| // 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_FLATTENER_H_ |
| #define BASE_METRICS_HISTOGRAM_FLATTENER_H_ |
| |
| #include <map> |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/metrics/histogram.h" |
| |
| namespace base { |
| |
| // HistogramFlattener is an interface for the logistics of gathering up |
| // available histograms for recording. The implementors handle the exact lower |
| // level recording mechanism, or error report mechanism. |
| class BASE_EXPORT HistogramFlattener { |
| public: |
| virtual void RecordDelta(const base::Histogram& histogram, |
| const base::Histogram::SampleSet& snapshot) = 0; |
| |
| // Record various errors found during attempts to record histograms. |
| virtual void InconsistencyDetected(int problem) = 0; |
| virtual void UniqueInconsistencyDetected(int problem) = 0; |
| virtual void SnapshotProblemResolved(int amount) = 0; |
| |
| protected: |
| HistogramFlattener() {} |
| virtual ~HistogramFlattener() {} |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(HistogramFlattener); |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_METRICS_HISTOGRAM_FLATTENER_H_ |