54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/*
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Copyright (c) 2014 Glen Joseph Fernandes
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glenfe at live dot com
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Distributed under the Boost Software License,
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Version 1.0. (See accompanying file LICENSE_1_0.txt
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or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_ALIGN_DETAIL_ALIGNED_ALLOC_HPP
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#define BOOST_ALIGN_DETAIL_ALIGNED_ALLOC_HPP
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#include <boost/assert.hpp>
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#include <boost/config.hpp>
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#include <boost/align/align.hpp>
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#include <boost/align/alignment_of.hpp>
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#include <boost/align/detail/is_alignment.hpp>
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#include <cstdlib>
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namespace boost {
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namespace alignment {
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inline void* aligned_alloc(std::size_t alignment,
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std::size_t size) BOOST_NOEXCEPT
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{
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BOOST_ASSERT(detail::is_alignment(alignment));
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enum {
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void_align = alignment_of<void*>::value,
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};
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if (alignment < void_align) {
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alignment = void_align;
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}
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std::size_t n = size + alignment - 1;
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void* p1 = 0;
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void* p2 = std::malloc(n + sizeof p1);
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if (p2) {
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p1 = static_cast<char*>(p2) + sizeof p1;
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(void)align(alignment, size, p1, n);
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*(static_cast<void**>(p1) - 1) = p2;
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}
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return p1;
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}
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inline void aligned_free(void* ptr)
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BOOST_NOEXCEPT
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{
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if (ptr) {
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void* p = *(static_cast<void**>(ptr) - 1);
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std::free(p);
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}
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}
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}
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}
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#endif
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