OLD | NEW |
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 #ifndef REMOTING_BASE_RATE_COUNTER_H_ | 5 #ifndef REMOTING_BASE_RATE_COUNTER_H_ |
6 #define REMOTING_BASE_RATE_COUNTER_H_ | 6 #define REMOTING_BASE_RATE_COUNTER_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <queue> | 10 #include <queue> |
11 #include <utility> | 11 #include <utility> |
12 | 12 |
13 #include "base/macros.h" | 13 #include "base/macros.h" |
14 #include "base/threading/non_thread_safe.h" | 14 #include "base/sequence_checker.h" |
15 #include "base/time/default_tick_clock.h" | 15 #include "base/time/default_tick_clock.h" |
16 #include "base/time/tick_clock.h" | 16 #include "base/time/tick_clock.h" |
17 #include "base/time/time.h" | 17 #include "base/time/time.h" |
18 | 18 |
19 namespace remoting { | 19 namespace remoting { |
20 | 20 |
21 // Measures average rate per second of a sequence of point rate samples | 21 // Measures average rate per second of a sequence of point rate samples |
22 // over a specified time window. This can be used to measure bandwidth, frame | 22 // over a specified time window. This can be used to measure bandwidth, frame |
23 // rates, etc. | 23 // rates, etc. |
24 class RateCounter : public base::NonThreadSafe { | 24 class RateCounter { |
25 public: | 25 public: |
26 // Constructs a rate counter over the specified |time_window|. | 26 // Constructs a rate counter over the specified |time_window|. |
27 explicit RateCounter(base::TimeDelta time_window); | 27 explicit RateCounter(base::TimeDelta time_window); |
28 virtual ~RateCounter(); | 28 virtual ~RateCounter(); |
29 | 29 |
30 // Records a point event count to include in the rate. | 30 // Records a point event count to include in the rate. |
31 void Record(int64_t value); | 31 void Record(int64_t value); |
32 | 32 |
33 // Returns the rate-per-second of values recorded over the time window. | 33 // Returns the rate-per-second of values recorded over the time window. |
34 // Note that rates reported before |time_window| has elapsed are not accurate. | 34 // Note that rates reported before |time_window| has elapsed are not accurate. |
(...skipping 15 matching lines...) Expand all Loading... |
50 | 50 |
51 // Queue containing data points in the order in which they were recorded. | 51 // Queue containing data points in the order in which they were recorded. |
52 std::queue<DataPoint> data_points_; | 52 std::queue<DataPoint> data_points_; |
53 | 53 |
54 // Sum of values in |data_points_|. | 54 // Sum of values in |data_points_|. |
55 int64_t sum_; | 55 int64_t sum_; |
56 | 56 |
57 base::DefaultTickClock default_tick_clock_; | 57 base::DefaultTickClock default_tick_clock_; |
58 base::TickClock* tick_clock_ = &default_tick_clock_; | 58 base::TickClock* tick_clock_ = &default_tick_clock_; |
59 | 59 |
| 60 SEQUENCE_CHECKER(sequence_checker_); |
| 61 |
60 DISALLOW_COPY_AND_ASSIGN(RateCounter); | 62 DISALLOW_COPY_AND_ASSIGN(RateCounter); |
61 }; | 63 }; |
62 | 64 |
63 } // namespace remoting | 65 } // namespace remoting |
64 | 66 |
65 #endif // REMOTING_BASE_RATE_COUNTER_H_ | 67 #endif // REMOTING_BASE_RATE_COUNTER_H_ |
OLD | NEW |