blob: d46c253d139067f814e68c19aa356dc1f5de76b6 (
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
|
/*
* Copyright Andrey Semashev 2007 - 2015.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*/
/*!
* \file alignment_gap_between.hpp
* \author Andrey Semashev
* \date 20.11.2007
*
* \brief This header is the Boost.Log library implementation, see the library documentation
* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
*/
#ifndef BOOST_LOG_ALIGNMENT_GAP_BETWEEN_HPP_INCLUDED_
#define BOOST_LOG_ALIGNMENT_GAP_BETWEEN_HPP_INCLUDED_
#include <boost/type_traits/alignment_of.hpp>
#include <boost/log/detail/config.hpp>
#include <boost/log/detail/header.hpp>
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
namespace aux {
//! The metafunction computes the minimal gap between objects t1 and t2 of types T1 and T2
//! that would be needed to maintain the alignment of t2 if it's placed right after t1
template< typename T1, typename T2 >
struct alignment_gap_between
{
enum _
{
T2_alignment = boost::alignment_of< T2 >::value,
tail_size = sizeof(T1) % T2_alignment,
value = tail_size > 0 ? T2_alignment - tail_size : 0
};
};
} // namespace aux
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#include <boost/log/detail/footer.hpp>
#endif // BOOST_LOG_ALIGNMENT_GAP_BETWEEN_HPP_INCLUDED_
|
