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- // Copyright 2018 Glen Joseph Fernandes
- // (glenjofe@gmail.com)
- //
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #ifndef BOOST_CIRCULAR_BUFFER_ALLOCATORS_HPP
- #define BOOST_CIRCULAR_BUFFER_ALLOCATORS_HPP
- #include <boost/config.hpp>
- #if defined(BOOST_NO_CXX11_ALLOCATOR)
- #define BOOST_CB_NO_CXX11_ALLOCATOR
- #elif defined(BOOST_LIBSTDCXX_VERSION) && (BOOST_LIBSTDCXX_VERSION < 40800)
- #define BOOST_CB_NO_CXX11_ALLOCATOR
- #endif
- #if !defined(BOOST_CB_NO_CXX11_ALLOCATOR)
- #include <memory>
- #else
- #include <new>
- #endif
- #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
- #include <utility>
- #endif
- namespace boost {
- namespace cb_details {
- #if !defined(BOOST_CB_NO_CXX11_ALLOCATOR)
- using std::allocator_traits;
- #else
- template<class A>
- struct allocator_traits {
- typedef typename A::value_type value_type;
- typedef typename A::pointer pointer;
- typedef typename A::const_pointer const_pointer;
- typedef typename A::difference_type difference_type;
- typedef typename A::size_type size_type;
- static size_type max_size(const A& a) BOOST_NOEXCEPT {
- return a.max_size();
- }
- #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
- #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
- template<class U, class... Args>
- static void construct(const A&, U* ptr, Args&&... args) {
- ::new((void*)ptr) U(std::forward<Args>(args)...);
- }
- #else
- template<class U, class V>
- static void construct(const A&, U* ptr, V&& value) {
- ::new((void*)ptr) U(std::forward<V>(value));
- }
- #endif
- #else
- template<class U, class V>
- static void construct(const A&, U* ptr, const V& value) {
- ::new((void*)ptr) U(value);
- }
- template<class U, class V>
- static void construct(const A&, U* ptr, V& value) {
- ::new((void*)ptr) U(value);
- }
- #endif
- template<class U>
- static void destroy(const A&, U* ptr) {
- (void)ptr;
- ptr->~U();
- }
- };
- #endif
- } // cb_details
- } // boost
- #endif
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