From:	Endlisnis <s257m AT unb DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Can I send "IDLE" time messages to the OS?
Date:	Sat, 15 May 1999 22:25:26 -0400
Organization:	BrunNet
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Message-ID:	<373E2C96.22E9BD97@unb.ca>
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To:	djgpp AT delorie DOT com
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Grzegorz Adam Hankiewicz wrote:

> Hello.
>
> Now, with programs like Rhide running in W9x shows that even when you
> are doing nothing with them all the CPU is used. I would like to know
> if there's a special instruction or command to tell that even though
> the program is running, it doesn't catch CPU resources.

     #include <dpmi.h>
     void __dpmi_yield(void);

    This is Intel specific.  I don't know whether RHIDE uses it (or what
version of it use it), but I know that v1.6 uses 98% of the resources on my
333MHz machine when set in the background.  SetEdit (which Rhide is based off
of) only uses around 0.1% when in the background.  So it must use it.  Under
Linux, reading from stdin when there is nothing to read will switch you out.
There is also a way to use the "select" function to wait for incoming
information.  I suspect that your program will be activated if a key is
pressed even if it is not waiting for stdin.  Select seems fairly portable.

--
     (\/) Endlisnis (\/)
          s257m AT unb DOT ca
          Endlisnis AT HotMail DOT com
          ICQ: 32959047

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