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comparison: media/mtransport/simpletokenbucket.h
media/mtransport/simpletokenbucket.h
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=2 et sw=2 tw=80: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 5 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 /* Original author: bcampen@mozilla.com */ | |
| 8 | |
| 9 /* | |
| 10 * This file defines a dirt-simple token bucket class. | |
| 11 */ | |
| 12 | |
| 13 #ifndef simpletokenbucket_h__ | |
| 14 #define simpletokenbucket_h__ | |
| 15 | |
| 16 #include <stdint.h> | |
| 17 | |
| 18 #include "prinrval.h" | |
| 19 | |
| 20 #include "m_cpp_utils.h" | |
| 21 | |
| 22 namespace mozilla { | |
| 23 | |
| 24 class SimpleTokenBucket { | |
| 25 public: | |
| 26 /* | |
| 27 * Create a SimpleTokenBucket with a given maximum size and | |
| 28 * token replenishment rate. | |
| 29 * (eg; if you want a maximum rate of 5 per second over a 7 second | |
| 30 * period, call SimpleTokenBucket b(5*7, 5);) | |
| 31 */ | |
| 32 SimpleTokenBucket(size_t bucket_size, size_t tokens_per_second); | |
| 33 | |
| 34 /* | |
| 35 * Attempt to acquire a number of tokens. If successful, returns | |
| 36 * |num_tokens|, otherwise returns the number of tokens currently | |
| 37 * in the bucket. | |
| 38 * Note: To get the number of tokens in the bucket, pass something | |
| 39 * like UINT32_MAX. | |
| 40 */ | |
| 41 size_t getTokens(size_t num_tokens); | |
| 42 | |
| 43 protected: // Allow testing to touch these. | |
| 44 uint64_t max_tokens_; | |
| 45 uint64_t num_tokens_; | |
| 46 size_t tokens_per_second_; | |
| 47 PRIntervalTime last_time_tokens_added_; | |
| 48 | |
| 49 DISALLOW_COPY_ASSIGN(SimpleTokenBucket); | |
| 50 }; | |
| 51 } // namespace mozilla | |
| 52 | |
| 53 #endif // simpletokenbucket_h__ | |
| 54 |
