/src/mozilla-central/js/src/vm/ReceiverGuard-inl.h
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1 | | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
2 | | * vim: set ts=8 sts=4 et sw=4 tw=99: |
3 | | * This Source Code Form is subject to the terms of the Mozilla Public |
4 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
5 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | | |
7 | | #ifndef vm_ReceiverGuard_inl_h |
8 | | #define vm_ReceiverGuard_inl_h |
9 | | |
10 | | #include "vm/ReceiverGuard.h" |
11 | | |
12 | | #include "builtin/TypedObject.h" |
13 | | #include "vm/JSObject.h" |
14 | | #include "vm/ShapedObject.h" |
15 | | #include "vm/UnboxedObject.h" |
16 | | |
17 | | namespace js { |
18 | | |
19 | | MOZ_ALWAYS_INLINE |
20 | | ReceiverGuard::ReceiverGuard(JSObject* obj) |
21 | | : group(nullptr), shape(nullptr) |
22 | 0 | { |
23 | 0 | if (!obj->isNative()) { |
24 | 0 | if (obj->is<UnboxedPlainObject>()) { |
25 | 0 | group = obj->group(); |
26 | 0 | if (UnboxedExpandoObject* expando = obj->as<UnboxedPlainObject>().maybeExpando()) { |
27 | 0 | shape = expando->lastProperty(); |
28 | 0 | } |
29 | 0 | return; |
30 | 0 | } |
31 | 0 | if (obj->is<TypedObject>()) { |
32 | 0 | group = obj->group(); |
33 | 0 | return; |
34 | 0 | } |
35 | 0 | } |
36 | 0 | shape = obj->as<ShapedObject>().shape(); |
37 | 0 | } |
38 | | |
39 | | MOZ_ALWAYS_INLINE |
40 | | ReceiverGuard::ReceiverGuard(ObjectGroup* group, Shape* shape) |
41 | | : group(group), shape(shape) |
42 | 0 | { |
43 | 0 | if (group) { |
44 | 0 | const Class* clasp = group->clasp(); |
45 | 0 | if (clasp == &UnboxedPlainObject::class_) { |
46 | 0 | // Keep both group and shape. |
47 | 0 | } else if (IsTypedObjectClass(clasp)) { |
48 | 0 | this->shape = nullptr; |
49 | 0 | } else { |
50 | 0 | this->group = nullptr; |
51 | 0 | } |
52 | 0 | } |
53 | 0 | } |
54 | | |
55 | | } // namespace js |
56 | | |
57 | | #endif /* vm_ReceiverGuard_inl_h */ |