Repo created

TMessagesProj/jni/voip/webrtc/base/metrics/sample_map.h

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+// 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 <stdint.h>
+
+#include <map>
+#include <memory>
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/metrics/histogram_base.h"
+#include "base/metrics/histogram_samples.h"
+
+namespace base {
+
+// The logic here is similar to that of PersistentSampleMap but with different
+// data structures. Changes here likely need to be duplicated there.
+class BASE_EXPORT SampleMap : public HistogramSamples {
+ public:
+  SampleMap();
+  explicit SampleMap(uint64_t id);
+  ~SampleMap() override;
+
+  // HistogramSamples:
+  void Accumulate(HistogramBase::Sample value,
+                  HistogramBase::Count count) override;
+  HistogramBase::Count GetCount(HistogramBase::Sample value) const override;
+  HistogramBase::Count TotalCount() const override;
+  std::unique_ptr<SampleCountIterator> Iterator() const override;
+
+ protected:
+  // Performs arithemetic. |op| is ADD or SUBTRACT.
+  bool AddSubtractImpl(SampleCountIterator* iter, Operator op) override;
+
+ private:
+  std::map<HistogramBase::Sample, HistogramBase::Count> sample_counts_;
+
+  DISALLOW_COPY_AND_ASSIGN(SampleMap);
+};
+
+}  // namespace base
+
+#endif  // BASE_METRICS_SAMPLE_MAP_H_