| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___MEMORY_ALIGN_H |
| #define _LIBCPP___MEMORY_ALIGN_H |
| |
| #include <__config> |
| #include <__cstddef/size_t.h> |
| #include <cstdint> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| inline namespace __align_inline { |
| _LIBCPP_HIDE_FROM_ABI inline void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space) { |
| void* __r = nullptr; |
| if (__sz <= __space) { |
| char* __p1 = static_cast<char*>(__ptr); |
| char* __p2 = reinterpret_cast<char*>(reinterpret_cast<uintptr_t>(__p1 + (__align - 1)) & -__align); |
| size_t __d = static_cast<size_t>(__p2 - __p1); |
| if (__d <= __space - __sz) { |
| __r = __p2; |
| __ptr = __r; |
| __space -= __d; |
| } |
| } |
| return __r; |
| } |
| |
| } // namespace __align_inline |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___MEMORY_ALIGN_H |
