53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
/*
|
|
(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
|