v8
10.1.124 (node 18.2.0)
V8 is Google's open source JavaScript engine
object-size-trait.h
Go to the documentation of this file.
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// Copyright 2021 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#
ifndef
INCLUDE_CPPGC_OBJECT_SIZE_TRAIT_H_
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#
define
INCLUDE_CPPGC_OBJECT_SIZE_TRAIT_H_
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#
include
<
cstddef
>
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#
include
"cppgc/type-traits.h"
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#
include
"v8config.h"
// NOLINT(build/include_directory)
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namespace
cppgc
{
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namespace
internal
{
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struct
V8_EXPORT
BaseObjectSizeTrait
{
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protected
:
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static
size_t
GetObjectSizeForGarbageCollected
(
const
void
*);
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static
size_t
GetObjectSizeForGarbageCollectedMixin
(
const
void
*);
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};
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}
// namespace internal
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namespace
subtle
{
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/**
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* Trait specifying how to get the size of an object that was allocated using
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* `MakeGarbageCollected()`. Also supports querying the size with an inner
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* pointer to a mixin.
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*/
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template
<
typename
T,
bool
= IsGarbageCollectedMixinTypeV<T>>
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struct
ObjectSizeTrait;
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template
<
typename
T>
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struct
ObjectSizeTrait<T,
false
> :
cppgc
::
internal
::
BaseObjectSizeTrait
{
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static_assert
(
sizeof
(T),
"T must be fully defined"
);
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static_assert
(IsGarbageCollectedTypeV<T>,
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"T must be of type GarbageCollected or GarbageCollectedMixin"
);
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static
size_t
GetSize
(
const
T& object) {
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return
GetObjectSizeForGarbageCollected
(
&object
)
;
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}
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};
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template
<
typename
T>
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struct
ObjectSizeTrait<T,
true
> :
cppgc
::
internal
::
BaseObjectSizeTrait
{
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static_assert
(
sizeof
(T),
"T must be fully defined"
);
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static
size_t
GetSize
(
const
T& object) {
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return
GetObjectSizeForGarbageCollectedMixin
(
&object
)
;
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}
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};
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}
// namespace subtle
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}
// namespace cppgc
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#
endif
// INCLUDE_CPPGC_OBJECT_SIZE_TRAIT_H_
include
cppgc
object-size-trait.h
Generated on Tue May 24 2022 19:28:54 for v8 by
1.9.1