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

   1 //
   2 // detail/null_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_MUTEX_HPP
  12 #define BOOST_ASIO_DETAIL_NULL_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/noncopyable.hpp>
  23 #include <boost/asio/detail/scoped_lock.hpp>
  24
  25 #include <boost/asio/detail/push_options.hpp>
  26
  27 namespace boost {
  28 namespace asio {
  29 namespace detail {
  30
  31 class null_mutex
  32   : private noncopyable
  33 {
  34 public:
  35   typedef boost::asio::detail::scoped_lock<null_mutex> scoped_lock;
  36
  37   // Constructor.
  38   null_mutex()
  39   {
  40   }
  41
  42   // Destructor.
  43   ~null_mutex()
  44   {
  45   }
  46
  47   // Lock the mutex.
  48   void lock()
  49   {
  50   }
  51
  52   // Unlock the mutex.
  53   void unlock()
  54   {
  55   }
  56 };
  57
  58 } // namespace detail
  59 } // namespace asio
  60 } // namespace boost
  61
  62 #include <boost/asio/detail/pop_options.hpp>
  63
  64 #endif // !defined(BOOST_ASIO_HAS_THREADS)
  65
  66 #endif // BOOST_ASIO_DETAIL_NULL_MUTEX_HPP