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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_NON_THREAD_SAFE_H_ | 5 #ifndef BASE_THREADING_NON_THREAD_SAFE_H_ |
6 #define BASE_THREADING_NON_THREAD_SAFE_H_ | 6 #define BASE_THREADING_NON_THREAD_SAFE_H_ |
7 | 7 |
8 // Classes deriving from NonThreadSafe may need to suppress MSVC warning 4275: | 8 // Classes deriving from NonThreadSafe may need to suppress MSVC warning 4275: |
9 // non dll-interface class 'Bar' used as base for dll-interface class 'Foo'. | 9 // non dll-interface class 'Bar' used as base for dll-interface class 'Foo'. |
10 // There is a specific macro to do it: NON_EXPORTED_BASE(), defined in | 10 // There is a specific macro to do it: NON_EXPORTED_BASE(), defined in |
11 // compiler_specific.h | 11 // compiler_specific.h |
12 #include "base/compiler_specific.h" | 12 #include "base/compiler_specific.h" |
13 | 13 #include "base/logging.h" |
14 // See comment at top of thread_checker.h | |
15 #if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) | |
16 #define ENABLE_NON_THREAD_SAFE 1 | |
17 #else | |
18 #define ENABLE_NON_THREAD_SAFE 0 | |
19 #endif | |
20 | |
21 #include "base/threading/non_thread_safe_impl.h" | 14 #include "base/threading/non_thread_safe_impl.h" |
22 | 15 |
23 namespace base { | 16 namespace base { |
24 | 17 |
25 // Do nothing implementation of NonThreadSafe, for release mode. | 18 // Do nothing implementation of NonThreadSafe, for release mode. |
26 // | 19 // |
27 // Note: You should almost always use the NonThreadSafe class to get | 20 // Note: You should almost always use the NonThreadSafe class to get |
28 // the right version of the class for your build configuration. | 21 // the right version of the class for your build configuration. |
29 class NonThreadSafeDoNothing { | 22 class NonThreadSafeDoNothing { |
30 public: | 23 public: |
(...skipping 20 matching lines...) Expand all Loading... |
51 // DCHECK(CalledOnValidThread()); | 44 // DCHECK(CalledOnValidThread()); |
52 // ... (do stuff) ... | 45 // ... (do stuff) ... |
53 // } | 46 // } |
54 // } | 47 // } |
55 // | 48 // |
56 // Note that base::ThreadChecker offers identical functionality to | 49 // Note that base::ThreadChecker offers identical functionality to |
57 // NonThreadSafe, but does not require inheritance. In general, it is preferable | 50 // NonThreadSafe, but does not require inheritance. In general, it is preferable |
58 // to have a base::ThreadChecker as a member, rather than inherit from | 51 // to have a base::ThreadChecker as a member, rather than inherit from |
59 // NonThreadSafe. For more details about when to choose one over the other, see | 52 // NonThreadSafe. For more details about when to choose one over the other, see |
60 // the documentation for base::ThreadChecker. | 53 // the documentation for base::ThreadChecker. |
61 #if ENABLE_NON_THREAD_SAFE | 54 #if DCHECK_IS_ON() |
62 typedef NonThreadSafeImpl NonThreadSafe; | 55 typedef NonThreadSafeImpl NonThreadSafe; |
63 #else | 56 #else |
64 typedef NonThreadSafeDoNothing NonThreadSafe; | 57 typedef NonThreadSafeDoNothing NonThreadSafe; |
65 #endif // ENABLE_NON_THREAD_SAFE | 58 #endif // DCHECK_IS_ON() |
66 | |
67 #undef ENABLE_NON_THREAD_SAFE | |
68 | 59 |
69 } // namespace base | 60 } // namespace base |
70 | 61 |
71 #endif // BASE_THREADING_NON_THREAD_SAFE_H_ | 62 #endif // BASE_THREADING_NON_THREAD_SAFE_H_ |
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