asio/detail/win_static_mutex.hpp

0001 //
0002 // detail/win_static_mutex.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_WIN_STATIC_MUTEX_HPP
0012 #define BOOST_ASIO_DETAIL_WIN_STATIC_MUTEX_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
0020 #if defined(BOOST_ASIO_WINDOWS)
0021
0022 #include <boost/asio/detail/scoped_lock.hpp>
0023
0024 #include <boost/asio/detail/push_options.hpp>
0025
0026 namespace boost {
0027 namespace asio {
0028 namespace detail {
0029
0030 struct win_static_mutex
0031 {
0032   typedef boost::asio::detail::scoped_lock<win_static_mutex> scoped_lock;
0033
0034   // Initialise the mutex.
0035   BOOST_ASIO_DECL void init();
0036
0037   // Initialisation must be performed in a separate function to the "public"
0038   // init() function since the compiler does not support the use of structured
0039   // exceptions and C++ exceptions in the same function.
0040   BOOST_ASIO_DECL int do_init();
0041
0042   // Lock the mutex.
0043   void lock()
0044   {
0045     ::EnterCriticalSection(&crit_section_);
0046   }
0047
0048   // Unlock the mutex.
0049   void unlock()
0050   {
0051     ::LeaveCriticalSection(&crit_section_);
0052   }
0053
0054   bool initialised_;
0055   ::CRITICAL_SECTION crit_section_;
0056 };
0057
0058 #if defined(UNDER_CE)
0059 # define BOOST_ASIO_WIN_STATIC_MUTEX_INIT { false, { 0, 0, 0, 0, 0 } }
0060 #else // defined(UNDER_CE)
0061 # define BOOST_ASIO_WIN_STATIC_MUTEX_INIT { false, { 0, 0, 0, 0, 0, 0 } }
0062 #endif // defined(UNDER_CE)
0063
0064 } // namespace detail
0065 } // namespace asio
0066 } // namespace boost
0067
0068 #include <boost/asio/detail/pop_options.hpp>
0069
0070 #if defined(BOOST_ASIO_HEADER_ONLY)
0071 # include <boost/asio/detail/impl/win_static_mutex.ipp>
0072 #endif // defined(BOOST_ASIO_HEADER_ONLY)
0073
0074 #endif // defined(BOOST_ASIO_WINDOWS)
0075
0076 #endif // BOOST_ASIO_DETAIL_WIN_STATIC_MUTEX_HPP