66 lines
2.1 KiB
C++
Executable File
66 lines
2.1 KiB
C++
Executable File
/*
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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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*
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* Copyright (c) 2021 Andrey Semashev
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*/
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/*!
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* \file atomic/detail/wait_on_address.hpp
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*
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* This header contains declaration of runtime detection of \c WaitOnAddress and related APIs on Windows.
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*/
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#ifndef BOOST_ATOMIC_DETAIL_WAIT_ON_ADDRESS_HPP_INCLUDED_
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#define BOOST_ATOMIC_DETAIL_WAIT_ON_ADDRESS_HPP_INCLUDED_
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#include <boost/atomic/detail/config.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/memory_order.hpp>
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#include <boost/winapi/basic_types.hpp>
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#include <boost/atomic/detail/link.hpp>
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#include <boost/atomic/detail/once_flag.hpp>
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#include <boost/atomic/detail/header.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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namespace boost {
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namespace atomics {
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namespace detail {
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typedef boost::winapi::BOOL_ BOOST_WINAPI_WINAPI_CC
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wait_on_address_t(
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volatile boost::winapi::VOID_* addr,
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boost::winapi::PVOID_ compare_addr,
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boost::winapi::SIZE_T_ size,
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boost::winapi::DWORD_ timeout_ms);
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typedef boost::winapi::VOID_ BOOST_WINAPI_WINAPI_CC
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wake_by_address_t(boost::winapi::PVOID_ addr);
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extern BOOST_ATOMIC_DECL wait_on_address_t* wait_on_address;
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extern BOOST_ATOMIC_DECL wake_by_address_t* wake_by_address_single;
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extern BOOST_ATOMIC_DECL wake_by_address_t* wake_by_address_all;
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extern BOOST_ATOMIC_DECL once_flag wait_functions_once_flag;
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BOOST_ATOMIC_DECL void initialize_wait_functions() BOOST_NOEXCEPT;
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BOOST_FORCEINLINE void ensure_wait_functions_initialized() BOOST_NOEXCEPT
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{
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BOOST_STATIC_ASSERT_MSG(once_flag_operations::is_always_lock_free, "Boost.Atomic unsupported target platform: native atomic operations not implemented for bytes");
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if (BOOST_LIKELY(once_flag_operations::load(wait_functions_once_flag.m_flag, boost::memory_order_acquire) == 0u))
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return;
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initialize_wait_functions();
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}
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} // namespace detail
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} // namespace atomics
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} // namespace boost
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#include <boost/atomic/detail/footer.hpp>
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#endif // BOOST_ATOMIC_DETAIL_WAIT_ON_ADDRESS_HPP_INCLUDED_
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