ceph/src/boost/boost/atomic/detail/wait_caps_freebsd_umtx.hpp

   1 /*
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * Copyright (c) 2020 Andrey Semashev
   7  */
   8 /*!
   9  * \file   atomic/detail/wait_caps_freebsd_umtx.hpp
  10  *
  11  * This header defines waiting/notifying operations capabilities macros.
  12  */
  13
  14 #ifndef BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_
  15 #define BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_
  16
  17 #include <sys/umtx.h>
  18 #include <boost/atomic/detail/config.hpp>
  19 #include <boost/atomic/detail/int_sizes.hpp>
  20 #include <boost/atomic/detail/capabilities.hpp>
  21
  22 #ifdef BOOST_HAS_PRAGMA_ONCE
  23 #pragma once
  24 #endif
  25
  26 // FreeBSD _umtx_op uses physical address to the atomic object as a key, which means it should support address-free operations.
  27 // https://www.freebsd.org/cgi/man.cgi?query=_umtx_op&apropos=0&sektion=2&manpath=FreeBSD+11-current&format=html
  28
  29 #if (defined(UMTX_OP_WAIT_UINT) && BOOST_ATOMIC_DETAIL_SIZEOF_INT == 4) ||\
  30     (defined(UMTX_OP_WAIT) && BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 4)
  31 #define BOOST_ATOMIC_HAS_NATIVE_INT32_WAIT_NOTIFY BOOST_ATOMIC_INT32_LOCK_FREE
  32 #define BOOST_ATOMIC_HAS_NATIVE_INT32_IPC_WAIT_NOTIFY BOOST_ATOMIC_INT32_LOCK_FREE
  33 #endif
  34
  35 #if defined(UMTX_OP_WAIT) && BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 8
  36 #define BOOST_ATOMIC_HAS_NATIVE_INT64_WAIT_NOTIFY BOOST_ATOMIC_INT64_LOCK_FREE
  37 #define BOOST_ATOMIC_HAS_NATIVE_INT64_IPC_WAIT_NOTIFY BOOST_ATOMIC_INT64_LOCK_FREE
  38 #endif
  39
  40 #endif // BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_