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/*
(c) 2014-2015 Glen Joseph Fernandes
<glenjofe -at- gmail.com>
Distributed under the Boost Software
License, Version 1.0.
http://boost.org/LICENSE_1_0.txt
*/
#ifndef BOOST_ALIGN_DETAIL_ALIGNED_ALLOC_HPP
#define BOOST_ALIGN_DETAIL_ALIGNED_ALLOC_HPP
#include <boost/align/detail/is_alignment.hpp>
#include <boost/align/align.hpp>
#include <boost/align/alignment_of.hpp>
#include <boost/assert.hpp>
#include <cstdlib>
namespace boost {
namespace alignment {
inline void* aligned_alloc(std::size_t alignment, std::size_t size)
BOOST_NOEXCEPT
{
BOOST_ASSERT(detail::is_alignment(alignment));
enum {
min_align = alignment_of<void*>::value
};
if (alignment < min_align) {
alignment = min_align;
}
std::size_t n = size + alignment - min_align;
void* r = 0;
void* p = std::malloc(sizeof(void*) + n);
if (p) {
r = static_cast<char*>(p) + sizeof p;
(void)align(alignment, size, r, n);
*(static_cast<void**>(r) - 1) = p;
}
return r;
}
inline void aligned_free(void* ptr) BOOST_NOEXCEPT
{
if (ptr) {
std::free(*(static_cast<void**>(ptr) - 1));
}
}
} /* .alignment */
} /* .boost */
#endif
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