Chris@102: /*
Chris@102:  (c) 2014 Glen Joseph Fernandes
Chris@102:  glenjofe at gmail dot com
Chris@102: 
Chris@102:  Distributed under the Boost Software
Chris@102:  License, Version 1.0.
Chris@102:  http://boost.org/LICENSE_1_0.txt
Chris@102: */
Chris@102: #ifndef BOOST_ALIGN_DETAIL_ALIGN_HPP
Chris@102: #define BOOST_ALIGN_DETAIL_ALIGN_HPP
Chris@102: 
Chris@102: #include <boost/assert.hpp>
Chris@102: #include <boost/align/detail/address.hpp>
Chris@102: #include <boost/align/detail/is_alignment.hpp>
Chris@102: #include <cstddef>
Chris@102: 
Chris@102: namespace boost {
Chris@102:     namespace alignment {
Chris@102:         inline void* align(std::size_t alignment, std::size_t size,
Chris@102:             void*& ptr, std::size_t& space)
Chris@102:         {
Chris@102:             BOOST_ASSERT(detail::is_alignment(alignment));
Chris@102:             std::size_t n = detail::address_t(ptr) & (alignment - 1);
Chris@102:             if (n != 0) {
Chris@102:                 n = alignment - n;
Chris@102:             }
Chris@102:             void* p = 0;
Chris@102:             if (n <= space && size <= space - n) {
Chris@102:                 p = static_cast<char*>(ptr) + n;
Chris@102:                 ptr = p;
Chris@102:                 space -= n;
Chris@102:             }
Chris@102:             return p;
Chris@102:         }
Chris@102:     }
Chris@102: }
Chris@102: 
Chris@102: #endif