ceph/src/boost/libs/log/include/boost/log/detail/fake_mutex.hpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   fake_mutex.hpp
   9  * \author Andrey Semashev
  10  * \date   31.07.2011
  11  *
  12  * \brief  This header is the Boost.Log library implementation, see the library documentation
  13  *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
  14  */
  15
  16 #ifndef BOOST_LOG_DETAIL_FAKE_MUTEX_HPP_INCLUDED_
  17 #define BOOST_LOG_DETAIL_FAKE_MUTEX_HPP_INCLUDED_
  18
  19 #include <boost/log/detail/config.hpp>
  20 #include <boost/log/detail/header.hpp>
  21
  22 #ifdef BOOST_HAS_PRAGMA_ONCE
  23 #pragma once
  24 #endif
  25
  26 namespace boost {
  27
  28 BOOST_LOG_OPEN_NAMESPACE
  29
  30 namespace aux {
  31
  32 //! Fake mutex that doesn't do anything. Note: we're not using \c null_mutex from Boost.Thread in order not to introduce false dependencies on Boost.Thread and Boost.Chrono.
  33 class fake_mutex
  34 {
  35 public:
  36     BOOST_DEFAULTED_FUNCTION(fake_mutex(), {})
  37     void lock() {}
  38     bool try_lock() { return true; }
  39     template< typename T >
  40     bool timed_lock(T const&) { return true; }
  41     void unlock() {}
  42
  43     // Copying prohibited
  44     BOOST_DELETED_FUNCTION(fake_mutex(fake_mutex const&))
  45     BOOST_DELETED_FUNCTION(fake_mutex& operator=(fake_mutex const&))
  46 };
  47
  48 } // namespace aux
  49
  50 BOOST_LOG_CLOSE_NAMESPACE // namespace log
  51
  52 } // namespace boost
  53
  54 #include <boost/log/detail/footer.hpp>
  55
  56 #endif // BOOST_LOG_DETAIL_FAKE_MUTEX_HPP_INCLUDED_