Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H |
| 10 | #define _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H |
| 11 | |
| 12 | #include <__config> |
| 13 | #include <__cstddef/max_align_t.h> |
| 14 | #include <__cstddef/size_t.h> |
| 15 | #include <__fwd/memory_resource.h> |
| 16 | |
| 17 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 18 | # pragma GCC system_header |
| 19 | #endif |
| 20 | |
| 21 | #if _LIBCPP_STD_VER >= 17 |
| 22 | |
| 23 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 24 | |
| 25 | namespace pmr { |
| 26 | |
| 27 | // [mem.res.class] |
| 28 | |
| 29 | class _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource { |
| 30 | static const size_t __max_align = alignof(max_align_t); |
| 31 | |
| 32 | public: |
| 33 | virtual ~memory_resource(); |
| 34 | |
| 35 | [[nodiscard]] [[using __gnu__: __returns_nonnull__, __alloc_size__(2), __alloc_align__(3)]] |
| 36 | _LIBCPP_HIDE_FROM_ABI void* allocate(size_t __bytes, size_t __align = __max_align) { |
| 37 | return do_allocate(__bytes, __align); |
| 38 | } |
| 39 | |
| 40 | [[__gnu__::__nonnull__]] _LIBCPP_HIDE_FROM_ABI void |
| 41 | deallocate(void* __p, size_t __bytes, size_t __align = __max_align) { |
| 42 | do_deallocate(__p, __bytes, __align); |
| 43 | } |
| 44 | |
| 45 | _LIBCPP_HIDE_FROM_ABI bool is_equal(const memory_resource& __other) const noexcept { return do_is_equal(__other); } |
| 46 | |
| 47 | private: |
| 48 | virtual void* do_allocate(size_t, size_t) = 0; |
| 49 | virtual void do_deallocate(void*, size_t, size_t) = 0; |
| 50 | virtual bool do_is_equal(memory_resource const&) const noexcept = 0; |
| 51 | }; |
| 52 | |
| 53 | // [mem.res.eq] |
| 54 | |
| 55 | inline _LIBCPP_AVAILABILITY_PMR _LIBCPP_HIDE_FROM_ABI bool |
| 56 | operator==(const memory_resource& __lhs, const memory_resource& __rhs) noexcept { |
| 57 | return &__lhs == &__rhs || __lhs.is_equal(__rhs); |
| 58 | } |
| 59 | |
| 60 | # if _LIBCPP_STD_VER <= 17 |
| 61 | |
| 62 | inline _LIBCPP_AVAILABILITY_PMR _LIBCPP_HIDE_FROM_ABI bool |
| 63 | operator!=(const memory_resource& __lhs, const memory_resource& __rhs) noexcept { |
| 64 | return !(__lhs == __rhs); |
| 65 | } |
| 66 | |
| 67 | # endif |
| 68 | |
| 69 | // [mem.res.global] |
| 70 | |
| 71 | [[__gnu__::__returns_nonnull__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource* |
| 72 | get_default_resource() noexcept; |
| 73 | |
| 74 | [[__gnu__::__returns_nonnull__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource* |
| 75 | set_default_resource(memory_resource*) noexcept; |
| 76 | |
| 77 | [[using __gnu__: __returns_nonnull__, __const__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource* |
| 78 | new_delete_resource() noexcept; |
| 79 | |
| 80 | [[using __gnu__: __returns_nonnull__, __const__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource* |
| 81 | null_memory_resource() noexcept; |
| 82 | |
| 83 | } // namespace pmr |
| 84 | |
| 85 | _LIBCPP_END_NAMESPACE_STD |
| 86 | |
| 87 | #endif // _LIBCPP_STD_VER >= 17 |
| 88 | |
| 89 | #endif // _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H |
| 90 |
Warning: This file is not a C or C++ file. It does not have highlighting.