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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.
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
// 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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#include <boost/atomic/ipc_atomic.hpp>
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#include <boost/atomic/ipc_atomic_flag.hpp>
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#include <boost/atomic/capabilities.hpp>
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#include <boost/config.hpp>
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#include <boost/cstdint.hpp>
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#include "ipc_wait_test_helpers.hpp"
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int main(int, char *[])
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{
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#if BOOST_ATOMIC_FLAG_LOCK_FREE == 2
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test_flag_wait_notify_api();
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#endif
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#if BOOST_ATOMIC_INT8_LOCK_FREE == 2
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test_wait_notify_api< ipc_atomic_wrapper, boost::uint8_t >(1, 2, 3);
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#endif
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#if BOOST_ATOMIC_INT16_LOCK_FREE == 2
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test_wait_notify_api< ipc_atomic_wrapper, boost::uint16_t >(1, 2, 3);
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#endif
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#if BOOST_ATOMIC_INT32_LOCK_FREE == 2
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test_wait_notify_api< ipc_atomic_wrapper, boost::uint32_t >(1, 2, 3);
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#endif
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#if BOOST_ATOMIC_INT64_LOCK_FREE == 2
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test_wait_notify_api< ipc_atomic_wrapper, boost::uint64_t >(1, 2, 3);
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#endif
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#if defined(BOOST_HAS_INT128) && !defined(BOOST_ATOMIC_TESTS_NO_INT128) && BOOST_ATOMIC_INT128_LOCK_FREE == 2
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test_wait_notify_api< ipc_atomic_wrapper, boost::uint128_type >(1, 2, 3);
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#endif
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return boost::report_errors();
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}
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