// // detail/null_mutex.hpp // ~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com) // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #ifndef BOOST_ASIO_DETAIL_NULL_MUTEX_HPP #define BOOST_ASIO_DETAIL_NULL_MUTEX_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include <boost/asio/detail/config.hpp> #if !defined(BOOST_HAS_THREADS) || defined(BOOST_ASIO_DISABLE_THREADS) #include <boost/asio/detail/noncopyable.hpp> #include <boost/asio/detail/scoped_lock.hpp> #include <boost/asio/detail/push_options.hpp> namespace boost { namespace asio { namespace detail { class null_mutex : private noncopyable { public: typedef boost::asio::detail::scoped_lock<null_mutex> scoped_lock; // Constructor. null_mutex() { } // Destructor. ~null_mutex() { } // Lock the mutex. void lock() { } // Unlock the mutex. void unlock() { } }; } // namespace detail } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #endif // !defined(BOOST_HAS_THREADS) || defined(BOOST_ASIO_DISABLE_THREADS) #endif // BOOST_ASIO_DETAIL_NULL_MUTEX_HPP