| // Copyright 2019 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_EXECUTION_ISOLATE_UTILS_H_ |
| #define V8_EXECUTION_ISOLATE_UTILS_H_ |
| |
| #include "src/common/globals.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Computes isolate from any read only or writable heap object. The resulting |
| // value is intended to be used only as a hoisted computation of isolate root |
| // inside trivial accessors for optmizing value decompression. |
| // When pointer compression is disabled this function always returns nullptr. |
| V8_INLINE const Isolate* GetIsolateForPtrCompr(HeapObject object); |
| |
| V8_INLINE Heap* GetHeapFromWritableObject(HeapObject object); |
| |
| V8_INLINE Isolate* GetIsolateFromWritableObject(HeapObject object); |
| |
| // Returns true if it succeeded to obtain isolate from given object. |
| // If it fails then the object is definitely a read-only object but it may also |
| // succeed for read only objects if pointer compression is enabled. |
| V8_INLINE bool GetIsolateFromHeapObject(HeapObject object, Isolate** isolate); |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_EXECUTION_ISOLATE_UTILS_H_ |
