From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- js/public/shadow/Shape.h | 65 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 js/public/shadow/Shape.h (limited to 'js/public/shadow/Shape.h') diff --git a/js/public/shadow/Shape.h b/js/public/shadow/Shape.h new file mode 100644 index 0000000000..c83d320bf2 --- /dev/null +++ b/js/public/shadow/Shape.h @@ -0,0 +1,65 @@ +/* -*- 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/. */ + +/* + * Shadow definition of |js::BaseShape| and |js::Shape| innards. Do not use + * this directly! + */ + +#ifndef js_shadow_Shape_h +#define js_shadow_Shape_h + +#include // uint32_t + +#include "jstypes.h" // JS_PUBLIC_API + +#include "js/Id.h" // JS::PropertyKey + +struct JSClass; +class JS_PUBLIC_API JSObject; + +namespace JS { + +namespace shadow { + +struct BaseShape { + const JSClass* clasp; + JS::Realm* realm; +}; + +class Shape { + public: + shadow::BaseShape* base; + uint32_t immutableFlags; + + enum class Kind : uint8_t { + // SharedShape or DictionaryShape for NativeObject. + // (Only) these two kinds must have the low bit set, to allow for fast + // is-native checking. + Shared = 1, + Dictionary = 3, + // ProxyShape for ProxyObject. + Proxy = 0, + // WasmGCShape for WasmGCObject. + WasmGC = 2, + }; + + static constexpr uint32_t KIND_SHIFT = 4; + static constexpr uint32_t KIND_MASK = 0b11; + + static constexpr uint32_t FIXED_SLOTS_SHIFT = 6; + static constexpr uint32_t FIXED_SLOTS_MASK = 0x1f << FIXED_SLOTS_SHIFT; + + bool isProxy() const { + return Kind((immutableFlags >> KIND_SHIFT) & KIND_MASK) == Kind::Proxy; + } +}; + +} // namespace shadow + +} // namespace JS + +#endif // js_shadow_Shape_h -- cgit v1.2.3