ceph/src/boost/libs/asio/include/boost/asio/detail/null_static_mutex.hpp

   1 //
   2 // detail/null_static_mutex.hpp
   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_NULL_STATIC_MUTEX_HPP
  12 #define BOOST_ASIO_DETAIL_NULL_STATIC_MUTEX_HPP
  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_HAS_THREADS)
  21
  22 #include <boost/asio/detail/scoped_lock.hpp>
  23
  24 #include <boost/asio/detail/push_options.hpp>
  25
  26 namespace boost {
  27 namespace asio {
  28 namespace detail {
  29
  30 struct null_static_mutex
  31 {
  32   typedef boost::asio::detail::scoped_lock<null_static_mutex> scoped_lock;
  33
  34   // Initialise the mutex.
  35   void init()
  36   {
  37   }
  38
  39   // Lock the mutex.
  40   void lock()
  41   {
  42   }
  43
  44   // Unlock the mutex.
  45   void unlock()
  46   {
  47   }
  48
  49   int unused_;
  50 };
  51
  52 #define BOOST_ASIO_NULL_STATIC_MUTEX_INIT { 0 }
  53
  54 } // namespace detail
  55 } // namespace asio
  56 } // namespace boost
  57
  58 #include <boost/asio/detail/pop_options.hpp>
  59
  60 #endif // !defined(BOOST_ASIO_HAS_THREADS)
  61
  62 #endif // BOOST_ASIO_DETAIL_NULL_STATIC_MUTEX_HPP