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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_UI_WEBUI_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_UI_CONSTANTS_H_
      6 #define CHROME_BROWSER_UI_WEBUI_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_UI_CONSTANTS_H_
      7 
      8 #include "base/basictypes.h"
      9 
     10 namespace performance_monitor {
     11 
     12 enum EventCategory {
     13   EVENT_CATEGORY_EXTENSIONS,
     14   EVENT_CATEGORY_CHROME,
     15   EVENT_CATEGORY_EXCEPTIONS,
     16   EVENT_CATEGORY_NUMBER_OF_CATEGORIES
     17 };
     18 
     19 enum MetricCategory {
     20   METRIC_CATEGORY_CPU,
     21   METRIC_CATEGORY_MEMORY,
     22   METRIC_CATEGORY_TIMING,
     23   METRIC_CATEGORY_NETWORK,
     24   METRIC_CATEGORY_NUMBER_OF_CATEGORIES
     25 };
     26 
     27 enum Unit {
     28   UNIT_BYTES,
     29   UNIT_KILOBYTES,
     30   UNIT_MEGABYTES,
     31   UNIT_GIGABYTES,
     32   UNIT_TERABYTES,
     33   UNIT_MICROSECONDS,
     34   UNIT_MILLISECONDS,
     35   UNIT_SECONDS,
     36   UNIT_MINUTES,
     37   UNIT_HOURS,
     38   UNIT_DAYS,
     39   UNIT_WEEKS,
     40   UNIT_MONTHS,
     41   UNIT_YEARS,
     42   UNIT_PERCENT,
     43   UNIT_UNDEFINED
     44 };
     45 
     46 // The different options for aggregation when we pass data to the UI side.
     47 enum AggregationMethod {
     48   // IMPORTANT! These values are hard-coded in
     49   // chrome/browser/resources/performance_monitor.js. Please do not change them.
     50   AGGREGATION_METHOD_NONE,
     51   AGGREGATION_METHOD_MEDIAN,
     52   AGGREGATION_METHOD_MEAN,
     53   AGGREGATION_METHOD_NUMBER_OF_METHODS
     54 };
     55 
     56 
     57 // A MeasurementType represents the "type" of data which we are measuring, e.g.
     58 // whether we are measuring distance, memory amounts, time, etc. Two units can
     59 // be converted if and only if they are in the same type. We can convert
     60 // two units of distance (meters to centimeters), but cannot convert a unit of
     61 // time to a unit of memory (seconds to megabytes).
     62 enum MeasurementType {
     63   MEASUREMENT_TYPE_MEMORY,
     64   MEASUREMENT_TYPE_PERCENT,
     65   MEASUREMENT_TYPE_TIME,
     66   MEASUREMENT_TYPE_UNDEFINED
     67 };
     68 
     69 // A struct which holds the conversion information for each unit. The
     70 // |amount_in_base_units| corresponds to the value of 1 |unit| in the specified
     71 // base for the measurement type (for instance, since the base unit for memory
     72 // is bytes, a kilobyte would have |amount_in_base_units| of 1 << 10.
     73 struct UnitDetails {
     74   const Unit unit;
     75   const MeasurementType measurement_type;
     76   const int64 amount_in_base_units;
     77 };
     78 
     79 // Returns the corresponding UnitDetails for the given unit, or NULL if invalid.
     80 const UnitDetails* GetUnitDetails(Unit unit);
     81 
     82 }  // namespace performance_monitor
     83 
     84 #endif  // CHROME_BROWSER_UI_WEBUI_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_UI_CONSTANTS_H_
     85