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// 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 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_