atomic/detail/wait_caps_freebsd_umtx.hpp

0001 /*
0002  * Distributed under the Boost Software License, Version 1.0.
0003  * (See accompanying file LICENSE_1_0.txt or copy at
0004  * http://www.boost.org/LICENSE_1_0.txt)
0005  *
0006  * Copyright (c) 2020 Andrey Semashev
0007  */
0008 /*!
0009  * \file   atomic/detail/wait_caps_freebsd_umtx.hpp
0010  *
0011  * This header defines waiting/notifying operations capabilities macros.
0012  */
0013
0014 #ifndef BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_
0015 #define BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_
0016
0017 #include <sys/umtx.h>
0018 #include <boost/atomic/detail/config.hpp>
0019 #include <boost/atomic/detail/int_sizes.hpp>
0020 #include <boost/atomic/detail/capabilities.hpp>
0021
0022 #ifdef BOOST_HAS_PRAGMA_ONCE
0023 #pragma once
0024 #endif
0025
0026 // FreeBSD _umtx_op uses physical address to the atomic object as a key, which means it should support address-free operations.
0027 // https://www.freebsd.org/cgi/man.cgi?query=_umtx_op&apropos=0&sektion=2&manpath=FreeBSD+11-current&format=html
0028
0029 #if (defined(UMTX_OP_WAIT_UINT) && BOOST_ATOMIC_DETAIL_SIZEOF_INT == 4) ||\
0030     (defined(UMTX_OP_WAIT) && BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 4)
0031 #define BOOST_ATOMIC_HAS_NATIVE_INT32_WAIT_NOTIFY BOOST_ATOMIC_INT32_LOCK_FREE
0032 #define BOOST_ATOMIC_HAS_NATIVE_INT32_IPC_WAIT_NOTIFY BOOST_ATOMIC_INT32_LOCK_FREE
0033 #endif
0034
0035 #if defined(UMTX_OP_WAIT) && BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 8
0036 #define BOOST_ATOMIC_HAS_NATIVE_INT64_WAIT_NOTIFY BOOST_ATOMIC_INT64_LOCK_FREE
0037 #define BOOST_ATOMIC_HAS_NATIVE_INT64_IPC_WAIT_NOTIFY BOOST_ATOMIC_INT64_LOCK_FREE
0038 #endif
0039
0040 #endif // BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_