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