整理

include/boost/atomic/detail/wait_caps_freebsd_umtx.hpp

@@ -0,0 +1,40 @@
+/*
+ * 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)
+ *
+ * Copyright (c) 2020 Andrey Semashev
+ */
+/*!
+ * \file   atomic/detail/wait_caps_freebsd_umtx.hpp
+ *
+ * This header defines waiting/notifying operations capabilities macros.
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_
+
+#include <sys/umtx.h>
+#include <boost/atomic/detail/config.hpp>
+#include <boost/atomic/detail/int_sizes.hpp>
+#include <boost/atomic/detail/capabilities.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+// FreeBSD _umtx_op uses physical address to the atomic object as a key, which means it should support address-free operations.
+// https://www.freebsd.org/cgi/man.cgi?query=_umtx_op&apropos=0&sektion=2&manpath=FreeBSD+11-current&format=html
+
+#if (defined(UMTX_OP_WAIT_UINT) && BOOST_ATOMIC_DETAIL_SIZEOF_INT == 4) ||\
+    (defined(UMTX_OP_WAIT) && BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 4)
+#define BOOST_ATOMIC_HAS_NATIVE_INT32_WAIT_NOTIFY BOOST_ATOMIC_INT32_LOCK_FREE
+#define BOOST_ATOMIC_HAS_NATIVE_INT32_IPC_WAIT_NOTIFY BOOST_ATOMIC_INT32_LOCK_FREE
+#endif
+
+#if defined(UMTX_OP_WAIT) && BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 8
+#define BOOST_ATOMIC_HAS_NATIVE_INT64_WAIT_NOTIFY BOOST_ATOMIC_INT64_LOCK_FREE
+#define BOOST_ATOMIC_HAS_NATIVE_INT64_IPC_WAIT_NOTIFY BOOST_ATOMIC_INT64_LOCK_FREE
+#endif
+
+#endif // BOOST_ATOMIC_DETAIL_WAIT_CAPS_FREEBSD_UMTX_HPP_INCLUDED_