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- /*
- (c) 2014 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_ALIGN_HPP
- #define BOOST_ALIGN_DETAIL_ALIGN_HPP
- #include <boost/align/detail/is_alignment.hpp>
- #include <boost/assert.hpp>
- 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));
- if (size <= space) {
- char* p = reinterpret_cast<char*>((reinterpret_cast<std::
- size_t>(ptr) + alignment - 1) & ~(alignment - 1));
- std::ptrdiff_t n = p - static_cast<char*>(ptr);
- if (size <= space - n) {
- ptr = p;
- space -= n;
- return p;
- }
- }
- return 0;
- }
- } /* .alignment */
- } /* .boost */
- #endif
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