Author: Alessandro Damiani
Date: 05:48:33 06/10/98
Go up one level in this thread
On June 10, 1998 at 06:41:15, Inmann Werner wrote:
>On June 10, 1998 at 03:23:05, Alessandro Damiani wrote:
>
>>Hi all!
>>
>>Currently I am converting my program Fortress from Oberon2 to C (not
>>because I prefer C).
>>
>>On my old Amiga I used an interrupt (frequency: 50Hz) to determine if
>>the search time is over:
>>
>> VAR
>> TimerOn * : BOOLEAN;
>> ticks * : INTEGER;
>> Timer * : LONGINT;
>> TimeUsed * : LONGINT;
>>
>> PROCEDURE TimerInt;
>> (* $SaveRegs+ *)
>> BEGIN
>> IF TimerOn THEN
>> IF ticks>0 THEN
>> DEC(ticks)
>> ELSE
>> ticks:= 50;
>> IF Timer>0 THEN DEC(Timer) END;
>> IF TimeUsed<MAX(LONGINT) THEN
>> INC(TimeUsed)
>> END
>> END
>> END
>> END TimerInt;
>>
>>Before the search is started the variable Timer is set to the time limit
>>and TimeUsed to 0. To determine if the time is over, one has only to
>>test if Timer is equal to 0. This is done in every node of the 'tree'.
>>
>>I don`t like to read the clock after some nodes. So I want to use such a
>>timer in C. How can it be done on a SUN and on a PC?
>>
>>thanks
>>
>>Alessandro
>
>Hello Alessandro
>
>My program also is in c.
>
>In most C Compilers, there is a function called ftime
>
>You have to include some file like "time.h" (see compiler)
>
>program
>
>#include <stdio.h>
>#include <time.h>
>#include <timeb.h>
>
>main()
>{
>struct timeb tt;
>long mytime;
>
>ftime(&tt);
>mytime=tt.time*1000+tt.millitm;
>
>
>if you do this, you have the time in millisec in mytime as a start time
>
>youse the same routinme sometimes else with another long variable and
>the
>difference is the ellapsed time.
>
>I don´t know, if it helps you!
>
>Best wishes
>
>Werner
this means reading the clock every n nodes in the search, which I wanted
to avoid (the test if (Timer==0) 'abort search'; in every node is
faster).
In Crafty Bob reads the clock, too. Is my implementation too hardware
specific?
Alessandro
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