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| 1 /* | 1 /* |
| 2 * Copyright 2012 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2012 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_RATELIMITER_H_ | 11 #ifndef WEBRTC_BASE_RATELIMITER_H_ |
| 12 #define WEBRTC_BASE_RATELIMITER_H_ | 12 #define WEBRTC_BASE_RATELIMITER_H_ |
| 13 | 13 |
| 14 #include <stddef.h> | |
| 15 | 14 |
| 16 namespace rtc { | 15 // This header is deprecated and is just left here temporarily during |
| 17 | 16 // refactoring. See https://bugs.webrtc.org/7634 for more details. |
| 18 // Limits the rate of use to a certain maximum quantity per period of | 17 #include "webrtc/rtc_base/ratelimiter.h" |
| 19 // time. Use, for example, for simple bandwidth throttling. | |
| 20 // | |
| 21 // It's implemented like a diet plan: You have so many calories per | |
| 22 // day. If you hit the limit, you can't eat any more until the next | |
| 23 // day. | |
| 24 class RateLimiter { | |
| 25 public: | |
| 26 // For example, 100kb per second. | |
| 27 RateLimiter(size_t max, double period) | |
| 28 : max_per_period_(max), | |
| 29 period_length_(period), | |
| 30 used_in_period_(0), | |
| 31 period_start_(0.0), | |
| 32 period_end_(period) { | |
| 33 } | |
| 34 virtual ~RateLimiter() {} | |
| 35 | |
| 36 // Returns true if if the desired quantity is available in the | |
| 37 // current period (< (max - used)). Once the given time passes the | |
| 38 // end of the period, used is set to zero and more use is available. | |
| 39 bool CanUse(size_t desired, double time); | |
| 40 // Increment the quantity used this period. If past the end of a | |
| 41 // period, a new period is started. | |
| 42 void Use(size_t used, double time); | |
| 43 | |
| 44 size_t used_in_period() const { | |
| 45 return used_in_period_; | |
| 46 } | |
| 47 | |
| 48 size_t max_per_period() const { | |
| 49 return max_per_period_; | |
| 50 } | |
| 51 | |
| 52 private: | |
| 53 size_t max_per_period_; | |
| 54 double period_length_; | |
| 55 size_t used_in_period_; | |
| 56 double period_start_; | |
| 57 double period_end_; | |
| 58 }; | |
| 59 | |
| 60 } // namespace rtc | |
| 61 | 18 |
| 62 #endif // WEBRTC_BASE_RATELIMITER_H_ | 19 #endif // WEBRTC_BASE_RATELIMITER_H_ |
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