| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // SampleMap implements HistogramSamples interface. It is used by the |
| // SparseHistogram class to store samples. |
| |
| #ifndef BASE_METRICS_SAMPLE_MAP_H_ |
| #define BASE_METRICS_SAMPLE_MAP_H_ |
| |
| #include <map> |
| |
| #include "base/compiler_specific.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/metrics/histogram_base.h" |
| #include "base/metrics/histogram_samples.h" |
| |
| namespace base { |
| |
| class BASE_EXPORT_PRIVATE SampleMap : public HistogramSamples { |
| public: |
| SampleMap(); |
| virtual ~SampleMap(); |
| |
| // HistogramSamples implementation: |
| virtual void Accumulate(HistogramBase::Sample value, |
| HistogramBase::Count count) override; |
| virtual HistogramBase::Count GetCount( |
| HistogramBase::Sample value) const override; |
| virtual HistogramBase::Count TotalCount() const override; |
| virtual scoped_ptr<SampleCountIterator> Iterator() const override; |
| |
| void ResetRedundantCount(HistogramBase::Count count); |
| |
| protected: |
| virtual bool AddSubtractImpl( |
| SampleCountIterator* iter, |
| HistogramSamples::Operator op) override; // |op| is ADD or SUBTRACT. |
| |
| private: |
| std::map<HistogramBase::Sample, HistogramBase::Count> sample_counts_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SampleMap); |
| }; |
| |
| class BASE_EXPORT_PRIVATE SampleMapIterator : public SampleCountIterator { |
| public: |
| typedef std::map<HistogramBase::Sample, HistogramBase::Count> |
| SampleToCountMap; |
| |
| SampleMapIterator(const SampleToCountMap& sample_counts); |
| virtual ~SampleMapIterator(); |
| |
| // SampleCountIterator implementation: |
| virtual bool Done() const override; |
| virtual void Next() override; |
| virtual void Get(HistogramBase::Sample* min, |
| HistogramBase::Sample* max, |
| HistogramBase::Count* count) const override; |
| private: |
| SampleToCountMap::const_iterator iter_; |
| const SampleToCountMap::const_iterator end_; |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_METRICS_SAMPLE_MAP_H_ |