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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/memory/weak_ptr.h" | 5 #include "base/memory/weak_ptr.h" |
6 | 6 |
7 namespace base { | 7 namespace base { |
8 namespace internal { | 8 namespace internal { |
9 | 9 |
10 WeakReference::Flag::Flag() : is_valid_(true) { | 10 WeakReference::Flag::Flag() : is_valid_(true) { |
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28 WeakReference::WeakReference() { | 28 WeakReference::WeakReference() { |
29 } | 29 } |
30 | 30 |
31 WeakReference::WeakReference(const Flag* flag) : flag_(flag) { | 31 WeakReference::WeakReference(const Flag* flag) : flag_(flag) { |
32 } | 32 } |
33 | 33 |
34 WeakReference::~WeakReference() { | 34 WeakReference::~WeakReference() { |
35 } | 35 } |
36 | 36 |
37 bool WeakReference::is_valid() const { | 37 bool WeakReference::is_valid() const { |
38 return flag_ && flag_->IsValid(); | 38 return flag_.get() && flag_->IsValid(); |
39 } | 39 } |
40 | 40 |
41 WeakReferenceOwner::WeakReferenceOwner() { | 41 WeakReferenceOwner::WeakReferenceOwner() { |
42 } | 42 } |
43 | 43 |
44 WeakReferenceOwner::~WeakReferenceOwner() { | 44 WeakReferenceOwner::~WeakReferenceOwner() { |
45 Invalidate(); | 45 Invalidate(); |
46 } | 46 } |
47 | 47 |
48 WeakReference WeakReferenceOwner::GetRef() const { | 48 WeakReference WeakReferenceOwner::GetRef() const { |
49 // We also want to reattach to the current thread if all previous references | 49 // We also want to reattach to the current thread if all previous references |
50 // have gone away. | 50 // have gone away. |
51 if (!HasRefs()) | 51 if (!HasRefs()) |
52 flag_ = new WeakReference::Flag(); | 52 flag_ = new WeakReference::Flag(); |
53 return WeakReference(flag_); | 53 return WeakReference(flag_.get()); |
54 } | 54 } |
55 | 55 |
56 void WeakReferenceOwner::Invalidate() { | 56 void WeakReferenceOwner::Invalidate() { |
57 if (flag_) { | 57 if (flag_.get()) { |
58 flag_->Invalidate(); | 58 flag_->Invalidate(); |
59 flag_ = NULL; | 59 flag_ = NULL; |
60 } | 60 } |
61 } | 61 } |
62 | 62 |
63 WeakPtrBase::WeakPtrBase() { | 63 WeakPtrBase::WeakPtrBase() { |
64 } | 64 } |
65 | 65 |
66 WeakPtrBase::~WeakPtrBase() { | 66 WeakPtrBase::~WeakPtrBase() { |
67 } | 67 } |
68 | 68 |
69 WeakPtrBase::WeakPtrBase(const WeakReference& ref) : ref_(ref) { | 69 WeakPtrBase::WeakPtrBase(const WeakReference& ref) : ref_(ref) { |
70 } | 70 } |
71 | 71 |
72 } // namespace internal | 72 } // namespace internal |
73 } // namespace base | 73 } // namespace base |
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