| // Copyright 2017 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_DATA_HANDLER_H_ |
| #define V8_OBJECTS_DATA_HANDLER_H_ |
| |
| #include "src/objects/struct.h" |
| #include "torque-generated/field-offsets.h" |
| |
| // Has to be the last include (doesn't have include guards): |
| #include "src/objects/object-macros.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #include "torque-generated/src/objects/data-handler-tq.inc" |
| |
| // DataHandler is a base class for load and store handlers that can't be |
| // encoded in one Smi. Kind of a handler can be deduced from instance type. |
| class DataHandler : public Struct { |
| public: |
| // [smi_handler]: A Smi which encodes a handler or Code object (we still |
| // use code handlers for accessing lexical environment variables, but soon |
| // only smi handlers will remain). See LoadHandler and StoreHandler for |
| // details about encoding. |
| DECL_ACCESSORS(smi_handler, Object) |
| |
| // [validity_cell]: A validity Cell that guards prototype chain modifications. |
| DECL_ACCESSORS(validity_cell, Object) |
| |
| // Returns number of optional data fields available in the object. |
| inline int data_field_count() const; |
| |
| // [data1-3]: These are optional general-purpose fields whose content and |
| // presence depends on the handler kind. |
| DECL_ACCESSORS(data1, MaybeObject) |
| DECL_ACCESSORS(data2, MaybeObject) |
| DECL_ACCESSORS(data3, MaybeObject) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, |
| TORQUE_GENERATED_DATA_HANDLER_FIELDS) |
| |
| static const int kSizeWithData0 = kData1Offset; |
| static const int kSizeWithData1 = kData2Offset; |
| static const int kSizeWithData2 = kData3Offset; |
| static const int kSizeWithData3 = kHeaderSize; |
| |
| DECL_CAST(DataHandler) |
| |
| DECL_VERIFIER(DataHandler) |
| |
| class BodyDescriptor; |
| |
| OBJECT_CONSTRUCTORS(DataHandler, Struct); |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #include "src/objects/object-macros-undef.h" |
| |
| #endif // V8_OBJECTS_DATA_HANDLER_H_ |