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| 1 // This file was GENERATED by command: | |
| 2 // pump.py callback.h.pump | |
| 3 // DO NOT EDIT BY HAND!!! | |
| 4 | |
| 5 /* | |
| 6 * Copyright 2012 The WebRTC Project Authors. All rights reserved. | |
| 7 * | |
| 8 * Use of this source code is governed by a BSD-style license | |
| 9 * that can be found in the LICENSE file in the root of the source | |
| 10 * tree. An additional intellectual property rights grant can be found | |
| 11 * in the file PATENTS. All contributing project authors may | |
| 12 * be found in the AUTHORS file in the root of the source tree. | |
| 13 */ | |
| 14 | |
| 15 // To generate callback.h from callback.h.pump, execute: | |
| 16 // /home/build/google3/third_party/gtest/scripts/pump.py callback.h.pump | |
| 17 | |
| 18 // Callbacks are callable object containers. They can hold a function pointer | |
| 19 // or a function object and behave like a value type. Internally, data is | |
| 20 // reference-counted, making copies and pass-by-value inexpensive. | |
| 21 // | |
| 22 // Callbacks are typed using template arguments. The format is: | |
| 23 // CallbackN<ReturnType, ParamType1, ..., ParamTypeN> | |
| 24 // where N is the number of arguments supplied to the callable object. | |
| 25 // Callbacks are invoked using operator(), just like a function or a function | |
| 26 // object. Default-constructed callbacks are "empty," and executing an empty | |
| 27 // callback does nothing. A callback can be made empty by assigning it from | |
| 28 // a default-constructed callback. | |
| 29 // | |
| 30 // Callbacks are similar in purpose to std::function (which isn't available on | |
| 31 // all platforms we support) and a lightweight alternative to sigslots. Since | |
| 32 // they effectively hide the type of the object they call, they're useful in | |
| 33 // breaking dependencies between objects that need to interact with one another. | |
| 34 // Notably, they can hold the results of Bind(), std::bind*, etc, without | |
| 35 // needing | |
| 36 // to know the resulting object type of those calls. | |
| 37 // | |
| 38 // Sigslots, on the other hand, provide a fuller feature set, such as multiple | |
| 39 // subscriptions to a signal, optional thread-safety, and lifetime tracking of | |
| 40 // slots. When these features are needed, choose sigslots. | |
| 41 // | |
| 42 // Example: | |
| 43 // int sqr(int x) { return x * x; } | |
| 44 // struct AddK { | |
| 45 // int k; | |
| 46 // int operator()(int x) const { return x + k; } | |
| 47 // } add_k = {5}; | |
| 48 // | |
| 49 // Callback1<int, int> my_callback; | |
| 50 // cout << my_callback.empty() << endl; // true | |
| 51 // | |
| 52 // my_callback = Callback1<int, int>(&sqr); | |
| 53 // cout << my_callback.empty() << endl; // false | |
| 54 // cout << my_callback(3) << endl; // 9 | |
| 55 // | |
| 56 // my_callback = Callback1<int, int>(add_k); | |
| 57 // cout << my_callback(10) << endl; // 15 | |
| 58 // | |
| 59 // my_callback = Callback1<int, int>(); | |
| 60 // cout << my_callback.empty() << endl; // true | |
| 61 | |
| 62 #ifndef WEBRTC_BASE_CALLBACK_H_ | |
| 63 #define WEBRTC_BASE_CALLBACK_H_ | |
| 64 | |
| 65 | |
| 66 // This header is deprecated and is just left here temporarily during | |
| 67 // refactoring. See https://bugs.webrtc.org/7634 for more details. | |
| 68 #include "webrtc/rtc_base/callback.h" | |
| 69 | |
| 70 #endif // WEBRTC_BASE_CALLBACK_H_ | |
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Chromium Code Reviews
Issue 2976293002:
Remove remains of webrtc/base (Closed)
