Re: Tasking question (not the same as ^^^)

[balmacara9@aol.com (Balmacara9)]

>Subject: Tasking question (not the same as ^^^)
>From: paulvg@eelab.su.oz.au (Paul Van Gorp)
>Date: Fri, Oct 10, 1997 02:42 EDT
>Message-id: <61kipb$p28$1@reader1.reader.news.ozemail.net>
>
>I am having this strange problem with tasking, here is the scenario...
>
>task DO_STUFF is
>	entry do_stuff1(...);
>	entry do_stuff2(...);
>end DO_STUFF;
>
>task user is	-- interacts with DO_STUFF
>	entry input_entered(c: Character);	-- the body for this interacts
 with
>DO_STUFF
>end user;
>
>-- and the mail program has this loop...
>
>begin 
>
>...
>	loop
>		ch := Getch;	-- doesn't have to be Getch, could just be a
 read
>		user.input_entered(ch);
>	end loop
>...
>end ...;
>
>Now, It may be a rotten way to do it, but it works fine when there is no
>facility for a simple keyboard interface, the tasks all seem to not operate
>when input is being awaited from the keyboard.
>
>It seems to work fine when I hardcode input ( user.input_entered(...) ) in
>the
>main part of the program.
>
>Wondering if anyone might have a clue as to what the program might be...
>
>Thanks in advance..
>
>Paul
>
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Your OS may be blocking your entire process when you call the Getch function or
 the Read function. I have dealt with serveral Unix compilers which did not use
 Posix/Native threads to implement tasking. Look in the appendix F of your
 compiler manual.