blob: 147b0de0f9345abbf5a553614520dc37f7b06ffd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/*
(c) 2014 Glen Joseph Fernandes
glenjofe at gmail dot 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/assert.hpp>
#include <boost/config.hpp>
#include <boost/align/align.hpp>
#include <boost/align/alignment_of.hpp>
#include <boost/align/detail/is_alignment.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));
if (alignment < alignment_of<void*>::value) {
alignment = alignment_of<void*>::value;
}
std::size_t n = size + alignment - 1;
void* p1 = 0;
void* p2 = std::malloc(n + sizeof p1);
if (p2) {
p1 = static_cast<char*>(p2) + sizeof p1;
(void)align(alignment, size, p1, n);
*(static_cast<void**>(p1) - 1) = p2;
}
return p1;
}
inline void aligned_free(void* ptr)
BOOST_NOEXCEPT
{
if (ptr) {
void* p = *(static_cast<void**>(ptr) - 1);
std::free(p);
}
}
}
}
#endif
|
