15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef BASE_METRICS_HISTOGRAM_FLATTENER_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define BASE_METRICS_HISTOGRAM_FLATTENER_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <map> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/metrics/histogram.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class HistogramSamples; 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// HistogramFlattener is an interface used by HistogramSnapshotManager, which 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// handles the logistics of gathering up available histograms for recording. 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The implementors handle the exact lower level recording mechanism, or 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// error report mechanism. 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BASE_EXPORT HistogramFlattener { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual void RecordDelta(const HistogramBase& histogram, 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const HistogramSamples& snapshot) = 0; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Will be called each time a type of Inconsistency is seen on a histogram, 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // during inspections done internally in HistogramSnapshotManager class. 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual void InconsistencyDetected(HistogramBase::Inconsistency problem) = 0; 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Will be called when a type of Inconsistency is seen for the first time on 322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // a histogram. 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void UniqueInconsistencyDetected( 342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) HistogramBase::Inconsistency problem) = 0; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Will be called when the total logged sample count of a histogram 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // differs from the sum of logged sample count in all the buckets. The 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // argument |amount| is the non-zero discrepancy. 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void InconsistencyDetectedInLoggedCount(int amount) = 0; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) protected: 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HistogramFlattener() {} 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~HistogramFlattener() {} 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(HistogramFlattener); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // BASE_METRICS_HISTOGRAM_FLATTENER_H_ 52