2 * Copyright (C) 2011 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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26 #ifndef StorageBarrier_h
27 #define StorageBarrier_h
29 #include "JSGlobalData.h"
30 #include "WriteBarrier.h"
34 typedef WriteBarrierBase<Unknown>* PropertyStorage;
35 typedef const WriteBarrierBase<Unknown>* ConstPropertyStorage;
37 class StorageBarrier {
39 enum UncheckedTag { Unchecked };
40 StorageBarrier(JSGlobalData& globalData, JSCell* owner, PropertyStorage storage)
42 set(globalData, owner, storage);
45 StorageBarrier(PropertyStorage storage, UncheckedTag)
47 set(storage, Unchecked);
50 void set(JSGlobalData& globalData, JSCell* owner, PropertyStorage newStorage)
52 if (!globalData.heap.inPropertyStorageNursery(m_storage))
53 globalData.heap.writeBarrier(owner, JSValue());
54 m_storage = newStorage;
57 void set(PropertyStorage newStorage, UncheckedTag)
59 m_storage = newStorage;
62 WriteBarrierBase<Unknown>* operator->() const { return m_storage; }
63 WriteBarrierBase<Unknown>* operator->() { return m_storage; }
64 WriteBarrierBase<Unknown> operator*() const { return *m_storage; }
65 WriteBarrierBase<Unknown> operator*() { return *m_storage; }
66 const WriteBarrierBase<Unknown>& operator[](size_t i) const { return m_storage[i]; }
67 WriteBarrierBase<Unknown>& operator[](size_t i) { return m_storage[i]; }
69 ConstPropertyStorage get() const { return m_storage; }
70 PropertyStorage get() { return m_storage; }
73 PropertyStorage m_storage;