c3656afdf1
This reverts commit c861fe8a71e64f3d2108c58147e7375cd9314521. Unfortunately, this use of hidden visibility attributes causes user-defined specializations of standard-library types to also be marked hidden by default, which is incorrect. See discussion thread on #131156. ...and also reverts the follow-up commits: Revert "[libc++] Add explicit ABI annotations to functions from the block runtime declared in <__functional/function.h> (#140592)" This reverts commit 3e4c9dc299c35155934688184319d391b298fff7. Revert "[libc++] Make ABI annotations explicit for windows-specific code (#140507)" This reverts commit f73287e623a6c2e4a3485832bc3e10860cd26eb5. Revert "[libc++][NFC] Replace a few "namespace std" with the correct macro (#140510)" This reverts commit 1d411f27c769a32cb22ce50b9dc4421e34fd40dd.
90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H
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#define _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H
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#include <__config>
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#include <__cstddef/max_align_t.h>
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#include <__cstddef/size_t.h>
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#include <__fwd/memory_resource.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if _LIBCPP_STD_VER >= 17
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace pmr {
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// [mem.res.class]
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class _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource {
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static const size_t __max_align = alignof(max_align_t);
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public:
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virtual ~memory_resource();
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[[nodiscard]] [[using __gnu__: __returns_nonnull__, __alloc_size__(2), __alloc_align__(3)]]
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_LIBCPP_HIDE_FROM_ABI void* allocate(size_t __bytes, size_t __align = __max_align) {
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return do_allocate(__bytes, __align);
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}
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[[__gnu__::__nonnull__]] _LIBCPP_HIDE_FROM_ABI void
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deallocate(void* __p, size_t __bytes, size_t __align = __max_align) {
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do_deallocate(__p, __bytes, __align);
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}
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_LIBCPP_HIDE_FROM_ABI bool is_equal(const memory_resource& __other) const noexcept { return do_is_equal(__other); }
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private:
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virtual void* do_allocate(size_t, size_t) = 0;
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virtual void do_deallocate(void*, size_t, size_t) = 0;
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virtual bool do_is_equal(memory_resource const&) const noexcept = 0;
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};
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// [mem.res.eq]
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inline _LIBCPP_AVAILABILITY_PMR _LIBCPP_HIDE_FROM_ABI bool
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operator==(const memory_resource& __lhs, const memory_resource& __rhs) noexcept {
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return &__lhs == &__rhs || __lhs.is_equal(__rhs);
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}
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# if _LIBCPP_STD_VER <= 17
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inline _LIBCPP_AVAILABILITY_PMR _LIBCPP_HIDE_FROM_ABI bool
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operator!=(const memory_resource& __lhs, const memory_resource& __rhs) noexcept {
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return !(__lhs == __rhs);
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}
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# endif
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// [mem.res.global]
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[[__gnu__::__returns_nonnull__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource*
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get_default_resource() noexcept;
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[[__gnu__::__returns_nonnull__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource*
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set_default_resource(memory_resource*) noexcept;
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[[using __gnu__: __returns_nonnull__, __const__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource*
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new_delete_resource() noexcept;
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[[using __gnu__: __returns_nonnull__, __const__]] _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI memory_resource*
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null_memory_resource() noexcept;
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} // namespace pmr
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 17
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#endif // _LIBCPP___MEMORY_RESOURCE_MEMORY_RESOURCE_H
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