2 // detail/null_event.hpp
3 // ~~~~~~~~~~~~~~~~~~~~~
5 // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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)
11 #ifndef BOOST_ASIO_DETAIL_NULL_EVENT_HPP
12 #define BOOST_ASIO_DETAIL_NULL_EVENT_HPP
14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
18 #include <boost/asio/detail/config.hpp>
20 #if !defined(BOOST_ASIO_HAS_THREADS)
22 #include <boost/asio/detail/noncopyable.hpp>
24 #include <boost/asio/detail/push_options.hpp>
44 // Signal the event. (Retained for backward compatibility.)
45 template <typename Lock>
50 // Signal all waiters.
51 template <typename Lock>
52 void signal_all(Lock&)
56 // Unlock the mutex and signal one waiter.
57 template <typename Lock>
58 void unlock_and_signal_one(Lock&)
62 // If there's a waiter, unlock the mutex and signal it.
63 template <typename Lock>
64 bool maybe_unlock_and_signal_one(Lock&)
70 template <typename Lock>
75 // Wait for the event to become signalled.
76 template <typename Lock>
86 #include <boost/asio/detail/pop_options.hpp>
88 #endif // !defined(BOOST_ASIO_HAS_THREADS)
90 #endif // BOOST_ASIO_DETAIL_NULL_EVENT_HPP