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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 // This defines helpful methods for dealing with Callbacks. Because Callbacks | 5 // This defines helpful methods for dealing with Callbacks. Because Callbacks |
6 // are implemented using templates, with a class per callback signature, adding | 6 // are implemented using templates, with a class per callback signature, adding |
7 // methods to Callback<> itself is unattractive (lots of extra code gets | 7 // methods to Callback<> itself is unattractive (lots of extra code gets |
8 // generated). Instead, consider adding methods here. | 8 // generated). Instead, consider adding methods here. |
9 // | 9 // |
10 // ResetAndReturn(&cb) is like cb.Reset() but allows executing a callback (via a | 10 // ResetAndReturn(&cb) is like cb.Reset() but allows executing a callback (via a |
(...skipping 19 matching lines...) Expand all Loading... | |
30 // ScopedClosureRunner is akin to std::unique_ptr<> for Closures. It ensures | 30 // ScopedClosureRunner is akin to std::unique_ptr<> for Closures. It ensures |
31 // that the Closure is executed no matter how the current scope exits. | 31 // that the Closure is executed no matter how the current scope exits. |
32 class BASE_EXPORT ScopedClosureRunner { | 32 class BASE_EXPORT ScopedClosureRunner { |
33 public: | 33 public: |
34 ScopedClosureRunner(); | 34 ScopedClosureRunner(); |
35 explicit ScopedClosureRunner(const Closure& closure); | 35 explicit ScopedClosureRunner(const Closure& closure); |
36 ~ScopedClosureRunner(); | 36 ~ScopedClosureRunner(); |
37 | 37 |
38 ScopedClosureRunner(ScopedClosureRunner&& other); | 38 ScopedClosureRunner(ScopedClosureRunner&& other); |
39 | 39 |
40 // Calls the current closure if it's set and replaces it with the closure from | 40 // Releases the current closure if it's set and replaces it with the closure |
danakj
2016/06/27 22:49:57
It dchecks there's no closure, so this should say
Sergey Ulanov
2016/06/28 19:15:57
Done.
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41 // |other|. | 41 // from |other|. |
42 ScopedClosureRunner& operator=(ScopedClosureRunner&& other); | 42 ScopedClosureRunner& operator=(ScopedClosureRunner&& other); |
43 | 43 |
44 // Calls the current closure and resets it, so it wont be called again. | 44 // Calls the current closure and resets it, so it wont be called again. |
45 void Reset(); | 45 void RunNow(); |
46 | 46 |
47 // Calls the current closure and replaces it with the new one. | 47 // Replaces closure with the new one releasing the old one without calling it. |
danakj
2016/06/27 22:49:57
The comment says it won't run it but the code does
Sergey Ulanov
2016/06/28 19:15:57
Duh, yes, sorry
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48 void Reset(const Closure& closure); | 48 void ReplaceClosure(const Closure& closure); |
49 | 49 |
50 // Releases the Closure without calling. | 50 // Releases the Closure without calling. |
51 Closure Release() WARN_UNUSED_RESULT; | 51 Closure Release() WARN_UNUSED_RESULT; |
52 | 52 |
53 private: | 53 private: |
54 Closure closure_; | 54 Closure closure_; |
55 | 55 |
56 DISALLOW_COPY_AND_ASSIGN(ScopedClosureRunner); | 56 DISALLOW_COPY_AND_ASSIGN(ScopedClosureRunner); |
57 }; | 57 }; |
58 | 58 |
59 } // namespace base | 59 } // namespace base |
60 | 60 |
61 #endif // BASE_CALLBACK_HELPERS_H_ | 61 #endif // BASE_CALLBACK_HELPERS_H_ |
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