 // detail/impl/win_mutex.ipp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_DETAIL_IMPL_WIN_MUTEX_IPP
  12 #define BOOST_ASIO_DETAIL_IMPL_WIN_MUTEX_IPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if defined(BOOST_ASIO_WINDOWS)
  21
  22 #include <boost/asio/detail/throw_error.hpp>
  23 #include <boost/asio/detail/win_mutex.hpp>
  24 #include <boost/asio/error.hpp>
  25
  26 #include <boost/asio/detail/push_options.hpp>
  27
  28 namespace boost {
  29 namespace asio {
  30 namespace detail {
  31
  32 win_mutex::win_mutex()
  33 {
  34   int error = do_init();
  35   boost::system::error_code ec(error,
  36       boost::asio::error::get_system_category());
  37   boost::asio::detail::throw_error(ec, "mutex");
  38 }
  39
  40 int win_mutex::do_init()
  41 {
  42 #if defined(__MINGW32__)
  43   // Not sure if MinGW supports structured exception handling, so for now
  44   // we'll just call the Windows API and hope.
  45 # if defined(UNDER_CE)
  46   ::InitializeCriticalSection(&crit_section_);
  47 # elif defined(BOOST_ASIO_WINDOWS_APP)
  48   ::InitializeCriticalSectionEx(&crit_section_, 0x80000000, 0);
  49 # else
  50   if (!::InitializeCriticalSectionAndSpinCount(&crit_section_, 0x80000000))
  51     return ::GetLastError();
  52 # endif
  53   return 0;
  54 #else
  55   __try
  56   {
  57 # if defined(UNDER_CE)
  58     ::InitializeCriticalSection(&crit_section_);
  59 # elif defined(BOOST_ASIO_WINDOWS_APP)
  60     if (!::InitializeCriticalSectionEx(&crit_section_, 0, 0))
  61           return ::GetLastError();
  62 # else
  63     if (!::InitializeCriticalSectionAndSpinCount(&crit_section_, 0x80000000))
  64       return ::GetLastError();
  65 # endif
  66   }
  67   __except(GetExceptionCode() == STATUS_NO_MEMORY
  68       ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH)
  69   {
  70     return ERROR_OUTOFMEMORY;
  71   }
  72
  73   return 0;
  74 #endif
  75 }
  76
  77 } // namespace detail
  78 } // namespace asio
  79 } // namespace boost
  80
  81 #include <boost/asio/detail/pop_options.hpp>
  82
  83 #endif // defined(BOOST_ASIO_WINDOWS)
  84
  85 #endif // BOOST_ASIO_DETAIL_IMPL_WIN_MUTEX_IPP