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The inter-process atomics have ipc_ prefixes: ipc_atomic, ipc_atomic_ref and ipc_atomic_flag. These types are similar to their unprefixed counterparts with the following distinctions: - The operations are provided with an added precondition that is_lock_free() returns true. - All operations, including waiting/notifying operations, are address-free, so the types are suitable for inter-process communication. - The new has_native_wait_notify() operation and always_has_native_wait_notify static constant allow to test if the target platform has native support for address-free waiting/notifying operations. If it does not, a generic implementation is used based on a busy wait. - The new set of capability macros added. The macros are named BOOST_ATOMIC_HAS_NATIVE_<T>_IPC_WAIT_NOTIFY and indicate whether address-free waiting/notifying operations are supported natively for a given type. Additionally, to unify interface and implementation of different components, the has_native_wait_notify() operation and always_has_native_wait_notify static constant were added to non-IPC atomic types as well. Added BOOST_ATOMIC_HAS_NATIVE_<T>_WAIT_NOTIFY capability macros to indicate native support for inter-thread waiting/notifying operations. Also, added is_lock_free() and is_always_lock_free to atomic_flag. This commit adds implementation, docs and tests.
28 lines
754 B
C++
28 lines
754 B
C++
#ifndef BOOST_ATOMIC_HPP
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#define BOOST_ATOMIC_HPP
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// Copyright (c) 2011 Helge Bahmann
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// Copyright (c) 2020 Andrey Semashev
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//
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// Distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// This header includes all Boost.Atomic public headers
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#include <boost/memory_order.hpp>
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#include <boost/atomic/capabilities.hpp>
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#include <boost/atomic/atomic.hpp>
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#include <boost/atomic/atomic_ref.hpp>
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#include <boost/atomic/atomic_flag.hpp>
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#include <boost/atomic/ipc_atomic.hpp>
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#include <boost/atomic/ipc_atomic_ref.hpp>
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#include <boost/atomic/ipc_atomic_flag.hpp>
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#include <boost/atomic/fences.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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#endif
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