| // Copyright 2018 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_OBJECTS_STRUCT_H_ |
| #define V8_OBJECTS_STRUCT_H_ |
| |
| #include "src/objects.h" |
| #include "src/objects/heap-object.h" |
| |
| // Has to be the last include (doesn't have include guards): |
| #include "src/objects/object-macros.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // An abstract superclass, a marker class really, for simple structure classes. |
| // It doesn't carry much functionality but allows struct classes to be |
| // identified in the type system. |
| class Struct : public HeapObject { |
| public: |
| inline void InitializeBody(int object_size); |
| DECL_CAST(Struct) |
| void BriefPrintDetails(std::ostream& os); |
| |
| OBJECT_CONSTRUCTORS(Struct, HeapObject) |
| }; |
| |
| class Tuple2 : public Struct { |
| public: |
| DECL_ACCESSORS(value1, Object) |
| DECL_ACCESSORS(value2, Object) |
| |
| DECL_CAST(Tuple2) |
| |
| // Dispatched behavior. |
| DECL_PRINTER(Tuple2) |
| DECL_VERIFIER(Tuple2) |
| void BriefPrintDetails(std::ostream& os); |
| |
| // Layout description. |
| #define TUPLE2_FIELDS(V) \ |
| V(kValue1Offset, kTaggedSize) \ |
| V(kValue2Offset, kTaggedSize) \ |
| /* Total size. */ \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, TUPLE2_FIELDS) |
| #undef TUPLE2_FIELDS |
| |
| OBJECT_CONSTRUCTORS(Tuple2, Struct); |
| }; |
| |
| class Tuple3 : public Tuple2 { |
| public: |
| DECL_ACCESSORS(value3, Object) |
| |
| DECL_CAST(Tuple3) |
| |
| // Dispatched behavior. |
| DECL_PRINTER(Tuple3) |
| DECL_VERIFIER(Tuple3) |
| void BriefPrintDetails(std::ostream& os); |
| |
| // Layout description. |
| #define TUPLE3_FIELDS(V) \ |
| V(kValue3Offset, kTaggedSize) \ |
| /* Total size. */ \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(Tuple2::kSize, TUPLE3_FIELDS) |
| #undef TUPLE3_FIELDS |
| |
| OBJECT_CONSTRUCTORS(Tuple3, Tuple2); |
| }; |
| |
| // Support for JavaScript accessors: A pair of a getter and a setter. Each |
| // accessor can either be |
| // * a JavaScript function or proxy: a real accessor |
| // * a FunctionTemplateInfo: a real (lazy) accessor |
| // * undefined: considered an accessor by the spec, too, strangely enough |
| // * null: an accessor which has not been set |
| class AccessorPair : public Struct { |
| public: |
| DECL_ACCESSORS(getter, Object) |
| DECL_ACCESSORS(setter, Object) |
| |
| DECL_CAST(AccessorPair) |
| |
| static Handle<AccessorPair> Copy(Isolate* isolate, Handle<AccessorPair> pair); |
| |
| inline Object get(AccessorComponent component); |
| inline void set(AccessorComponent component, Object value); |
| |
| // Note: Returns undefined if the component is not set. |
| static Handle<Object> GetComponent(Isolate* isolate, |
| Handle<AccessorPair> accessor_pair, |
| AccessorComponent component); |
| |
| // Set both components, skipping arguments which are a JavaScript null. |
| inline void SetComponents(Object getter, Object setter); |
| |
| inline bool Equals(Object getter_value, Object setter_value); |
| |
| // Dispatched behavior. |
| DECL_PRINTER(AccessorPair) |
| DECL_VERIFIER(AccessorPair) |
| |
| // Layout description. |
| #define ACCESSOR_PAIR_FIELDS(V) \ |
| V(kGetterOffset, kTaggedSize) \ |
| V(kSetterOffset, kTaggedSize) \ |
| /* Total size. */ \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, ACCESSOR_PAIR_FIELDS) |
| #undef ACCESSOR_PAIR_FIELDS |
| |
| OBJECT_CONSTRUCTORS(AccessorPair, Struct); |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #include "src/objects/object-macros-undef.h" |
| |
| #endif // V8_OBJECTS_STRUCT_H_ |