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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> |
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29 public: | 29 public: |
30 explicit HistogramSnapshotManager(HistogramFlattener* histogram_flattener); | 30 explicit HistogramSnapshotManager(HistogramFlattener* histogram_flattener); |
31 virtual ~HistogramSnapshotManager(); | 31 virtual ~HistogramSnapshotManager(); |
32 | 32 |
33 // Snapshot all histograms, and ask |histogram_flattener_| to record the | 33 // Snapshot all histograms, and ask |histogram_flattener_| to record the |
34 // delta. |flags_to_set| is used to set flags for each histogram. | 34 // delta. |flags_to_set| is used to set flags for each histogram. |
35 // |required_flags| is used to select histograms to be recorded. | 35 // |required_flags| is used to select histograms to be recorded. |
36 // Only histograms that have all the flags specified by the argument will be | 36 // Only histograms that have all the flags specified by the argument will be |
37 // chosen. If all histograms should be recorded, set it to | 37 // chosen. If all histograms should be recorded, set it to |
38 // |Histogram::kNoFlags|. | 38 // |Histogram::kNoFlags|. |
39 void PrepareDeltas(HistogramBase::Flags flags_to_set, | 39 template <class ForwardHistogramIterator> |
40 HistogramBase::Flags required_flags); | 40 void PrepareDeltas(ForwardHistogramIterator begin, |
| 41 ForwardHistogramIterator end, |
| 42 HistogramBase::Flags flags_to_set, |
| 43 HistogramBase::Flags required_flags) { |
| 44 for (ForwardHistogramIterator it = begin; it != end; ++it) { |
| 45 (*it)->SetFlags(flags_to_set); |
| 46 if (((*it)->flags() & required_flags) == required_flags) |
| 47 PrepareDelta(**it); |
| 48 } |
| 49 } |
41 | 50 |
42 private: | 51 private: |
43 // Snapshot this histogram, and record the delta. | 52 // Snapshot this histogram, and record the delta. |
44 void PrepareDelta(const HistogramBase& histogram); | 53 void PrepareDelta(const HistogramBase& histogram); |
45 | 54 |
46 // Try to detect and fix count inconsistency of logged samples. | 55 // Try to detect and fix count inconsistency of logged samples. |
47 void InspectLoggedSamplesInconsistency( | 56 void InspectLoggedSamplesInconsistency( |
48 const HistogramSamples& new_snapshot, | 57 const HistogramSamples& new_snapshot, |
49 HistogramSamples* logged_samples); | 58 HistogramSamples* logged_samples); |
50 | 59 |
51 // For histograms, track what we've already recorded (as a sample for | 60 // For histograms, track what we've already recorded (as a sample for |
52 // each histogram) so that we can record only the delta with the next log. | 61 // each histogram) so that we can record only the delta with the next log. |
53 // The information is indexed by the hash of the histogram name. | 62 // The information is indexed by the hash of the histogram name. |
54 std::map<uint64_t, HistogramSamples*> logged_samples_; | 63 std::map<uint64_t, HistogramSamples*> logged_samples_; |
55 | 64 |
56 // Set of histograms found to be corrupt and their problems, indexed | 65 // Set of histograms found to be corrupt and their problems, indexed |
57 // by the hash of the histogram name. | 66 // by the hash of the histogram name. |
58 std::map<uint64_t, int> inconsistencies_; | 67 std::map<uint64_t, int> inconsistencies_; |
59 | 68 |
60 // |histogram_flattener_| handles the logistics of recording the histogram | 69 // |histogram_flattener_| handles the logistics of recording the histogram |
61 // deltas. | 70 // deltas. |
62 HistogramFlattener* histogram_flattener_; // Weak. | 71 HistogramFlattener* histogram_flattener_; // Weak. |
63 | 72 |
64 DISALLOW_COPY_AND_ASSIGN(HistogramSnapshotManager); | 73 DISALLOW_COPY_AND_ASSIGN(HistogramSnapshotManager); |
65 }; | 74 }; |
66 | 75 |
67 } // namespace base | 76 } // namespace base |
68 | 77 |
69 #endif // BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_ | 78 #endif // BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_ |
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