The Tor Browser: js/src/vm/ArrayObject.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     7 #ifndef vm_ArrayObject_h

     8 #define vm_ArrayObject_h

    10 #include "jsobj.h"

    12 namespace js {

    14 class ArrayObject : public JSObject

    15 {

    16   public:

    17     // Array(x) eagerly allocates dense elements if x <= this value.

    18     static const uint32_t EagerAllocationMaxLength = 2048;

    20     static const Class class_;

    22     bool lengthIsWritable() const {

    23         return !getElementsHeader()->hasNonwritableArrayLength();

    24     }

    26     uint32_t length() const {

    27         return getElementsHeader()->length;

    28     }

    30     inline void setLength(ExclusiveContext *cx, uint32_t length);

    32     // Variant of setLength for use on arrays where the length cannot overflow int32_t.

    33     void setLengthInt32(uint32_t length) {

    34         JS_ASSERT(lengthIsWritable());

    35         JS_ASSERT(length <= INT32_MAX);

    36         getElementsHeader()->length = length;

    37     }

    38 };

    40 } // namespace js

    42 #endif // vm_ArrayObject_h

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