/* -*- 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/. */
#ifndef jit_TemplateObject_h
#define jit_TemplateObject_h
#include "vm/NativeObject.h"
#include "vm/Shape.h"
namespace js {
namespace jit {
class TemplateNativeObject;
// Wrapper for template objects. This should only expose methods that can be
// safely called off-thread without racing with the main thread.
class TemplateObject {
protected:
JSObject* obj_;
public:
explicit TemplateObject(JSObject* obj) : obj_(obj) {}
inline gc::AllocKind getAllocKind()
const;
// The following methods rely on the object's group->clasp. This is safe
// to read off-thread for template objects.
inline bool isNativeObject()
const;
inline const TemplateNativeObject& asTemplateNativeObject()
const;
inline bool isArrayObject()
const;
inline bool isArgumentsObject()
const;
inline bool isTypedArrayObject()
const;
inline bool isRegExpObject()
const;
inline bool isCallObject()
const;
inline bool isBlockLexicalEnvironmentObject()
const;
inline bool isPlainObject()
const;
// The shape should not change. This is true for template objects because
// they're never exposed to arbitrary script.
inline gc::Cell* shape()
const;
};
class TemplateNativeObject :
public TemplateObject {
protected:
NativeObject& asNativeObject()
const {
return obj_->as<NativeObject>(); }
public:
// Reading slot counts and object slots is safe, as long as we don't touch
// the BaseShape (it can change when we create a ShapeTable for the shape).
inline bool hasDynamicSlots()
const;
inline uint32_t numDynamicSlots()
const;
inline uint32_t numUsedFixedSlots()
const;
inline uint32_t numFixedSlots()
const;
inline uint32_t slotSpan()
const;
inline Value getSlot(uint32_t i)
const;
// Reading ObjectElements fields is safe, except for the flags.
// isSharedMemory is an exception: it's debug-only and not called on arrays.
#ifdef DEBUG
inline bool isSharedMemory()
const;
#endif
inline uint32_t getDenseCapacity()
const;
inline uint32_t getDenseInitializedLength()
const;
inline uint32_t getArrayLength()
const;
inline bool hasDynamicElements()
const;
inline const Value* getDenseElements()
const;
inline gc::Cell* regExpShared()
const;
};
}
// namespace jit
}
// namespace js
#endif /* jit_TemplateObject_h */
