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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) { |
11 // Flags only become bound when checked for validity, or invalidated, | 11 // Flags only become bound when checked for validity, or invalidated, |
12 // so that we can check that later validity/invalidation operations on | 12 // so that we can check that later validity/invalidation operations on |
13 // the same Flag take place on the same sequenced thread. | 13 // the same Flag take place on the same sequenced thread. |
14 sequence_checker_.DetachFromSequence(); | 14 sequence_checker_.DetachFromSequence(); |
15 } | 15 } |
16 | 16 |
17 void WeakReference::Flag::Invalidate() { | 17 void WeakReference::Flag::Invalidate() { |
18 // The flag being invalidated with a single ref implies that there are no | 18 // The flag being invalidated with a single ref implies that there are no |
19 // weak pointers in existence. Allow deletion on other thread in this case. | 19 // weak pointers in existence. Allow deletion on other thread in this case. |
20 DCHECK(sequence_checker_.CalledOnValidSequencedThread() || HasOneRef()) | 20 DCHECK(sequence_checker_.CalledOnValidSequence() || HasOneRef()) |
21 << "WeakPtrs must be invalidated on the same sequenced thread."; | 21 << "WeakPtrs must be invalidated on the same sequenced thread."; |
22 is_valid_ = false; | 22 is_valid_ = false; |
23 } | 23 } |
24 | 24 |
25 bool WeakReference::Flag::IsValid() const { | 25 bool WeakReference::Flag::IsValid() const { |
26 DCHECK(sequence_checker_.CalledOnValidSequencedThread()) | 26 DCHECK(sequence_checker_.CalledOnValidSequence()) |
27 << "WeakPtrs must be checked on the same sequenced thread."; | 27 << "WeakPtrs must be checked on the same sequenced thread."; |
28 return is_valid_; | 28 return is_valid_; |
29 } | 29 } |
30 | 30 |
31 WeakReference::Flag::~Flag() { | 31 WeakReference::Flag::~Flag() { |
32 } | 32 } |
33 | 33 |
34 WeakReference::WeakReference() { | 34 WeakReference::WeakReference() { |
35 } | 35 } |
36 | 36 |
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72 } | 72 } |
73 | 73 |
74 WeakPtrBase::~WeakPtrBase() { | 74 WeakPtrBase::~WeakPtrBase() { |
75 } | 75 } |
76 | 76 |
77 WeakPtrBase::WeakPtrBase(const WeakReference& ref) : ref_(ref) { | 77 WeakPtrBase::WeakPtrBase(const WeakReference& ref) : ref_(ref) { |
78 } | 78 } |
79 | 79 |
80 } // namespace internal | 80 } // namespace internal |
81 } // namespace base | 81 } // namespace base |
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