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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_FLATTENER_H_ | 5 #ifndef BASE_METRICS_HISTOGRAM_FLATTENER_H_ |
6 #define BASE_METRICS_HISTOGRAM_FLATTENER_H_ | 6 #define BASE_METRICS_HISTOGRAM_FLATTENER_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <string> | 9 #include <string> |
10 | 10 |
11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
12 #include "base/metrics/histogram.h" | 12 #include "base/metrics/histogram.h" |
13 | 13 |
14 namespace base { | 14 namespace base { |
15 | 15 |
16 class HistogramSamples; | 16 class HistogramSamples; |
17 | 17 |
18 // HistogramFlattener is an interface used by HistogramSnapshotManager, which | 18 // HistogramFlattener is an interface used by HistogramSnapshotManager, which |
19 // handles the logistics of gathering up available histograms for recording. | 19 // handles the logistics of gathering up available histograms for recording. |
20 // The implementors handle the exact lower level recording mechanism, or | 20 // The implementors handle the exact lower level recording mechanism, or |
21 // error report mechanism. | 21 // error report mechanism. |
22 class BASE_EXPORT HistogramFlattener { | 22 class BASE_EXPORT HistogramFlattener { |
23 public: | 23 public: |
24 virtual void RecordDelta(const HistogramBase& histogram, | 24 virtual void RecordDelta(const HistogramBase& histogram, |
25 const HistogramSamples& snapshot) = 0; | 25 const HistogramSamples& snapshot) = 0; |
26 | 26 |
27 // Will be called each time a type of Inconsistenies is seen on a histogram, | 27 // Will be called each time a type of Inconsistency is seen on a histogram, |
28 // during inspections done internally in HistogramSnapshotManager class. | 28 // during inspections done internally in HistogramSnapshotManager class. |
29 virtual void InconsistencyDetected(Histogram::Inconsistencies problem) = 0; | 29 virtual void InconsistencyDetected(HistogramBase::Inconsistency problem) = 0; |
30 | 30 |
31 // Will be called when a type of Inconsistenies is seen for the first time | 31 // Will be called when a type of Inconsistency is seen for the first time on |
32 // on a histogram. | 32 // a histogram. |
33 virtual void UniqueInconsistencyDetected( | 33 virtual void UniqueInconsistencyDetected( |
34 Histogram::Inconsistencies problem) = 0; | 34 HistogramBase::Inconsistency problem) = 0; |
35 | 35 |
36 // Will be called when the total logged sample count of a histogram | 36 // Will be called when the total logged sample count of a histogram |
37 // differs from the sum of logged sample count in all the buckets. The | 37 // differs from the sum of logged sample count in all the buckets. The |
38 // argument |amount| is the non-zero discrepancy. | 38 // argument |amount| is the non-zero discrepancy. |
39 virtual void InconsistencyDetectedInLoggedCount(int amount) = 0; | 39 virtual void InconsistencyDetectedInLoggedCount(int amount) = 0; |
40 | 40 |
41 protected: | 41 protected: |
42 HistogramFlattener() {} | 42 HistogramFlattener() {} |
43 virtual ~HistogramFlattener() {} | 43 virtual ~HistogramFlattener() {} |
44 | 44 |
45 private: | 45 private: |
46 DISALLOW_COPY_AND_ASSIGN(HistogramFlattener); | 46 DISALLOW_COPY_AND_ASSIGN(HistogramFlattener); |
47 }; | 47 }; |
48 | 48 |
49 } // namespace base | 49 } // namespace base |
50 | 50 |
51 #endif // BASE_METRICS_HISTOGRAM_FLATTENER_H_ | 51 #endif // BASE_METRICS_HISTOGRAM_FLATTENER_H_ |
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