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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 NET_NQE_NETWORK_QUALITY_OBSERVATION_H_ | 5 #ifndef NET_NQE_NETWORK_QUALITY_OBSERVATION_H_ |
6 #define NET_NQE_NETWORK_QUALITY_OBSERVATION_H_ | 6 #define NET_NQE_NETWORK_QUALITY_OBSERVATION_H_ |
7 | 7 |
| 8 #include <stdint.h> |
| 9 |
8 #include <vector> | 10 #include <vector> |
9 | 11 |
10 #include "base/gtest_prod_util.h" | 12 #include "base/gtest_prod_util.h" |
11 #include "base/macros.h" | 13 #include "base/macros.h" |
| 14 #include "base/optional.h" |
12 #include "base/time/time.h" | 15 #include "base/time/time.h" |
13 #include "net/base/net_export.h" | 16 #include "net/base/net_export.h" |
14 #include "net/nqe/network_quality_observation_source.h" | 17 #include "net/nqe/network_quality_observation_source.h" |
15 | 18 |
16 namespace net { | 19 namespace net { |
17 | 20 |
18 namespace nqe { | 21 namespace nqe { |
19 | 22 |
20 namespace internal { | 23 namespace internal { |
21 | 24 |
22 // Records observations of network quality metrics (such as round trip time | 25 // Records observations of network quality metrics (such as round trip time |
23 // or throughput), along with the time the observation was made. Observations | 26 // or throughput), along with the time the observation was made. Observations |
24 // can be made at several places in the network stack, thus the observation | 27 // can be made at several places in the network stack, thus the observation |
25 // source is provided as well. ValueType must be numerical so that statistics | 28 // source is provided as well. ValueType must be numerical so that statistics |
26 // such as median, average can be computed. | 29 // such as median, average can be computed. |
27 template <typename ValueType> | 30 template <typename ValueType> |
28 struct NET_EXPORT_PRIVATE Observation { | 31 struct NET_EXPORT_PRIVATE Observation { |
29 Observation(const ValueType& value, | 32 Observation(const ValueType& value, |
30 base::TimeTicks timestamp, | 33 base::TimeTicks timestamp, |
31 int32_t signal_strength_dbm, | 34 const base::Optional<int32_t>& signal_strength, |
32 NetworkQualityObservationSource source) | 35 NetworkQualityObservationSource source) |
33 : value(value), | 36 : value(value), |
34 timestamp(timestamp), | 37 timestamp(timestamp), |
35 signal_strength_dbm(signal_strength_dbm), | 38 signal_strength(signal_strength), |
36 source(source) { | 39 source(source) { |
37 DCHECK(!timestamp.is_null()); | 40 DCHECK(!timestamp.is_null()); |
38 } | 41 } |
39 ~Observation() {} | 42 ~Observation() {} |
40 | 43 |
41 // Value of the observation. | 44 // Value of the observation. |
42 const ValueType value; | 45 const ValueType value; |
43 | 46 |
44 // Time when the observation was taken. | 47 // Time when the observation was taken. |
45 const base::TimeTicks timestamp; | 48 const base::TimeTicks timestamp; |
46 | 49 |
47 // Signal strength (in dBm) when the observation was taken. Set to INT32_MIN | 50 // Signal strength when the observation was taken. |
48 // if the signal strength is unavailable. | 51 const base::Optional<int32_t> signal_strength; |
49 const int32_t signal_strength_dbm; | |
50 | 52 |
51 // The source of the observation. | 53 // The source of the observation. |
52 const NetworkQualityObservationSource source; | 54 const NetworkQualityObservationSource source; |
53 }; | 55 }; |
54 | 56 |
55 } // namespace internal | 57 } // namespace internal |
56 | 58 |
57 } // namespace nqe | 59 } // namespace nqe |
58 | 60 |
59 } // namespace net | 61 } // namespace net |
60 | 62 |
61 #endif // NET_NQE_NETWORK_QUALITY_OBSERVATION_H_ | 63 #endif // NET_NQE_NETWORK_QUALITY_OBSERVATION_H_ |
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