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Viewing changes to debian/modules/ngx_pagespeed/psol/include/third_party/chromium/src/base/metrics/histogram_delta_serialization.h

  • Committer: Frans Elliott
  • Date: 2015-06-12 21:15:13 UTC
  • Revision ID: mastergeek.elliott@gmail.com-20150612211513-un4vguj32deibvb0
Added the actual pagespeed library to the ngx_pagespeed module dir.

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debian/modules/ngx_pagespeed/psol/include/third_party/chromium/src/base/metrics/histogram_delta_serialization.h
 
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// Copyright 2013 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_DELTA_SERIALIZATION_H_
 
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#define BASE_METRICS_HISTOGRAM_DELTA_SERIALIZATION_H_
 
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#include <string>
 
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#include <vector>
 
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#include "base/base_export.h"
 
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#include "base/basictypes.h"
 
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#include "base/memory/scoped_ptr.h"
 
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#include "base/metrics/histogram_flattener.h"
 
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#include "base/metrics/histogram_snapshot_manager.h"
 
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namespace base {
 
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class HistogramBase;
 
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// Serializes and restores histograms deltas.
 
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class BASE_EXPORT HistogramDeltaSerialization : public HistogramFlattener {
 
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 public:
 
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  // |caller_name| is string used in histograms for counting inconsistencies.
 
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  explicit HistogramDeltaSerialization(const std::string& caller_name);
 
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  virtual ~HistogramDeltaSerialization();
 
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  // Computes deltas in histogram bucket counts relative to the previous call to
 
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  // this method. Stores the deltas in serialized form into |serialized_deltas|.
 
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  // If |serialized_deltas| is NULL, no data is serialized, though the next call
 
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  // will compute the deltas relative to this one.
 
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  void PrepareAndSerializeDeltas(std::vector<std::string>* serialized_deltas);
 
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  // Deserialize deltas and add samples to corresponding histograms, creating
 
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  // them if necessary. Silently ignores errors in |serialized_deltas|.
 
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  static void DeserializeAndAddSamples(
 
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      const std::vector<std::string>& serialized_deltas);
 
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 private:
 
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  // HistogramFlattener implementation.
 
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  virtual void RecordDelta(const HistogramBase& histogram,
 
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                           const HistogramSamples& snapshot) OVERRIDE;
 
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  virtual void InconsistencyDetected(
 
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      HistogramBase::Inconsistency problem) OVERRIDE;
 
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  virtual void UniqueInconsistencyDetected(
 
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      HistogramBase::Inconsistency problem) OVERRIDE;
 
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  virtual void InconsistencyDetectedInLoggedCount(int amount) OVERRIDE;
 
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  // Calculates deltas in histogram counters.
 
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  HistogramSnapshotManager histogram_snapshot_manager_;
 
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  // Output buffer for serialized deltas.
 
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  std::vector<std::string>* serialized_deltas_;
 
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  // Histograms to count inconsistencies in snapshots.
 
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  HistogramBase* inconsistencies_histogram_;
 
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  HistogramBase* inconsistencies_unique_histogram_;
 
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  HistogramBase* inconsistent_snapshot_histogram_;
 
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  DISALLOW_COPY_AND_ASSIGN(HistogramDeltaSerialization);
 
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};
 
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}  // namespace base
 
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#endif  // BASE_METRICS_HISTOGRAM_DELTA_SERIALIZATION_H_