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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 #ifndef BASE_THREADING_THREAD_CHECKER_H_ | 5 #ifndef BASE_THREADING_THREAD_CHECKER_H_ |
6 #define BASE_THREADING_THREAD_CHECKER_H_ | 6 #define BASE_THREADING_THREAD_CHECKER_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #ifndef NDEBUG | 9 #ifndef NDEBUG |
10 #include "base/lock.h" | 10 #include "base/synchronization/lock.h" |
11 #include "base/threading/platform_thread.h" | 11 #include "base/threading/platform_thread.h" |
12 #endif // NDEBUG | 12 #endif // NDEBUG |
13 | 13 |
14 namespace base { | 14 namespace base { |
15 | 15 |
16 // Before using this class, please consider using NonThreadSafe as it | 16 // Before using this class, please consider using NonThreadSafe as it |
17 // makes it much easier to determine the nature of your class. | 17 // makes it much easier to determine the nature of your class. |
18 // | 18 // |
19 // A helper class used to help verify that some methods of a class are | 19 // A helper class used to help verify that some methods of a class are |
20 // called from the same thread. One can inherit from this class and use | 20 // called from the same thread. One can inherit from this class and use |
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44 bool CalledOnValidThread() const; | 44 bool CalledOnValidThread() const; |
45 | 45 |
46 // Changes the thread that is checked for in CalledOnValidThread. This may | 46 // Changes the thread that is checked for in CalledOnValidThread. This may |
47 // be useful when an object may be created on one thread and then used | 47 // be useful when an object may be created on one thread and then used |
48 // exclusively on another thread. | 48 // exclusively on another thread. |
49 void DetachFromThread(); | 49 void DetachFromThread(); |
50 | 50 |
51 private: | 51 private: |
52 void EnsureThreadIdAssigned() const; | 52 void EnsureThreadIdAssigned() const; |
53 | 53 |
54 mutable Lock lock_; | 54 mutable base::Lock lock_; |
55 // This is mutable so that CalledOnValidThread can set it. | 55 // This is mutable so that CalledOnValidThread can set it. |
56 // It's guarded by |lock_|. | 56 // It's guarded by |lock_|. |
57 mutable PlatformThreadId valid_thread_id_; | 57 mutable PlatformThreadId valid_thread_id_; |
58 }; | 58 }; |
59 #else | 59 #else |
60 // Do nothing in release mode. | 60 // Do nothing in release mode. |
61 class ThreadChecker { | 61 class ThreadChecker { |
62 public: | 62 public: |
63 bool CalledOnValidThread() const { | 63 bool CalledOnValidThread() const { |
64 return true; | 64 return true; |
65 } | 65 } |
66 | 66 |
67 void DetachFromThread() {} | 67 void DetachFromThread() {} |
68 }; | 68 }; |
69 #endif // NDEBUG | 69 #endif // NDEBUG |
70 | 70 |
71 } // namespace base | 71 } // namespace base |
72 | 72 |
73 #endif // BASE_THREADING_THREAD_CHECKER_H_ | 73 #endif // BASE_THREADING_THREAD_CHECKER_H_ |
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