michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * This file defines various reserved slot indices used by JavaScript
michael@0:  * reflections of DOM objects.
michael@0:  */
michael@0: #ifndef mozilla_dom_DOMSlots_h
michael@0: #define mozilla_dom_DOMSlots_h
michael@0: 
michael@0: // We use slot 0 for holding the raw object.  This is safe for both
michael@0: // globals and non-globals.
michael@0: #define DOM_OBJECT_SLOT 0
michael@0: 
michael@0: // The total number of slots non-proxy DOM objects use by default.
michael@0: // Specific objects may have more for storing cached values.
michael@0: #define DOM_INSTANCE_RESERVED_SLOTS 1
michael@0: 
michael@0: // NOTE: This is baked into the Ion JIT as 0 in codegen for LGetDOMProperty and
michael@0: // LSetDOMProperty. Those constants need to be changed accordingly if this value
michael@0: // changes.
michael@0: #define DOM_PROTO_INSTANCE_CLASS_SLOT 0
michael@0: 
michael@0: // Interface objects store a number of reserved slots equal to
michael@0: // DOM_INTERFACE_SLOTS_BASE + number of named constructors.
michael@0: #define DOM_INTERFACE_SLOTS_BASE 0
michael@0: 
michael@0: // Interface prototype objects store a number of reserved slots equal to
michael@0: // DOM_INTERFACE_PROTO_SLOTS_BASE or DOM_INTERFACE_PROTO_SLOTS_BASE + 1 if a
michael@0: // slot for the unforgeable holder is needed.
michael@0: #define DOM_INTERFACE_PROTO_SLOTS_BASE (DOM_PROTO_INSTANCE_CLASS_SLOT + 1)
michael@0: 
michael@0: #endif /* mozilla_dom_DOMSlots_h */