The Tor Browser / file comparison
comparison: security/sandbox/chromium/base/sequence_checker.h
security/sandbox/chromium/base/sequence_checker.h
- branch
- TOR_BUG_9701
- changeset 3
- 141e0f1194b1
equal
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| -1:000000000000 | 0:77476e0dd155 |
|---|---|
| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef BASE_SEQUENCE_CHECKER_H_ | |
| 6 #define BASE_SEQUENCE_CHECKER_H_ | |
| 7 | |
| 8 #include "base/memory/ref_counted.h" | |
| 9 | |
| 10 // See comments for the similar block in thread_checker.h. | |
| 11 #if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) | |
| 12 #define ENABLE_SEQUENCE_CHECKER 1 | |
| 13 #else | |
| 14 #define ENABLE_SEQUENCE_CHECKER 0 | |
| 15 #endif | |
| 16 | |
| 17 #if ENABLE_SEQUENCE_CHECKER | |
| 18 #include "base/sequence_checker_impl.h" | |
| 19 #endif | |
| 20 | |
| 21 namespace base { | |
| 22 | |
| 23 class SequencedTaskRunner; | |
| 24 | |
| 25 // Do nothing implementation, for use in release mode. | |
| 26 // | |
| 27 // Note: You should almost always use the SequenceChecker class to get | |
| 28 // the right version for your build configuration. | |
| 29 class SequenceCheckerDoNothing { | |
| 30 public: | |
| 31 bool CalledOnValidSequencedThread() const { | |
| 32 return true; | |
| 33 } | |
| 34 | |
| 35 void DetachFromSequence() {} | |
| 36 }; | |
| 37 | |
| 38 // SequenceChecker is a helper class used to help verify that some | |
| 39 // methods of a class are called in sequence -- that is, called from | |
| 40 // the same SequencedTaskRunner. It is a generalization of | |
| 41 // ThreadChecker; see comments in sequence_checker_impl.h for details. | |
| 42 // | |
| 43 // Example: | |
| 44 // class MyClass { | |
| 45 // public: | |
| 46 // void Foo() { | |
| 47 // DCHECK(sequence_checker_.CalledOnValidSequence()); | |
| 48 // ... (do stuff) ... | |
| 49 // } | |
| 50 // | |
| 51 // private: | |
| 52 // SequenceChecker sequence_checker_; | |
| 53 // } | |
| 54 // | |
| 55 // In Release mode, CalledOnValidSequence will always return true. | |
| 56 #if ENABLE_SEQUENCE_CHECKER | |
| 57 class SequenceChecker : public SequenceCheckerImpl { | |
| 58 }; | |
| 59 #else | |
| 60 class SequenceChecker : public SequenceCheckerDoNothing { | |
| 61 }; | |
| 62 #endif // ENABLE_SEQUENCE_CHECKER | |
| 63 | |
| 64 #undef ENABLE_SEQUENCE_CHECKER | |
| 65 | |
| 66 } // namespace base | |
| 67 | |
| 68 #endif // BASE_SEQUENCE_CHECKER_H_ |
