diff options
Diffstat (limited to 'dom/bindings/JSSlots.h')
| -rw-r--r-- | dom/bindings/JSSlots.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/dom/bindings/JSSlots.h b/dom/bindings/JSSlots.h new file mode 100644 index 000000000..5e19957d6 --- /dev/null +++ b/dom/bindings/JSSlots.h @@ -0,0 +1,34 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * This file defines various reserved slot indices used by JavaScript + * reflections of DOM objects. + */ +#ifndef mozilla_dom_DOMSlots_h +#define mozilla_dom_DOMSlots_h + +// We use slot 0 for holding the raw object. This is safe for both +// globals and non-globals. +// NOTE: This is baked into the Ion JIT as 0 in codegen for LGetDOMProperty and +// LSetDOMProperty. Those constants need to be changed accordingly if this value +// changes. +#define DOM_OBJECT_SLOT 0 + +// The total number of slots non-proxy DOM objects use by default. +// Specific objects may have more for storing cached values. +#define DOM_INSTANCE_RESERVED_SLOTS 1 + +// Interface objects store a number of reserved slots equal to +// DOM_INTERFACE_SLOTS_BASE + number of named constructors. +#define DOM_INTERFACE_SLOTS_BASE 0 + +// Interface prototype objects store a number of reserved slots equal to +// DOM_INTERFACE_PROTO_SLOTS_BASE or DOM_INTERFACE_PROTO_SLOTS_BASE + 1 if a +// slot for the unforgeable holder is needed. +#define DOM_INTERFACE_PROTO_SLOTS_BASE 0 + +#endif /* mozilla_dom_DOMSlots_h */ |