js/src/vm/ArrayObject.h@6474c204b198 (annotated)
js/src/vm/ArrayObject.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| michael@0 | 2 | * vim: set ts=8 sts=4 et sw=4 tw=99: |
| michael@0 | 3 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef vm_ArrayObject_h |
| michael@0 | 8 | #define vm_ArrayObject_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "jsobj.h" |
| michael@0 | 11 | |
| michael@0 | 12 | namespace js { |
| michael@0 | 13 | |
| michael@0 | 14 | class ArrayObject : public JSObject |
| michael@0 | 15 | { |
| michael@0 | 16 | public: |
| michael@0 | 17 | // Array(x) eagerly allocates dense elements if x <= this value. |
| michael@0 | 18 | static const uint32_t EagerAllocationMaxLength = 2048; |
| michael@0 | 19 | |
| michael@0 | 20 | static const Class class_; |
| michael@0 | 21 | |
| michael@0 | 22 | bool lengthIsWritable() const { |
| michael@0 | 23 | return !getElementsHeader()->hasNonwritableArrayLength(); |
| michael@0 | 24 | } |
| michael@0 | 25 | |
| michael@0 | 26 | uint32_t length() const { |
| michael@0 | 27 | return getElementsHeader()->length; |
| michael@0 | 28 | } |
| michael@0 | 29 | |
| michael@0 | 30 | inline void setLength(ExclusiveContext *cx, uint32_t length); |
| michael@0 | 31 | |
| michael@0 | 32 | // Variant of setLength for use on arrays where the length cannot overflow int32_t. |
| michael@0 | 33 | void setLengthInt32(uint32_t length) { |
| michael@0 | 34 | JS_ASSERT(lengthIsWritable()); |
| michael@0 | 35 | JS_ASSERT(length <= INT32_MAX); |
| michael@0 | 36 | getElementsHeader()->length = length; |
| michael@0 | 37 | } |
| michael@0 | 38 | }; |
| michael@0 | 39 | |
| michael@0 | 40 | } // namespace js |
| michael@0 | 41 | |
| michael@0 | 42 | #endif // vm_ArrayObject_h |
| michael@0 | 43 |
