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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 the pointer compression cage base from any read only or writable
// heap object. The resulting value is intended to be used only as a hoisted
// computation of cage base inside trivial accessors for optimizing value
// decompression. When pointer compression is disabled this function always
// returns nullptr.
V8_INLINE PtrComprCageBase GetPtrComprCageBase(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_
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