69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
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//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2025-2025. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/container for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_CONTAINER_DETAIL_OPERATOR_NEW_HELPERS_HPP
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#define BOOST_CONTAINER_DETAIL_OPERATOR_NEW_HELPERS_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/container/detail/std_fwd.hpp>
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#include <boost/container/throw_exception.hpp>
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namespace boost {
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namespace container {
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namespace dtl {
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template <class T>
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T* operator_new_allocate(std::size_t count)
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{
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const std::size_t max_count = std::size_t(-1)/(2*sizeof(T));
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if(BOOST_UNLIKELY(count > max_count))
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throw_bad_alloc();
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#if defined(__cpp_aligned_new)
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BOOST_IF_CONSTEXPR(__STDCPP_DEFAULT_NEW_ALIGNMENT__ < alignof(T)) {
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return static_cast<T*>(::operator new(count*sizeof(T), std::align_val_t(alignof(T))));
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}
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#endif
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return static_cast<T*>(::operator new(count*sizeof(T)));
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}
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template <class T>
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void operator_delete_deallocate(T* ptr, std::size_t n) BOOST_NOEXCEPT_OR_NOTHROW
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{
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(void)n;
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#ifdef __cpp_aligned_new
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BOOST_IF_CONSTEXPR(__STDCPP_DEFAULT_NEW_ALIGNMENT__ < alignof(T)) {
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# if defined(__cpp_sized_deallocation)
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::operator delete((void*)ptr, n * sizeof(T), std::align_val_t(alignof(T)));
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#else
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::operator delete((void*)ptr, std::align_val_t(alignof(T)));
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# endif
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return;
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}
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#endif
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# if defined(__cpp_sized_deallocation)
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::operator delete((void*)ptr, n * sizeof(T));
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#else
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::operator delete((void*)ptr);
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# endif
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}
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} //namespace dtl {
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} //namespace container {
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} //namespace boost {
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#endif //#ifndef BOOST_CONTAINER_DETAIL_OPERATOR_NEW_HELPERS_HPP
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