OLD | NEW |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_ | 5 #ifndef BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_ |
6 #define BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_ | 6 #define BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <map> | 10 #include <map> |
(...skipping 48 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
59 // iterator, the steps can be performed separately. Call PerpareDelta() | 59 // iterator, the steps can be performed separately. Call PerpareDelta() |
60 // as many times as necessary with a single StartDeltas() before and | 60 // as many times as necessary with a single StartDeltas() before and |
61 // a single FinishDeltas() after. All passed histograms must live | 61 // a single FinishDeltas() after. All passed histograms must live |
62 // until FinishDeltas() completes. PrepareAbsolute() works the same | 62 // until FinishDeltas() completes. PrepareAbsolute() works the same |
63 // but assumes there were no previous logged values and no future deltas | 63 // but assumes there were no previous logged values and no future deltas |
64 // will be created (and thus can work on read-only histograms). | 64 // will be created (and thus can work on read-only histograms). |
65 // Use Prepare*TakingOwnership() if it is desireable to have this class | 65 // Use Prepare*TakingOwnership() if it is desireable to have this class |
66 // automatically delete the histogram once it is "finished". | 66 // automatically delete the histogram once it is "finished". |
67 void StartDeltas(); | 67 void StartDeltas(); |
68 void PrepareDelta(HistogramBase* histogram); | 68 void PrepareDelta(HistogramBase* histogram); |
69 void PrepareDeltaTakingOwnership(scoped_ptr<HistogramBase> histogram); | 69 void PrepareDeltaTakingOwnership(std::unique_ptr<HistogramBase> histogram); |
70 void PrepareAbsolute(const HistogramBase* histogram); | 70 void PrepareAbsolute(const HistogramBase* histogram); |
71 void PrepareAbsoluteTakingOwnership( | 71 void PrepareAbsoluteTakingOwnership( |
72 scoped_ptr<const HistogramBase> histogram); | 72 std::unique_ptr<const HistogramBase> histogram); |
73 void FinishDeltas(); | 73 void FinishDeltas(); |
74 | 74 |
75 private: | 75 private: |
76 FRIEND_TEST_ALL_PREFIXES(HistogramSnapshotManagerTest, CheckMerge); | 76 FRIEND_TEST_ALL_PREFIXES(HistogramSnapshotManagerTest, CheckMerge); |
77 | 77 |
78 // During a snapshot, samples are acquired and aggregated. This structure | 78 // During a snapshot, samples are acquired and aggregated. This structure |
79 // contains all the information collected for a given histogram. Once a | 79 // contains all the information collected for a given histogram. Once a |
80 // snapshot operation is finished, it is generally emptied except for | 80 // snapshot operation is finished, it is generally emptied except for |
81 // information that must persist from one report to the next, such as | 81 // information that must persist from one report to the next, such as |
82 // the "inconsistencies". | 82 // the "inconsistencies". |
(...skipping 10 matching lines...) Expand all Loading... |
93 HistogramSamples* accumulated_samples = nullptr; | 93 HistogramSamples* accumulated_samples = nullptr; |
94 | 94 |
95 // The set of inconsistencies (flags) already seen for the histogram. | 95 // The set of inconsistencies (flags) already seen for the histogram. |
96 // See HistogramBase::Inconsistency for values. | 96 // See HistogramBase::Inconsistency for values. |
97 uint32_t inconsistencies = 0; | 97 uint32_t inconsistencies = 0; |
98 }; | 98 }; |
99 | 99 |
100 // Capture and hold samples from a histogram. This does all the heavy | 100 // Capture and hold samples from a histogram. This does all the heavy |
101 // lifting for PrepareDelta() and PrepareAbsolute(). | 101 // lifting for PrepareDelta() and PrepareAbsolute(). |
102 void PrepareSamples(const HistogramBase* histogram, | 102 void PrepareSamples(const HistogramBase* histogram, |
103 scoped_ptr<HistogramSamples> samples); | 103 std::unique_ptr<HistogramSamples> samples); |
104 | 104 |
105 // Try to detect and fix count inconsistency of logged samples. | 105 // Try to detect and fix count inconsistency of logged samples. |
106 void InspectLoggedSamplesInconsistency( | 106 void InspectLoggedSamplesInconsistency( |
107 const HistogramSamples& new_snapshot, | 107 const HistogramSamples& new_snapshot, |
108 HistogramSamples* logged_samples); | 108 HistogramSamples* logged_samples); |
109 | 109 |
110 // For histograms, track what has been previously seen, indexed | 110 // For histograms, track what has been previously seen, indexed |
111 // by the hash of the histogram name. | 111 // by the hash of the histogram name. |
112 std::map<uint64_t, SampleInfo> known_histograms_; | 112 std::map<uint64_t, SampleInfo> known_histograms_; |
113 | 113 |
114 // Collection of histograms of which ownership has been passed to this | 114 // Collection of histograms of which ownership has been passed to this |
115 // object. They will be deleted by FinishDeltas(). | 115 // object. They will be deleted by FinishDeltas(). |
116 std::vector<scoped_ptr<const HistogramBase>> owned_histograms_; | 116 std::vector<std::unique_ptr<const HistogramBase>> owned_histograms_; |
117 | 117 |
118 // Indicates if deltas are currently being prepared. | 118 // Indicates if deltas are currently being prepared. |
119 bool preparing_deltas_; | 119 bool preparing_deltas_; |
120 | 120 |
121 // |histogram_flattener_| handles the logistics of recording the histogram | 121 // |histogram_flattener_| handles the logistics of recording the histogram |
122 // deltas. | 122 // deltas. |
123 HistogramFlattener* histogram_flattener_; // Weak. | 123 HistogramFlattener* histogram_flattener_; // Weak. |
124 | 124 |
125 DISALLOW_COPY_AND_ASSIGN(HistogramSnapshotManager); | 125 DISALLOW_COPY_AND_ASSIGN(HistogramSnapshotManager); |
126 }; | 126 }; |
127 | 127 |
128 } // namespace base | 128 } // namespace base |
129 | 129 |
130 #endif // BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_ | 130 #endif // BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_ |
OLD | NEW |