39 lines
1.0 KiB
C++
39 lines
1.0 KiB
C++
/*
|
|
Copyright (c) 2014 Glen Joseph Fernandes
|
|
glenfe at live dot com
|
|
|
|
Distributed under the Boost Software License,
|
|
Version 1.0. (See accompanying file LICENSE_1_0.txt
|
|
or copy at http://boost.org/LICENSE_1_0.txt)
|
|
*/
|
|
#ifndef BOOST_ALIGN_DETAIL_ALIGN_HPP
|
|
#define BOOST_ALIGN_DETAIL_ALIGN_HPP
|
|
|
|
#include <boost/assert.hpp>
|
|
#include <boost/align/detail/address.hpp>
|
|
#include <boost/align/detail/is_alignment.hpp>
|
|
#include <cstddef>
|
|
|
|
namespace boost {
|
|
namespace alignment {
|
|
inline void* align(std::size_t alignment, std::size_t size,
|
|
void*& ptr, std::size_t& space)
|
|
{
|
|
BOOST_ASSERT(detail::is_alignment(alignment));
|
|
std::size_t n = detail::address_t(ptr) & (alignment - 1);
|
|
if (n != 0) {
|
|
n = alignment - n;
|
|
}
|
|
void* p = 0;
|
|
if (n <= space && size <= space - n) {
|
|
p = static_cast<char*>(ptr) + n;
|
|
ptr = p;
|
|
space -= n;
|
|
}
|
|
return p;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|