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/* -*- 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 */
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