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| 1 /* | 1 /* |
| 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
| 11 #ifndef WEBRTC_BASE_ONETIMEEVENT_H_ | 11 #ifndef WEBRTC_BASE_ONETIMEEVENT_H_ |
| 12 #define WEBRTC_BASE_ONETIMEEVENT_H_ | 12 #define WEBRTC_BASE_ONETIMEEVENT_H_ |
| 13 | 13 |
| 14 #include "webrtc/base/criticalsection.h" | |
| 15 #include "webrtc/typedefs.h" | |
| 16 | 14 |
| 17 namespace webrtc { | 15 // This header is deprecated and is just left here temporarily during |
| 18 // Provides a simple way to perform an operation (such as logging) one | 16 // refactoring. See https://bugs.webrtc.org/7634 for more details. |
| 19 // time in a certain scope. | 17 #include "webrtc/rtc_base/onetimeevent.h" |
| 20 // Example: | |
| 21 // OneTimeEvent firstFrame; | |
| 22 // ... | |
| 23 // if (firstFrame()) { | |
| 24 // LOG(LS_INFO) << "This is the first frame". | |
| 25 // } | |
| 26 class OneTimeEvent { | |
| 27 public: | |
| 28 OneTimeEvent() {} | |
| 29 bool operator()() { | |
| 30 rtc::CritScope cs(&critsect_); | |
| 31 if (happened_) { | |
| 32 return false; | |
| 33 } | |
| 34 happened_ = true; | |
| 35 return true; | |
| 36 } | |
| 37 | |
| 38 private: | |
| 39 bool happened_ = false; | |
| 40 rtc::CriticalSection critsect_; | |
| 41 }; | |
| 42 | |
| 43 // A non-thread-safe, ligher-weight version of the OneTimeEvent class. | |
| 44 class ThreadUnsafeOneTimeEvent { | |
| 45 public: | |
| 46 ThreadUnsafeOneTimeEvent() {} | |
| 47 bool operator()() { | |
| 48 if (happened_) { | |
| 49 return false; | |
| 50 } | |
| 51 happened_ = true; | |
| 52 return true; | |
| 53 } | |
| 54 | |
| 55 private: | |
| 56 bool happened_ = false; | |
| 57 }; | |
| 58 | |
| 59 } // namespace webrtc | |
| 60 | 18 |
| 61 #endif // WEBRTC_BASE_ONETIMEEVENT_H_ | 19 #endif // WEBRTC_BASE_ONETIMEEVENT_H_ |
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