log/detail/fake_mutex.hpp

0001 /*
0002  *          Copyright Andrey Semashev 2007 - 2015.
0003  * Distributed under the Boost Software License, Version 1.0.
0004  *    (See accompanying file LICENSE_1_0.txt or copy at
0005  *          http://www.boost.org/LICENSE_1_0.txt)
0006  */
0007 /*!
0008  * \file   fake_mutex.hpp
0009  * \author Andrey Semashev
0010  * \date   31.07.2011
0011  *
0012  * \brief  This header is the Boost.Log library implementation, see the library documentation
0013  *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
0014  */
0015
0016 #ifndef BOOST_LOG_DETAIL_FAKE_MUTEX_HPP_INCLUDED_
0017 #define BOOST_LOG_DETAIL_FAKE_MUTEX_HPP_INCLUDED_
0018
0019 #include <boost/log/detail/config.hpp>
0020 #include <boost/log/detail/header.hpp>
0021
0022 #ifdef BOOST_HAS_PRAGMA_ONCE
0023 #pragma once
0024 #endif
0025
0026 namespace boost {
0027
0028 BOOST_LOG_OPEN_NAMESPACE
0029
0030 namespace aux {
0031
0032 //! 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.
0033 class fake_mutex
0034 {
0035 public:
0036     BOOST_DEFAULTED_FUNCTION(fake_mutex(), {})
0037     void lock() {}
0038     bool try_lock() { return true; }
0039     template< typename T >
0040     bool timed_lock(T const&) { return true; }
0041     void unlock() {}
0042
0043     // Copying prohibited
0044     BOOST_DELETED_FUNCTION(fake_mutex(fake_mutex const&))
0045     BOOST_DELETED_FUNCTION(fake_mutex& operator=(fake_mutex const&))
0046 };
0047
0048 } // namespace aux
0049
0050 BOOST_LOG_CLOSE_NAMESPACE // namespace log
0051
0052 } // namespace boost
0053
0054 #include <boost/log/detail/footer.hpp>
0055
0056 #endif // BOOST_LOG_DETAIL_FAKE_MUTEX_HPP_INCLUDED_