53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
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/*
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(c) 2014-2015 Glen Joseph Fernandes
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<glenjofe -at- gmail.com>
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Distributed under the Boost Software
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License, Version 1.0.
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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/align/detail/is_alignment.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/assert.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, std::size_t size)
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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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min_align = alignment_of<void*>::value
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};
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if (alignment < min_align) {
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alignment = min_align;
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}
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std::size_t n = size + alignment - min_align;
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void* r = 0;
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void* p = std::malloc(sizeof(void*) + n);
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if (p) {
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r = static_cast<char*>(p) + sizeof p;
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(void)align(alignment, size, r, n);
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*(static_cast<void**>(r) - 1) = p;
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}
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return r;
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}
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inline void aligned_free(void* ptr) BOOST_NOEXCEPT
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{
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if (ptr) {
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std::free(*(static_cast<void**>(ptr) - 1));
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}
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}
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} /* .alignment */
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} /* .boost */
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#endif
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