diff options
Diffstat (limited to 'boost/align/detail/aligned_alloc.hpp')
-rw-r--r-- | boost/align/detail/aligned_alloc.hpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/boost/align/detail/aligned_alloc.hpp b/boost/align/detail/aligned_alloc.hpp new file mode 100644 index 0000000000..147b0de0f9 --- /dev/null +++ b/boost/align/detail/aligned_alloc.hpp @@ -0,0 +1,50 @@ +/* + (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 |