/*
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Copyright 2014-2015 Glen Joseph Fernandes
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(glenjofe@gmail.com)
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Distributed under the Boost Software License, Version 1.0.
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(http://www.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*
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aligned_alloc(std::size_t alignment, 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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N = alignment_of<void*>::value
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};
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if (alignment < N) {
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alignment = N;
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}
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std::size_t n = size + alignment - N;
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void* p = std::malloc(sizeof(void*) + n);
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if (p) {
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void* r = static_cast<char*>(p) + sizeof(void*);
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(void)boost::alignment::align(alignment, size, r, n);
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*(static_cast<void**>(r) - 1) = p;
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p = r;
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}
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return p;
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}
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inline void
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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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