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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2009, 2010, 2012 Apple Inc. All rights reserved. | 2 * Copyright (C) 2006, 2007, 2009, 2010, 2012 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * This library is free software; you can redistribute it and/or | 4 * This library is free software; you can redistribute it and/or |
5 * modify it under the terms of the GNU Library General Public | 5 * modify it under the terms of the GNU Library General Public |
6 * License as published by the Free Software Foundation; either | 6 * License as published by the Free Software Foundation; either |
7 * version 2 of the License, or (at your option) any later version. | 7 * version 2 of the License, or (at your option) any later version. |
8 * | 8 * |
9 * This library is distributed in the hope that it will be useful, | 9 * This library is distributed in the hope that it will be useful, |
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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21 #ifndef TreeShared_h | 21 #ifndef TreeShared_h |
22 #define TreeShared_h | 22 #define TreeShared_h |
23 | 23 |
24 #include "public/platform/WebPrivatePtr.h" | 24 #include "public/platform/WebPrivatePtr.h" |
25 #include "wtf/Assertions.h" | 25 #include "wtf/Assertions.h" |
26 #include "wtf/MainThread.h" | 26 #include "wtf/MainThread.h" |
27 #include "wtf/Noncopyable.h" | 27 #include "wtf/Noncopyable.h" |
28 | 28 |
29 namespace WebCore { | 29 namespace WebCore { |
30 | 30 |
31 #if SECURITY_ASSERT_ENABLED | 31 #if ENABLE(SECURITY_ASSERT) |
32 template<typename NodeType> class TreeShared; | 32 template<typename NodeType> class TreeShared; |
33 template<typename NodeType> void adopted(TreeShared<NodeType>*); | 33 template<typename NodeType> void adopted(TreeShared<NodeType>*); |
34 #endif | 34 #endif |
35 | 35 |
36 template<typename NodeType> class TreeShared : public NoBaseWillBeGarbageCollect
edFinalized<NodeType> { | 36 template<typename NodeType> class TreeShared : public NoBaseWillBeGarbageCollect
edFinalized<NodeType> { |
37 WTF_MAKE_NONCOPYABLE(TreeShared); | 37 WTF_MAKE_NONCOPYABLE(TreeShared); |
38 protected: | 38 protected: |
39 TreeShared() | 39 TreeShared() |
40 : m_refCount(1) | 40 : m_refCount(1) |
41 #if SECURITY_ASSERT_ENABLED | 41 #if ENABLE(SECURITY_ASSERT) |
42 , m_deletionHasBegun(false) | 42 , m_deletionHasBegun(false) |
43 #if ASSERT_ENABLED | 43 #if ENABLE(ASSERT) |
44 , m_inRemovedLastRefFunction(false) | 44 , m_inRemovedLastRefFunction(false) |
45 , m_adoptionIsRequired(true) | 45 , m_adoptionIsRequired(true) |
46 #endif | 46 #endif |
47 #endif | 47 #endif |
48 { | 48 { |
49 ASSERT(isMainThread()); | 49 ASSERT(isMainThread()); |
50 } | 50 } |
51 | 51 |
52 ~TreeShared() | 52 ~TreeShared() |
53 { | 53 { |
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69 | 69 |
70 void deref() | 70 void deref() |
71 { | 71 { |
72 ASSERT(isMainThread()); | 72 ASSERT(isMainThread()); |
73 ASSERT(m_refCount > 0); | 73 ASSERT(m_refCount > 0); |
74 ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun); | 74 ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun); |
75 ASSERT(!m_inRemovedLastRefFunction); | 75 ASSERT(!m_inRemovedLastRefFunction); |
76 ASSERT(!m_adoptionIsRequired); | 76 ASSERT(!m_adoptionIsRequired); |
77 NodeType* thisNode = static_cast<NodeType*>(this); | 77 NodeType* thisNode = static_cast<NodeType*>(this); |
78 if (!--m_refCount && !thisNode->hasTreeSharedParent()) { | 78 if (!--m_refCount && !thisNode->hasTreeSharedParent()) { |
79 #if ASSERT_ENABLED | 79 #if ENABLE(ASSERT) |
80 m_inRemovedLastRefFunction = true; | 80 m_inRemovedLastRefFunction = true; |
81 #endif | 81 #endif |
82 thisNode->removedLastRef(); | 82 thisNode->removedLastRef(); |
83 } | 83 } |
84 } | 84 } |
85 | 85 |
86 int refCount() const { return m_refCount; } | 86 int refCount() const { return m_refCount; } |
87 | 87 |
88 private: | 88 private: |
89 int m_refCount; | 89 int m_refCount; |
90 | 90 |
91 #if SECURITY_ASSERT_ENABLED | 91 #if ENABLE(SECURITY_ASSERT) |
92 public: | 92 public: |
93 bool m_deletionHasBegun; | 93 bool m_deletionHasBegun; |
94 #if ASSERT_ENABLED | 94 #if ENABLE(ASSERT) |
95 bool m_inRemovedLastRefFunction; | 95 bool m_inRemovedLastRefFunction; |
96 | 96 |
97 private: | 97 private: |
98 friend void adopted<>(TreeShared<NodeType>*); | 98 friend void adopted<>(TreeShared<NodeType>*); |
99 bool m_adoptionIsRequired; | 99 bool m_adoptionIsRequired; |
100 #endif | 100 #endif |
101 #endif | 101 #endif |
102 }; | 102 }; |
103 | 103 |
104 #if SECURITY_ASSERT_ENABLED | 104 #if ENABLE(SECURITY_ASSERT) |
105 template<typename NodeType> void adopted(TreeShared<NodeType>* object) | 105 template<typename NodeType> void adopted(TreeShared<NodeType>* object) |
106 { | 106 { |
107 if (!object) | 107 if (!object) |
108 return; | 108 return; |
109 | 109 |
110 ASSERT_WITH_SECURITY_IMPLICATION(!object->m_deletionHasBegun); | 110 ASSERT_WITH_SECURITY_IMPLICATION(!object->m_deletionHasBegun); |
111 #if ASSERT_ENABLED | 111 #if ENABLE(ASSERT) |
112 ASSERT(!object->m_inRemovedLastRefFunction); | 112 ASSERT(!object->m_inRemovedLastRefFunction); |
113 object->m_adoptionIsRequired = false; | 113 object->m_adoptionIsRequired = false; |
114 #endif | 114 #endif |
115 } | 115 } |
116 #endif | 116 #endif |
117 | 117 |
118 } | 118 } |
119 | 119 |
120 #endif // TreeShared.h | 120 #endif // TreeShared.h |
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