37 lines
949 B
C
37 lines
949 B
C
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// 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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#ifndef BASE_METRICS_HISTOGRAM_FLATTENER_H_
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#define BASE_METRICS_HISTOGRAM_FLATTENER_H_
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#include <map>
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#include <string>
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#include "base/macros.h"
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#include "base/metrics/histogram.h"
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namespace base {
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class HistogramSamples;
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// HistogramFlattener is an interface used by HistogramSnapshotManager, which
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// handles the logistics of gathering up available histograms for recording.
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class BASE_EXPORT HistogramFlattener {
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public:
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virtual ~HistogramFlattener() = default;
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virtual void RecordDelta(const HistogramBase& histogram,
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const HistogramSamples& snapshot) = 0;
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protected:
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HistogramFlattener() = default;
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private:
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DISALLOW_COPY_AND_ASSIGN(HistogramFlattener);
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};
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} // namespace base
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#endif // BASE_METRICS_HISTOGRAM_FLATTENER_H_
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