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Side by Side Diff: base/metrics/histogram.h

Issue 6081007: Start sorting methods in class declarations. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: nits Created 9 years, 11 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // Histogram is an object that aggregates statistics, and can summarize them in 5 // Histogram is an object that aggregates statistics, and can summarize them in
6 // various forms, including ASCII graphical, HTML, and numerically (as a 6 // various forms, including ASCII graphical, HTML, and numerically (as a
7 // vector of numbers corresponding to each of the aggregating buckets). 7 // vector of numbers corresponding to each of the aggregating buckets).
8 8
9 // It supports calls to accumulate either time intervals (which are processed 9 // It supports calls to accumulate either time intervals (which are processed
10 // as integral number of milliseconds), or arbitrary integral units. 10 // as integral number of milliseconds), or arbitrary integral units.
11 11
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535 535
536 DISALLOW_COPY_AND_ASSIGN(Histogram); 536 DISALLOW_COPY_AND_ASSIGN(Histogram);
537 }; 537 };
538 538
539 //------------------------------------------------------------------------------ 539 //------------------------------------------------------------------------------
540 540
541 // LinearHistogram is a more traditional histogram, with evenly spaced 541 // LinearHistogram is a more traditional histogram, with evenly spaced
542 // buckets. 542 // buckets.
543 class LinearHistogram : public Histogram { 543 class LinearHistogram : public Histogram {
544 public: 544 public:
545 virtual ClassType histogram_type() const; 545 virtual ~LinearHistogram();
546
547 // Store a list of number/text values for use in rendering the histogram.
548 // The last element in the array has a null in its "description" slot.
549 virtual void SetRangeDescriptions(const DescriptionPair descriptions[]);
550 546
551 /* minimum should start from 1. 0 is as minimum is invalid. 0 is an implicit 547 /* minimum should start from 1. 0 is as minimum is invalid. 0 is an implicit
552 default underflow bucket. */ 548 default underflow bucket. */
553 static scoped_refptr<Histogram> FactoryGet(const std::string& name, 549 static scoped_refptr<Histogram> FactoryGet(const std::string& name,
554 Sample minimum, Sample maximum, size_t bucket_count, Flags flags); 550 Sample minimum, Sample maximum, size_t bucket_count, Flags flags);
555 static scoped_refptr<Histogram> FactoryTimeGet(const std::string& name, 551 static scoped_refptr<Histogram> FactoryTimeGet(const std::string& name,
556 TimeDelta minimum, TimeDelta maximum, size_t bucket_count, 552 TimeDelta minimum, TimeDelta maximum, size_t bucket_count,
557 Flags flags); 553 Flags flags);
558 554
559 virtual ~LinearHistogram(); 555 // Overridden from Histogram:
556 virtual ClassType histogram_type() const;
557
558 // Store a list of number/text values for use in rendering the histogram.
559 // The last element in the array has a null in its "description" slot.
560 virtual void SetRangeDescriptions(const DescriptionPair descriptions[]);
560 561
561 protected: 562 protected:
562 LinearHistogram(const std::string& name, Sample minimum, 563 LinearHistogram(const std::string& name, Sample minimum,
563 Sample maximum, size_t bucket_count); 564 Sample maximum, size_t bucket_count);
564 565
565 LinearHistogram(const std::string& name, TimeDelta minimum, 566 LinearHistogram(const std::string& name, TimeDelta minimum,
566 TimeDelta maximum, size_t bucket_count); 567 TimeDelta maximum, size_t bucket_count);
567 568
568 // Initialize ranges_ mapping. 569 // Initialize ranges_ mapping.
569 virtual void InitializeBucketRange(); 570 virtual void InitializeBucketRange();
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603 explicit BooleanHistogram(const std::string& name); 604 explicit BooleanHistogram(const std::string& name);
604 605
605 DISALLOW_COPY_AND_ASSIGN(BooleanHistogram); 606 DISALLOW_COPY_AND_ASSIGN(BooleanHistogram);
606 }; 607 };
607 608
608 //------------------------------------------------------------------------------ 609 //------------------------------------------------------------------------------
609 610
610 // CustomHistogram is a histogram for a set of custom integers. 611 // CustomHistogram is a histogram for a set of custom integers.
611 class CustomHistogram : public Histogram { 612 class CustomHistogram : public Histogram {
612 public: 613 public:
613 virtual ClassType histogram_type() const;
614 614
615 static scoped_refptr<Histogram> FactoryGet(const std::string& name, 615 static scoped_refptr<Histogram> FactoryGet(const std::string& name,
616 const std::vector<Sample>& custom_ranges, Flags flags); 616 const std::vector<Sample>& custom_ranges, Flags flags);
617 617
618 // Overridden from Histogram:
619 virtual ClassType histogram_type() const;
620
618 protected: 621 protected:
619 CustomHistogram(const std::string& name, 622 CustomHistogram(const std::string& name,
620 const std::vector<Sample>& custom_ranges); 623 const std::vector<Sample>& custom_ranges);
621 624
622 // Initialize ranges_ mapping. 625 // Initialize ranges_ mapping.
623 virtual void InitializeBucketRange(); 626 virtual void InitializeBucketRange();
624 virtual double GetBucketSize(Count current, size_t i) const; 627 virtual double GetBucketSize(Count current, size_t i) const;
625 628
626 private: 629 private:
627 // Temporary pointer used during construction/initialization, and then NULLed. 630 // Temporary pointer used during construction/initialization, and then NULLed.
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686 689
687 // Dump all known histograms to log. 690 // Dump all known histograms to log.
688 static bool dump_on_exit_; 691 static bool dump_on_exit_;
689 692
690 DISALLOW_COPY_AND_ASSIGN(StatisticsRecorder); 693 DISALLOW_COPY_AND_ASSIGN(StatisticsRecorder);
691 }; 694 };
692 695
693 } // namespace base 696 } // namespace base
694 697
695 #endif // BASE_METRICS_HISTOGRAM_H_ 698 #endif // BASE_METRICS_HISTOGRAM_H_
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