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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 |
| (...skipping 28 matching lines...) Expand all Loading... |
| 39 // This base class holds the non-template methods and attributes. | 39 // This base class holds the non-template methods and attributes. |
| 40 // The RefCounted class inherits from it reducing the template bloat | 40 // The RefCounted class inherits from it reducing the template bloat |
| 41 // generated by the compiler (technique called template hoisting). | 41 // generated by the compiler (technique called template hoisting). |
| 42 class WTF_EXPORT RefCountedBase { | 42 class WTF_EXPORT RefCountedBase { |
| 43 public: | 43 public: |
| 44 void ref() const { | 44 void ref() const { |
| 45 #if CHECK_REF_COUNTED_LIFECYCLE | 45 #if CHECK_REF_COUNTED_LIFECYCLE |
| 46 m_verifier.onRef(m_refCount); | 46 m_verifier.onRef(m_refCount); |
| 47 ASSERT(!m_adoptionIsRequired); | 47 ASSERT(!m_adoptionIsRequired); |
| 48 #endif | 48 #endif |
| 49 ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun); | 49 SECURITY_DCHECK(!m_deletionHasBegun); |
| 50 ++m_refCount; | 50 ++m_refCount; |
| 51 } | 51 } |
| 52 | 52 |
| 53 bool hasOneRef() const { | 53 bool hasOneRef() const { |
| 54 ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun); | 54 SECURITY_DCHECK(!m_deletionHasBegun); |
| 55 #if CHECK_REF_COUNTED_LIFECYCLE | 55 #if CHECK_REF_COUNTED_LIFECYCLE |
| 56 m_verifier.checkSafeToUse(); | 56 m_verifier.checkSafeToUse(); |
| 57 #endif | 57 #endif |
| 58 return m_refCount == 1; | 58 return m_refCount == 1; |
| 59 } | 59 } |
| 60 | 60 |
| 61 int refCount() const { | 61 int refCount() const { |
| 62 #if CHECK_REF_COUNTED_LIFECYCLE | 62 #if CHECK_REF_COUNTED_LIFECYCLE |
| 63 m_verifier.checkSafeToUse(); | 63 m_verifier.checkSafeToUse(); |
| 64 #endif | 64 #endif |
| 65 return m_refCount; | 65 return m_refCount; |
| 66 } | 66 } |
| 67 | 67 |
| 68 protected: | 68 protected: |
| 69 RefCountedBase() | 69 RefCountedBase() |
| 70 : m_refCount(1) | 70 : m_refCount(1) |
| 71 #if ENABLE(SECURITY_ASSERT) | 71 #if ENABLE(SECURITY_ASSERT) |
| 72 , | 72 , |
| 73 m_deletionHasBegun(false) | 73 m_deletionHasBegun(false) |
| 74 #endif | 74 #endif |
| 75 #if CHECK_REF_COUNTED_LIFECYCLE | 75 #if CHECK_REF_COUNTED_LIFECYCLE |
| 76 , | 76 , |
| 77 m_adoptionIsRequired(true) | 77 m_adoptionIsRequired(true) |
| 78 #endif | 78 #endif |
| 79 { | 79 { |
| 80 } | 80 } |
| 81 | 81 |
| 82 ~RefCountedBase() { | 82 ~RefCountedBase() { |
| 83 ASSERT_WITH_SECURITY_IMPLICATION(m_deletionHasBegun); | 83 SECURITY_DCHECK(m_deletionHasBegun); |
| 84 #if CHECK_REF_COUNTED_LIFECYCLE | 84 #if CHECK_REF_COUNTED_LIFECYCLE |
| 85 ASSERT(!m_adoptionIsRequired); | 85 ASSERT(!m_adoptionIsRequired); |
| 86 #endif | 86 #endif |
| 87 } | 87 } |
| 88 | 88 |
| 89 // Returns whether the pointer should be freed or not. | 89 // Returns whether the pointer should be freed or not. |
| 90 bool derefBase() const { | 90 bool derefBase() const { |
| 91 ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun); | 91 SECURITY_DCHECK(!m_deletionHasBegun); |
| 92 #if CHECK_REF_COUNTED_LIFECYCLE | 92 #if CHECK_REF_COUNTED_LIFECYCLE |
| 93 m_verifier.onDeref(m_refCount); | 93 m_verifier.onDeref(m_refCount); |
| 94 ASSERT(!m_adoptionIsRequired); | 94 ASSERT(!m_adoptionIsRequired); |
| 95 #endif | 95 #endif |
| 96 | 96 |
| 97 ASSERT(m_refCount > 0); | 97 ASSERT(m_refCount > 0); |
| 98 --m_refCount; | 98 --m_refCount; |
| 99 if (!m_refCount) { | 99 if (!m_refCount) { |
| 100 #if ENABLE(SECURITY_ASSERT) | 100 #if ENABLE(SECURITY_ASSERT) |
| 101 m_deletionHasBegun = true; | 101 m_deletionHasBegun = true; |
| (...skipping 20 matching lines...) Expand all Loading... |
| 122 #if CHECK_REF_COUNTED_LIFECYCLE | 122 #if CHECK_REF_COUNTED_LIFECYCLE |
| 123 mutable bool m_adoptionIsRequired; | 123 mutable bool m_adoptionIsRequired; |
| 124 mutable ThreadRestrictionVerifier m_verifier; | 124 mutable ThreadRestrictionVerifier m_verifier; |
| 125 #endif | 125 #endif |
| 126 }; | 126 }; |
| 127 | 127 |
| 128 #if CHECK_REF_COUNTED_LIFECYCLE || ENABLE(SECURITY_ASSERT) | 128 #if CHECK_REF_COUNTED_LIFECYCLE || ENABLE(SECURITY_ASSERT) |
| 129 inline void adopted(RefCountedBase* object) { | 129 inline void adopted(RefCountedBase* object) { |
| 130 if (!object) | 130 if (!object) |
| 131 return; | 131 return; |
| 132 ASSERT_WITH_SECURITY_IMPLICATION(!object->m_deletionHasBegun); | 132 SECURITY_DCHECK(!object->m_deletionHasBegun); |
| 133 #if CHECK_REF_COUNTED_LIFECYCLE | 133 #if CHECK_REF_COUNTED_LIFECYCLE |
| 134 object->m_adoptionIsRequired = false; | 134 object->m_adoptionIsRequired = false; |
| 135 #endif | 135 #endif |
| 136 } | 136 } |
| 137 #endif | 137 #endif |
| 138 | 138 |
| 139 template <typename T> | 139 template <typename T> |
| 140 class RefCounted : public RefCountedBase { | 140 class RefCounted : public RefCountedBase { |
| 141 WTF_MAKE_NONCOPYABLE(RefCounted); | 141 WTF_MAKE_NONCOPYABLE(RefCounted); |
| 142 | 142 |
| (...skipping 16 matching lines...) Expand all Loading... |
| 159 #else | 159 #else |
| 160 RefCounted() {} | 160 RefCounted() {} |
| 161 #endif | 161 #endif |
| 162 }; | 162 }; |
| 163 | 163 |
| 164 } // namespace WTF | 164 } // namespace WTF |
| 165 | 165 |
| 166 using WTF::RefCounted; | 166 using WTF::RefCounted; |
| 167 | 167 |
| 168 #endif // RefCounted_h | 168 #endif // RefCounted_h |
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