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d361e123c6
c27aa31f0 Updated Boost to v1.70.0 including iterator range math numeric crc circular_buffer multi_index intrusive git-subtree-dir: boost git-subtree-split: c27aa31f06ebf1a91b3fa3ae9df9b5efdf14ec9f
90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
// Copyright 2018 Glen Joseph Fernandes
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// (glenjofe@gmail.com)
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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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#ifndef BOOST_CIRCULAR_BUFFER_ALLOCATORS_HPP
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#define BOOST_CIRCULAR_BUFFER_ALLOCATORS_HPP
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#include <boost/config.hpp>
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#if defined(BOOST_NO_CXX11_ALLOCATOR)
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#define BOOST_CB_NO_CXX11_ALLOCATOR
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#elif defined(BOOST_LIBSTDCXX_VERSION) && (BOOST_LIBSTDCXX_VERSION < 40800)
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#define BOOST_CB_NO_CXX11_ALLOCATOR
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#endif
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#include <limits>
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#if !defined(BOOST_CB_NO_CXX11_ALLOCATOR)
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#include <memory>
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#else
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#include <new>
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#endif
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
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#include <utility>
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#endif
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namespace boost {
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namespace cb_details {
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#if !defined(BOOST_CB_NO_CXX11_ALLOCATOR)
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template<class A>
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struct allocator_traits
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: std::allocator_traits<A> {
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using typename std::allocator_traits<A>::value_type;
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using typename std::allocator_traits<A>::size_type;
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static size_type max_size(const A&) BOOST_NOEXCEPT {
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return (std::numeric_limits<size_type>::max)() / sizeof(value_type);
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}
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};
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#else
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template<class A>
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struct allocator_traits {
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typedef typename A::value_type value_type;
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typedef typename A::pointer pointer;
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typedef typename A::const_pointer const_pointer;
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typedef typename A::difference_type difference_type;
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typedef typename A::size_type size_type;
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static size_type max_size(const A&) BOOST_NOEXCEPT {
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return (std::numeric_limits<size_type>::max)() / sizeof(value_type);
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}
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
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#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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template<class U, class... Args>
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static void construct(const A&, U* ptr, Args&&... args) {
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::new((void*)ptr) U(std::forward<Args>(args)...);
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}
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#else
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template<class U, class V>
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static void construct(const A&, U* ptr, V&& value) {
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::new((void*)ptr) U(std::forward<V>(value));
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}
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#endif
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#else
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template<class U, class V>
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static void construct(const A&, U* ptr, const V& value) {
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::new((void*)ptr) U(value);
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}
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template<class U, class V>
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static void construct(const A&, U* ptr, V& value) {
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::new((void*)ptr) U(value);
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}
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#endif
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template<class U>
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static void destroy(const A&, U* ptr) {
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(void)ptr;
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ptr->~U();
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}
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};
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#endif
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} // cb_details
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} // boost
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#endif
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