forked from OSchip/llvm-project
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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_RESOURCE_MEMORY_RESOURCE_H
|
|
#define _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H
|
|
|
|
#include <__config>
|
|
#include <cstddef>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
#if _LIBCPP_STD_VER > 14
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
namespace pmr {
|
|
|
|
// [mem.res.class]
|
|
|
|
class _LIBCPP_TYPE_VIS memory_resource {
|
|
static const size_t __max_align = alignof(max_align_t);
|
|
|
|
public:
|
|
virtual ~memory_resource();
|
|
|
|
_LIBCPP_NODISCARD_AFTER_CXX17
|
|
[[using __gnu__: __returns_nonnull__, __alloc_size__(2), __alloc_align__(3)]] _LIBCPP_HIDE_FROM_ABI void*
|
|
allocate(size_t __bytes, size_t __align = __max_align) {
|
|
return do_allocate(__bytes, __align);
|
|
}
|
|
|
|
[[__gnu__::__nonnull__]] _LIBCPP_HIDE_FROM_ABI void
|
|
deallocate(void* __p, size_t __bytes, size_t __align = __max_align) {
|
|
do_deallocate(__p, __bytes, __align);
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI bool is_equal(const memory_resource& __other) const noexcept { return do_is_equal(__other); }
|
|
|
|
private:
|
|
virtual void* do_allocate(size_t, size_t) = 0;
|
|
virtual void do_deallocate(void*, size_t, size_t) = 0;
|
|
virtual bool do_is_equal(memory_resource const&) const noexcept = 0;
|
|
};
|
|
|
|
// [mem.res.eq]
|
|
|
|
inline _LIBCPP_HIDE_FROM_ABI bool operator==(const memory_resource& __lhs, const memory_resource& __rhs) noexcept {
|
|
return &__lhs == &__rhs || __lhs.is_equal(__rhs);
|
|
}
|
|
|
|
inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const memory_resource& __lhs, const memory_resource& __rhs) noexcept {
|
|
return !(__lhs == __rhs);
|
|
}
|
|
|
|
// [mem.res.global]
|
|
|
|
[[__gnu__::__returns_nonnull__]] _LIBCPP_FUNC_VIS memory_resource* get_default_resource() noexcept;
|
|
[[__gnu__::__returns_nonnull__]] _LIBCPP_FUNC_VIS memory_resource* set_default_resource(memory_resource*) noexcept;
|
|
[[using __gnu__: __returns_nonnull__, __const__]] _LIBCPP_FUNC_VIS memory_resource* new_delete_resource() noexcept;
|
|
[[using __gnu__: __returns_nonnull__, __const__]] _LIBCPP_FUNC_VIS memory_resource* null_memory_resource() noexcept;
|
|
|
|
} // namespace pmr
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_STD_VER > 14
|
|
|
|
#endif // _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H
|