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