52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
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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) 2025 Andrey Semashev
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*/
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/*!
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* \file atomic/has_posix_clock_traits.hpp
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*
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* This header contains utilities for working with \c posix_clock_traits.
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*/
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#ifndef BOOST_ATOMIC_DETAIL_HAS_POSIX_CLOCK_TRAITS_HPP_INCLUDED_
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#define BOOST_ATOMIC_DETAIL_HAS_POSIX_CLOCK_TRAITS_HPP_INCLUDED_
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#include <sys/types.h> // clockid_t
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#include <type_traits>
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#include <boost/atomic/posix_clock_traits_fwd.hpp>
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#include <boost/atomic/detail/config.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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template< typename Clock >
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struct has_posix_clock_traits_impl
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{
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template< typename T, clockid_t = posix_clock_traits< T >::clock_id >
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static std::true_type check_posix_clock_traits_clock_id(T*);
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static std::false_type check_posix_clock_traits_clock_id(...);
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using type = decltype(has_posix_clock_traits_impl< Clock >::check_posix_clock_traits_clock_id(static_cast< Clock* >(nullptr)));
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};
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//! Checks if there exists a specialization of \c posix_clock_traits for \c Clock
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template< typename Clock >
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using has_posix_clock_traits = typename has_posix_clock_traits_impl< Clock >::type;
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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_HAS_POSIX_CLOCK_TRAITS_HPP_INCLUDED_
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