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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/ref_counted.h" | 5 #include "base/memory/ref_counted.h" |
6 | 6 |
7 #include "base/threading/thread_collision_warner.h" | 7 #include "base/threading/thread_collision_warner.h" |
8 | 8 |
9 namespace base { | 9 namespace base { |
10 namespace { | 10 namespace { |
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21 return AtomicRefCountIsOne(&ref_count_); | 21 return AtomicRefCountIsOne(&ref_count_); |
22 } | 22 } |
23 | 23 |
24 RefCountedThreadSafeBase::~RefCountedThreadSafeBase() { | 24 RefCountedThreadSafeBase::~RefCountedThreadSafeBase() { |
25 #if DCHECK_IS_ON() | 25 #if DCHECK_IS_ON() |
26 DCHECK(in_dtor_) << "RefCountedThreadSafe object deleted without " | 26 DCHECK(in_dtor_) << "RefCountedThreadSafe object deleted without " |
27 "calling Release()"; | 27 "calling Release()"; |
28 #endif | 28 #endif |
29 } | 29 } |
30 | 30 |
31 void RefCountedThreadSafeBase::AddRef() const { | |
32 #if DCHECK_IS_ON() | |
33 DCHECK(!in_dtor_); | |
34 DCHECK(!needs_adopt_ref_) | |
35 << "This RefCounted object is created with non-zero reference count." | |
36 << " The first reference to such a object has to be made by AdoptRef or" | |
37 << " MakeRefCounted."; | |
38 #endif | |
39 AtomicRefCountInc(&ref_count_); | |
40 } | |
41 | |
42 bool RefCountedThreadSafeBase::Release() const { | |
43 #if DCHECK_IS_ON() | |
44 DCHECK(!in_dtor_); | |
45 DCHECK(!AtomicRefCountIsZero(&ref_count_)); | |
46 #endif | |
47 if (!AtomicRefCountDec(&ref_count_)) { | |
48 #if DCHECK_IS_ON() | |
49 in_dtor_ = true; | |
50 #endif | |
51 return true; | |
52 } | |
53 return false; | |
54 } | |
55 | |
56 #if DCHECK_IS_ON() | 31 #if DCHECK_IS_ON() |
57 bool RefCountedBase::CalledOnValidSequence() const { | 32 bool RefCountedBase::CalledOnValidSequence() const { |
58 return sequence_checker_.CalledOnValidSequence() || | 33 return sequence_checker_.CalledOnValidSequence() || |
59 !AtomicRefCountIsZero(&g_cross_thread_ref_count_access_allow_count); | 34 !AtomicRefCountIsZero(&g_cross_thread_ref_count_access_allow_count); |
60 } | 35 } |
61 #endif | 36 #endif |
62 | 37 |
63 } // namespace subtle | 38 } // namespace subtle |
64 | 39 |
65 #if DCHECK_IS_ON() | 40 #if DCHECK_IS_ON() |
66 ScopedAllowCrossThreadRefCountAccess::ScopedAllowCrossThreadRefCountAccess() { | 41 ScopedAllowCrossThreadRefCountAccess::ScopedAllowCrossThreadRefCountAccess() { |
67 AtomicRefCountInc(&g_cross_thread_ref_count_access_allow_count); | 42 AtomicRefCountInc(&g_cross_thread_ref_count_access_allow_count); |
68 } | 43 } |
69 | 44 |
70 ScopedAllowCrossThreadRefCountAccess::~ScopedAllowCrossThreadRefCountAccess() { | 45 ScopedAllowCrossThreadRefCountAccess::~ScopedAllowCrossThreadRefCountAccess() { |
71 AtomicRefCountDec(&g_cross_thread_ref_count_access_allow_count); | 46 AtomicRefCountDec(&g_cross_thread_ref_count_access_allow_count); |
72 } | 47 } |
73 #endif | 48 #endif |
74 | 49 |
75 } // namespace base | 50 } // namespace base |
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