1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/bindings/JSSlots.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,35 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.7 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/**
1.10 + * This file defines various reserved slot indices used by JavaScript
1.11 + * reflections of DOM objects.
1.12 + */
1.13 +#ifndef mozilla_dom_DOMSlots_h
1.14 +#define mozilla_dom_DOMSlots_h
1.15 +
1.16 +// We use slot 0 for holding the raw object. This is safe for both
1.17 +// globals and non-globals.
1.18 +#define DOM_OBJECT_SLOT 0
1.19 +
1.20 +// The total number of slots non-proxy DOM objects use by default.
1.21 +// Specific objects may have more for storing cached values.
1.22 +#define DOM_INSTANCE_RESERVED_SLOTS 1
1.23 +
1.24 +// NOTE: This is baked into the Ion JIT as 0 in codegen for LGetDOMProperty and
1.25 +// LSetDOMProperty. Those constants need to be changed accordingly if this value
1.26 +// changes.
1.27 +#define DOM_PROTO_INSTANCE_CLASS_SLOT 0
1.28 +
1.29 +// Interface objects store a number of reserved slots equal to
1.30 +// DOM_INTERFACE_SLOTS_BASE + number of named constructors.
1.31 +#define DOM_INTERFACE_SLOTS_BASE 0
1.32 +
1.33 +// Interface prototype objects store a number of reserved slots equal to
1.34 +// DOM_INTERFACE_PROTO_SLOTS_BASE or DOM_INTERFACE_PROTO_SLOTS_BASE + 1 if a
1.35 +// slot for the unforgeable holder is needed.
1.36 +#define DOM_INTERFACE_PROTO_SLOTS_BASE (DOM_PROTO_INSTANCE_CLASS_SLOT + 1)
1.37 +
1.38 +#endif /* mozilla_dom_DOMSlots_h */
