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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 // SampleVector implements HistogramSamples interface. It is used by all | 5 // SampleVector implements HistogramSamples interface. It is used by all |
6 // Histogram based classes to store samples. | 6 // Histogram based classes to store samples. |
7 | 7 |
8 #ifndef BASE_METRICS_SAMPLE_VECTOR_H_ | 8 #ifndef BASE_METRICS_SAMPLE_VECTOR_H_ |
9 #define BASE_METRICS_SAMPLE_VECTOR_H_ | 9 #define BASE_METRICS_SAMPLE_VECTOR_H_ |
10 | 10 |
11 #include <vector> | 11 #include <vector> |
12 | 12 |
13 #include "base/compiler_specific.h" | 13 #include "base/compiler_specific.h" |
14 #include "base/gtest_prod_util.h" | 14 #include "base/gtest_prod_util.h" |
15 #include "base/memory/scoped_ptr.h" | 15 #include "base/memory/scoped_ptr.h" |
16 #include "base/metrics/histogram_base.h" | 16 #include "base/metrics/histogram_base.h" |
17 #include "base/metrics/histogram_samples.h" | 17 #include "base/metrics/histogram_samples.h" |
18 | 18 |
19 namespace base { | 19 namespace base { |
20 | 20 |
21 class BucketRanges; | 21 class BucketRanges; |
22 | 22 |
23 class BASE_EXPORT_PRIVATE SampleVector : public HistogramSamples { | 23 class BASE_EXPORT SampleVector : public HistogramSamples { |
24 public: | 24 public: |
25 explicit SampleVector(const BucketRanges* bucket_ranges); | 25 explicit SampleVector(const BucketRanges* bucket_ranges); |
26 ~SampleVector() override; | 26 ~SampleVector() override; |
27 | 27 |
28 // HistogramSamples implementation: | 28 // HistogramSamples implementation: |
29 void Accumulate(HistogramBase::Sample value, | 29 void Accumulate(HistogramBase::Sample value, |
30 HistogramBase::Count count) override; | 30 HistogramBase::Count count) override; |
31 HistogramBase::Count GetCount(HistogramBase::Sample value) const override; | 31 HistogramBase::Count GetCount(HistogramBase::Sample value) const override; |
32 HistogramBase::Count TotalCount() const override; | 32 HistogramBase::Count TotalCount() const override; |
33 scoped_ptr<SampleCountIterator> Iterator() const override; | 33 scoped_ptr<SampleCountIterator> Iterator() const override; |
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46 FRIEND_TEST_ALL_PREFIXES(HistogramTest, CorruptSampleCounts); | 46 FRIEND_TEST_ALL_PREFIXES(HistogramTest, CorruptSampleCounts); |
47 | 47 |
48 std::vector<HistogramBase::AtomicCount> counts_; | 48 std::vector<HistogramBase::AtomicCount> counts_; |
49 | 49 |
50 // Shares the same BucketRanges with Histogram object. | 50 // Shares the same BucketRanges with Histogram object. |
51 const BucketRanges* const bucket_ranges_; | 51 const BucketRanges* const bucket_ranges_; |
52 | 52 |
53 DISALLOW_COPY_AND_ASSIGN(SampleVector); | 53 DISALLOW_COPY_AND_ASSIGN(SampleVector); |
54 }; | 54 }; |
55 | 55 |
56 class BASE_EXPORT_PRIVATE SampleVectorIterator : public SampleCountIterator { | 56 class BASE_EXPORT SampleVectorIterator : public SampleCountIterator { |
57 public: | 57 public: |
58 SampleVectorIterator(const std::vector<HistogramBase::AtomicCount>* counts, | 58 SampleVectorIterator(const std::vector<HistogramBase::AtomicCount>* counts, |
59 const BucketRanges* bucket_ranges); | 59 const BucketRanges* bucket_ranges); |
60 ~SampleVectorIterator() override; | 60 ~SampleVectorIterator() override; |
61 | 61 |
62 // SampleCountIterator implementation: | 62 // SampleCountIterator implementation: |
63 bool Done() const override; | 63 bool Done() const override; |
64 void Next() override; | 64 void Next() override; |
65 void Get(HistogramBase::Sample* min, | 65 void Get(HistogramBase::Sample* min, |
66 HistogramBase::Sample* max, | 66 HistogramBase::Sample* max, |
67 HistogramBase::Count* count) const override; | 67 HistogramBase::Count* count) const override; |
68 | 68 |
69 // SampleVector uses predefined buckets, so iterator can return bucket index. | 69 // SampleVector uses predefined buckets, so iterator can return bucket index. |
70 bool GetBucketIndex(size_t* index) const override; | 70 bool GetBucketIndex(size_t* index) const override; |
71 | 71 |
72 private: | 72 private: |
73 void SkipEmptyBuckets(); | 73 void SkipEmptyBuckets(); |
74 | 74 |
75 const std::vector<HistogramBase::AtomicCount>* counts_; | 75 const std::vector<HistogramBase::AtomicCount>* counts_; |
76 const BucketRanges* bucket_ranges_; | 76 const BucketRanges* bucket_ranges_; |
77 | 77 |
78 size_t index_; | 78 size_t index_; |
79 }; | 79 }; |
80 | 80 |
81 } // namespace base | 81 } // namespace base |
82 | 82 |
83 #endif // BASE_METRICS_SAMPLE_VECTOR_H_ | 83 #endif // BASE_METRICS_SAMPLE_VECTOR_H_ |
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