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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. | 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 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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75 { | 75 { |
76 #if CHECK_REF_COUNTED_LIFECYCLE | 76 #if CHECK_REF_COUNTED_LIFECYCLE |
77 ASSERT(m_verifier.isSafeToUse()); | 77 ASSERT(m_verifier.isSafeToUse()); |
78 #endif | 78 #endif |
79 return m_refCount; | 79 return m_refCount; |
80 } | 80 } |
81 | 81 |
82 protected: | 82 protected: |
83 RefCountedBase() | 83 RefCountedBase() |
84 : m_refCount(1) | 84 : m_refCount(1) |
85 #if SECURITY_ASSERT_ENABLED | 85 #if ENABLE(SECURITY_ASSERT) |
86 , m_deletionHasBegun(false) | 86 , m_deletionHasBegun(false) |
87 #endif | 87 #endif |
88 #if CHECK_REF_COUNTED_LIFECYCLE | 88 #if CHECK_REF_COUNTED_LIFECYCLE |
89 , m_adoptionIsRequired(true) | 89 , m_adoptionIsRequired(true) |
90 #endif | 90 #endif |
91 { | 91 { |
92 } | 92 } |
93 | 93 |
94 ~RefCountedBase() | 94 ~RefCountedBase() |
95 { | 95 { |
96 ASSERT_WITH_SECURITY_IMPLICATION(m_deletionHasBegun); | 96 ASSERT_WITH_SECURITY_IMPLICATION(m_deletionHasBegun); |
97 #if CHECK_REF_COUNTED_LIFECYCLE | 97 #if CHECK_REF_COUNTED_LIFECYCLE |
98 ASSERT(!m_adoptionIsRequired); | 98 ASSERT(!m_adoptionIsRequired); |
99 #endif | 99 #endif |
100 } | 100 } |
101 | 101 |
102 // Returns whether the pointer should be freed or not. | 102 // Returns whether the pointer should be freed or not. |
103 bool derefBase() | 103 bool derefBase() |
104 { | 104 { |
105 ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun); | 105 ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun); |
106 #if CHECK_REF_COUNTED_LIFECYCLE | 106 #if CHECK_REF_COUNTED_LIFECYCLE |
107 ASSERT(m_verifier.isSafeToUse()); | 107 ASSERT(m_verifier.isSafeToUse()); |
108 ASSERT(!m_adoptionIsRequired); | 108 ASSERT(!m_adoptionIsRequired); |
109 #endif | 109 #endif |
110 | 110 |
111 ASSERT(m_refCount > 0); | 111 ASSERT(m_refCount > 0); |
112 --m_refCount; | 112 --m_refCount; |
113 if (!m_refCount) { | 113 if (!m_refCount) { |
114 #if SECURITY_ASSERT_ENABLED | 114 #if ENABLE(SECURITY_ASSERT) |
115 m_deletionHasBegun = true; | 115 m_deletionHasBegun = true; |
116 #endif | 116 #endif |
117 return true; | 117 return true; |
118 } | 118 } |
119 | 119 |
120 #if CHECK_REF_COUNTED_LIFECYCLE | 120 #if CHECK_REF_COUNTED_LIFECYCLE |
121 // Stop thread verification when the ref goes to 1 because it | 121 // Stop thread verification when the ref goes to 1 because it |
122 // is safe to be passed to another thread at this point. | 122 // is safe to be passed to another thread at this point. |
123 if (m_refCount == 1) | 123 if (m_refCount == 1) |
124 m_verifier.setShared(false); | 124 m_verifier.setShared(false); |
125 #endif | 125 #endif |
126 return false; | 126 return false; |
127 } | 127 } |
128 | 128 |
129 #if CHECK_REF_COUNTED_LIFECYCLE | 129 #if CHECK_REF_COUNTED_LIFECYCLE |
130 bool deletionHasBegun() const | 130 bool deletionHasBegun() const |
131 { | 131 { |
132 return m_deletionHasBegun; | 132 return m_deletionHasBegun; |
133 } | 133 } |
134 #endif | 134 #endif |
135 | 135 |
136 private: | 136 private: |
137 | 137 |
138 #if CHECK_REF_COUNTED_LIFECYCLE || SECURITY_ASSERT_ENABLED | 138 #if CHECK_REF_COUNTED_LIFECYCLE || ENABLE(SECURITY_ASSERT) |
139 friend void adopted(RefCountedBase*); | 139 friend void adopted(RefCountedBase*); |
140 #endif | 140 #endif |
141 | 141 |
142 int m_refCount; | 142 int m_refCount; |
143 #if SECURITY_ASSERT_ENABLED | 143 #if ENABLE(SECURITY_ASSERT) |
144 bool m_deletionHasBegun; | 144 bool m_deletionHasBegun; |
145 #endif | 145 #endif |
146 #if CHECK_REF_COUNTED_LIFECYCLE | 146 #if CHECK_REF_COUNTED_LIFECYCLE |
147 bool m_adoptionIsRequired; | 147 bool m_adoptionIsRequired; |
148 ThreadRestrictionVerifier m_verifier; | 148 ThreadRestrictionVerifier m_verifier; |
149 #endif | 149 #endif |
150 }; | 150 }; |
151 | 151 |
152 #if CHECK_REF_COUNTED_LIFECYCLE || SECURITY_ASSERT_ENABLED | 152 #if CHECK_REF_COUNTED_LIFECYCLE || ENABLE(SECURITY_ASSERT) |
153 inline void adopted(RefCountedBase* object) | 153 inline void adopted(RefCountedBase* object) |
154 { | 154 { |
155 if (!object) | 155 if (!object) |
156 return; | 156 return; |
157 ASSERT_WITH_SECURITY_IMPLICATION(!object->m_deletionHasBegun); | 157 ASSERT_WITH_SECURITY_IMPLICATION(!object->m_deletionHasBegun); |
158 #if CHECK_REF_COUNTED_LIFECYCLE | 158 #if CHECK_REF_COUNTED_LIFECYCLE |
159 object->m_adoptionIsRequired = false; | 159 object->m_adoptionIsRequired = false; |
160 #endif | 160 #endif |
161 } | 161 } |
162 #endif | 162 #endif |
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188 { | 188 { |
189 } | 189 } |
190 #endif | 190 #endif |
191 }; | 191 }; |
192 | 192 |
193 } // namespace WTF | 193 } // namespace WTF |
194 | 194 |
195 using WTF::RefCounted; | 195 using WTF::RefCounted; |
196 | 196 |
197 #endif // RefCounted_h | 197 #endif // RefCounted_h |
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