The Tor Browser: js/src/vm/ObjectImpl-inl.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_ObjectImpl_inl_h

     8 #define vm_ObjectImpl_inl_h

    10 #include "vm/ObjectImpl.h"

    12 #include "jscntxt.h"

    13 #include "jsproxy.h"

    15 #include "vm/ProxyObject.h"

    16 #include "vm/TypedArrayObject.h"

    18 namespace js {

    20 /* static */ inline bool

    21 ObjectImpl::isExtensible(ExclusiveContext *cx, Handle<ObjectImpl*> obj, bool *extensible)

    22 {

    23     if (obj->asObjectPtr()->is<ProxyObject>()) {

    24         if (!cx->shouldBeJSContext())

    25             return false;

    26         HandleObject h =

    27             HandleObject::fromMarkedLocation(reinterpret_cast<JSObject* const*>(obj.address()));

    28         return Proxy::isExtensible(cx->asJSContext(), h, extensible);

    29     }

    31     *extensible = obj->nonProxyIsExtensible();

    32     return true;

    33 }

    35 inline bool

    36 ClassCanHaveFixedData(const Class *clasp)

    37 {

    38     // Normally, the number of fixed slots given an object is the maximum

    39     // permitted for its size class. For array buffers and typed arrays we only

    40     // use enough to cover the class reserved slots, so that the remaining

    41     // space in the object's allocation is available for the buffer's data.

    42     return clasp == &ArrayBufferObject::class_ || IsTypedArrayClass(clasp);

    43 }

    45 inline void *

    46 ObjectImpl::fixedData(size_t nslots) const

    47 {

    48     JS_ASSERT(ClassCanHaveFixedData(getClass()));

    49     JS_ASSERT(nslots == numFixedSlots() + (hasPrivate() ? 1 : 0));

    50     return &fixedSlots()[nslots];

    51 }

    53 } // namespace js

    55 #endif /* vm_ObjectImpl_inl_h */

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