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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 #ifndef BASE_THREADING_THREAD_CHECKER_IMPL_H_ | 5 #ifndef BASE_THREADING_THREAD_CHECKER_IMPL_H_ |
6 #define BASE_THREADING_THREAD_CHECKER_IMPL_H_ | 6 #define BASE_THREADING_THREAD_CHECKER_IMPL_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include "base/base_api.h" | 9 #include "base/base_export.h" |
10 #include "base/synchronization/lock.h" | 10 #include "base/synchronization/lock.h" |
11 #include "base/threading/platform_thread.h" | 11 #include "base/threading/platform_thread.h" |
12 | 12 |
13 namespace base { | 13 namespace base { |
14 | 14 |
15 // Real implementation of ThreadChecker, for use in debug mode, or | 15 // Real implementation of ThreadChecker, for use in debug mode, or |
16 // for temporary use in release mode (e.g. to CHECK on a threading issue | 16 // for temporary use in release mode (e.g. to CHECK on a threading issue |
17 // seen only in the wild). | 17 // seen only in the wild). |
18 // | 18 // |
19 // Note: You should almost always use the ThreadChecker class to get the | 19 // Note: You should almost always use the ThreadChecker class to get the |
20 // right version for your build configuration. | 20 // right version for your build configuration. |
21 class BASE_API ThreadCheckerImpl { | 21 class BASE_EXPORT ThreadCheckerImpl { |
22 public: | 22 public: |
23 ThreadCheckerImpl(); | 23 ThreadCheckerImpl(); |
24 ~ThreadCheckerImpl(); | 24 ~ThreadCheckerImpl(); |
25 | 25 |
26 bool CalledOnValidThread() const; | 26 bool CalledOnValidThread() const; |
27 | 27 |
28 // Changes the thread that is checked for in CalledOnValidThread. This may | 28 // Changes the thread that is checked for in CalledOnValidThread. This may |
29 // be useful when an object may be created on one thread and then used | 29 // be useful when an object may be created on one thread and then used |
30 // exclusively on another thread. | 30 // exclusively on another thread. |
31 void DetachFromThread(); | 31 void DetachFromThread(); |
32 | 32 |
33 private: | 33 private: |
34 void EnsureThreadIdAssigned() const; | 34 void EnsureThreadIdAssigned() const; |
35 | 35 |
36 mutable base::Lock lock_; | 36 mutable base::Lock lock_; |
37 // This is mutable so that CalledOnValidThread can set it. | 37 // This is mutable so that CalledOnValidThread can set it. |
38 // It's guarded by |lock_|. | 38 // It's guarded by |lock_|. |
39 mutable PlatformThreadId valid_thread_id_; | 39 mutable PlatformThreadId valid_thread_id_; |
40 }; | 40 }; |
41 | 41 |
42 } // namespace base | 42 } // namespace base |
43 | 43 |
44 #endif // BASE_THREADING_THREAD_CHECKER_IMPL_H_ | 44 #endif // BASE_THREADING_THREAD_CHECKER_IMPL_H_ |
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