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Comment:time_statistics: new parent package for time statistics gathering
Timelines: family | ancestors | descendants | both | trunk
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SHA1: 13debf8a9ef3b6ed6a40f65d1e7c0d64a65f9710
User & Date: nat on 2014-09-02 17:21:40
Other Links: manifest | tags
Context
2014-09-03
17:28
time_statistics-tests: new test packge for Time_Statistics hierarchy check-in: 55b72004aa user: nat tags: trunk
2014-09-02
17:21
time_statistics: new parent package for time statistics gathering check-in: 13debf8a9e user: nat tags: trunk
2014-09-01
18:29
s_expressions-atom_buffers: fix stream read check-in: 0e2f32ef01 user: nat tags: trunk
Changes
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Added src/natools-time_statistics.adb version [0f634c4fdb]. 































































































































































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------------------------------------------------------------------------------
-- Copyright (c) 2014, Natacha Porté                                        --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           --
------------------------------------------------------------------------------

package body Natools.Time_Statistics is

   ----------------------
   -- Public Interface --
   ----------------------

   overriding procedure Add (Self : in out Summary; Measure : in Duration) is
   begin
      Self.Data.Add (Measure);
   end Add;



   ------------------------------
   -- Summary Protected Object --
   ------------------------------

   protected body Summary_Data is

      procedure Add (Measure : in Duration) is
      begin
         if Measure > Max then
            Max := Measure;
         end if;

         if Measure < Min then
            Min := Measure;
         end if;

         Count := Count + 1;

         Current_Mean := Current_Mean
           + (Measure - Current_Mean) / Duration (Count);
      end Add;


      function Minimum return Duration is
      begin
         return Min;
      end Minimum;


      function Maximum return Duration is
      begin
         return Max;
      end Maximum;


      function Mean return Duration is
      begin
         return Current_Mean;
      end Mean;


      function Sample_Count return Natural is
      begin
         return Count;
      end Sample_Count;

   end Summary_Data;

end Natools.Time_Statistics;

Added src/natools-time_statistics.ads version [5f42e178c0]. 































































































































































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------------------------------------------------------------------------------
-- Copyright (c) 2014, Natacha Porté                                        --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           --
------------------------------------------------------------------------------

------------------------------------------------------------------------------
-- Natools.Time_Statistics is the root of various utilities to measure time --
-- and gather statistics.                                                   --
-- It also provides basic constant-space accumulator that keeps a summary   --
-- of seen values.                                                          --
------------------------------------------------------------------------------

package Natools.Time_Statistics is
   pragma Pure;

   type Accumulator is limited interface;

   procedure Add (Self : in out Accumulator; Measure : in Duration)
     is abstract;
      --  Add Measure to the accumulated statistics in Self



   type Summary is limited new Accumulator with private;
      --  Constant-space aggregator of duration values

   overriding procedure Add (Self : in out Summary; Measure : in Duration);
      --  Add Measure to the accumulated statistics

   not overriding function Minimum (Self : Summary) return Duration;
   not overriding function Maximum (Self : Summary) return Duration;
   not overriding function Mean (Self : Summary) return Duration;
   not overriding function Sample_Count (Self : Summary) return Natural;

private

   protected type Summary_Data is
      procedure Add (Measure : in Duration);
      function Minimum return Duration;
      function Maximum return Duration;
      function Mean return Duration;
      function Sample_Count return Natural;
   private
      Max : Duration := Duration'First;
      Min : Duration := Duration'Last;
      Current_Mean : Duration := 0.0;
      Count : Natural := 0;
   end Summary_Data;


   type Summary is limited new Accumulator with record
      Data : Summary_Data;
   end record;

   not overriding function Minimum (Self : Summary) return Duration
     is (Self.Data.Minimum);

   not overriding function Maximum (Self : Summary) return Duration
     is (Self.Data.Maximum);

   not overriding function Mean (Self : Summary) return Duration
     is (Self.Data.Mean);

   not overriding function Sample_Count (Self : Summary) return Natural
     is (Self.Data.Sample_Count);

end Natools.Time_Statistics;

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