Author: Uri Blass
Date: 16:18:33 08/30/04
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On August 30, 2004 at 18:39:58, Dieter Buerssner wrote: >On August 30, 2004 at 15:39:45, Robert Hyatt wrote: > >>On August 30, 2004 at 14:40:25, Uri Blass wrote: >> >>>/* When using Standard C input functions, also check if there >>>is anything in the buffer. After a call to such functions, >>>the input waiting in the pipe will be copied to the buffer, >>>and the call to PeekNamedPipe can indicate no input available. >>>Setting stdin to unbuffered was not enough, IIRC */ >>>//input_init(); >>> if (stdin->_cnt > 0) >>> return 1; >>That will not work reliably. If you run with winboard/xboard long enough it is >>guaranteed to hang for the reason I gave. PeekNamedPipe will not see input that >>has already been read by the C library and tucked away in a library buffer. > >It seems to work very reliably for me. See the above comment in the code (I >actually wrote that comment ...). > >Under Unix, setting stdin to non-buffered by the Standard C function setvbuf >and using select seems to work reliably, too. I read all the input with the >Standard C FILE * interface. > >Regards, >Dieter Yes I copied this from you when I asked how to read winboard commands during pondering in the winboard forum. It may be better to add the author of the comments when I add comments by other people in the future. Practically big part of the time that I use for movei is thinking or writing code for technical tasks and I wish to finish with these problems so I can release a new version of movei because I do not want to release another buggy version. I have a question for you about checking input during pondering. Today I check every 8192 nodes and movei is a slow searcher so even on fast hardware it is doing it less than 100 times in a second. I do not like to spend time during pondering because of not getting the time command fast enough but if I look very often for winboard commands movei is slowed by a significant factor under winboard. How do you deal with that problem(I want movei to be able to play with ponder on even at 5 seconds per game without losing on time at least if I disable animation under winboard). I guess that a possible way is simply to agree to be slowed down by a significant factor during pondering when you are in time trouble and accept losing nearly 0.01 seconds when you are not in time trouble. Is there a better way? Uri
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