181ad6265SDimitry Andric //===----------------------------------------------------------------------===// 281ad6265SDimitry Andric // 381ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 481ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 581ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 681ad6265SDimitry Andric // 781ad6265SDimitry Andric //===----------------------------------------------------------------------===// 881ad6265SDimitry Andric 981ad6265SDimitry Andric #ifndef _LIBCPP___MEMORY_ALLOCATE_AT_LEAST_H 1081ad6265SDimitry Andric #define _LIBCPP___MEMORY_ALLOCATE_AT_LEAST_H 1181ad6265SDimitry Andric 1281ad6265SDimitry Andric #include <__config> 1381ad6265SDimitry Andric #include <__memory/allocator_traits.h> 1481ad6265SDimitry Andric #include <cstddef> 1581ad6265SDimitry Andric 1681ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1781ad6265SDimitry Andric # pragma GCC system_header 1881ad6265SDimitry Andric #endif 1981ad6265SDimitry Andric 2081ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 2181ad6265SDimitry Andric 2206c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 23 2381ad6265SDimitry Andric 2481ad6265SDimitry Andric template <class _Alloc> 25cb14a3feSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto __allocate_at_least(_Alloc& __alloc, size_t __n) { 26*0fca6ea1SDimitry Andric return std::allocator_traits<_Alloc>::allocate_at_least(__alloc, __n); 2781ad6265SDimitry Andric } 28*0fca6ea1SDimitry Andric 2981ad6265SDimitry Andric #else 30*0fca6ea1SDimitry Andric 3181ad6265SDimitry Andric template <class _Pointer> 3281ad6265SDimitry Andric struct __allocation_result { 3381ad6265SDimitry Andric _Pointer ptr; 3481ad6265SDimitry Andric size_t count; 3581ad6265SDimitry Andric }; 3681ad6265SDimitry Andric 3781ad6265SDimitry Andric template <class _Alloc> 38*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI 39*0fca6ea1SDimitry Andric _LIBCPP_CONSTEXPR __allocation_result<typename allocator_traits<_Alloc>::pointer> 40cb14a3feSDimitry Andric __allocate_at_least(_Alloc& __alloc, size_t __n) { 4181ad6265SDimitry Andric return {__alloc.allocate(__n), __n}; 4281ad6265SDimitry Andric } 4381ad6265SDimitry Andric 4406c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 23 4581ad6265SDimitry Andric 4681ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD 4781ad6265SDimitry Andric 4881ad6265SDimitry Andric #endif // _LIBCPP___MEMORY_ALLOCATE_AT_LEAST_H 49