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Unified Diff: base/metrics/histogram_samples.h

Issue 1647803004: Move base to DEPS (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: base/metrics/histogram_samples.h
diff --git a/base/metrics/histogram_samples.h b/base/metrics/histogram_samples.h
deleted file mode 100644
index 54185cf383ba02d25e5e586b2d69a9f822275db2..0000000000000000000000000000000000000000
--- a/base/metrics/histogram_samples.h
+++ /dev/null
@@ -1,88 +0,0 @@
-// 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.
-
-#ifndef BASE_METRICS_HISTOGRAM_SAMPLES_H_
-#define BASE_METRICS_HISTOGRAM_SAMPLES_H_
-
-#include "base/basictypes.h"
-#include "base/metrics/histogram_base.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace base {
-
-class Pickle;
-class PickleIterator;
-class SampleCountIterator;
-
-// HistogramSamples is a container storing all samples of a histogram.
-class BASE_EXPORT HistogramSamples {
- public:
- HistogramSamples();
- virtual ~HistogramSamples();
-
- virtual void Accumulate(HistogramBase::Sample value,
- HistogramBase::Count count) = 0;
- virtual HistogramBase::Count GetCount(HistogramBase::Sample value) const = 0;
- virtual HistogramBase::Count TotalCount() const = 0;
-
- virtual void Add(const HistogramSamples& other);
-
- // Add from serialized samples.
- virtual bool AddFromPickle(PickleIterator* iter);
-
- virtual void Subtract(const HistogramSamples& other);
-
- virtual scoped_ptr<SampleCountIterator> Iterator() const = 0;
- virtual bool Serialize(Pickle* pickle) const;
-
- // Accessor fuctions.
- int64 sum() const { return sum_; }
- HistogramBase::Count redundant_count() const {
- return subtle::NoBarrier_Load(&redundant_count_);
- }
-
- protected:
- // Based on |op| type, add or subtract sample counts data from the iterator.
- enum Operator { ADD, SUBTRACT };
- virtual bool AddSubtractImpl(SampleCountIterator* iter, Operator op) = 0;
-
- void IncreaseSum(int64 diff);
- void IncreaseRedundantCount(HistogramBase::Count diff);
-
- private:
- int64 sum_;
-
- // |redundant_count_| helps identify memory corruption. It redundantly stores
- // the total number of samples accumulated in the histogram. We can compare
- // this count to the sum of the counts (TotalCount() function), and detect
- // problems. Note, depending on the implementation of different histogram
- // types, there might be races during histogram accumulation and snapshotting
- // that we choose to accept. In this case, the tallies might mismatch even
- // when no memory corruption has happened.
- HistogramBase::AtomicCount redundant_count_;
-};
-
-class BASE_EXPORT SampleCountIterator {
- public:
- virtual ~SampleCountIterator();
-
- virtual bool Done() const = 0;
- virtual void Next() = 0;
-
- // Get the sample and count at current position.
- // |min| |max| and |count| can be NULL if the value is not of interest.
- // Requires: !Done();
- virtual void Get(HistogramBase::Sample* min,
- HistogramBase::Sample* max,
- HistogramBase::Count* count) const = 0;
-
- // Get the index of current histogram bucket.
- // For histograms that don't use predefined buckets, it returns false.
- // Requires: !Done();
- virtual bool GetBucketIndex(size_t* index) const;
-};
-
-} // namespace base
-
-#endif // BASE_METRICS_HISTOGRAM_SAMPLES_H_
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