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Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!tut.cis.ohio-state.edu!ukma!rutgers!att!homxb!homxc!dwc
From: dwc@homxc.ATT.COM (Malaclypse the Elder)
Newsgroups: comp.unix.microport,comp.unix.xenix,comp.unix.i386
Subject: Re: nap in Sys V (millisecond sleeps)
Keywords: XENIX SysV nap
Message-ID: <6235@homxc.ATT.COM>
Date: 7 Apr 89 00:47:14 GMT
References: <661@micropen> <743@omen.UUCP> <663@micropen> <716@pcrat.UUCP>
Organization: Legion of Dynamic Discord
Lines: 15


another way to do this is to write a pseudo-device driver
and use ioctl on that device to put an entry in the callout
table to wake itself up in N ticks.  then you can write a
user level nap() to hide all the ugliness.

or if you are uncomfortable with writing pseudo-device drivers,
then just reserve a tty line, open it, ioctl it into raw mode
and with a timeout value equivalent to the desired nap time and
do a read from that line.  again, once you know which tty line
is reserved for this, you can hide all the ugliness in a function
call.

danny chen
att!homxc!dwc