Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!kithrup!sef
From: sef@kithrup.COM (Sean Eric Fagan)
Newsgroups: comp.unix.questions
Subject: Re: talk session
Message-ID: <1991May10.203625.23219@kithrup.COM>
Date: 10 May 91 20:36:25 GMT
References: <1991May7.102219.25557@ssd.kodak.com> <1991May08.175740.12233@kithrup.COM> <7739@auspex.auspex.com>
Organization: Kithrup Enterprises, Ltd.
Lines: 32

In article <7739@auspex.auspex.com> guy@auspex.auspex.com (Guy Harris) writes:
>>SunOS:  usleep()
>Welcome to the club - the club, that is, of folks who think "usleep()"
>is a SunOS-ism.  Dunno how people get into that club; perhaps the first
>UNIX system on which they see "usleep()" is a SunOS system.
>"usleep()" first appeared in 4.3BSD; SunOS picked it up from there.

Ok.  I never got to play with a 4.3BSD system until a couple of years ago,
and, even then, there were quite a few modifications made locally.

>>SysVr3.[01]:  use poll(); this might not be present in your version of
>>	SysVr3.[01]
>What versions of S5R3.[01] deleted "poll()"?

The version of SysVr3.0 for teh 3B15 that CSU Northridge got when I was
there did not have STREAMS, and, therefore, didn't have poll().  (And, yeah,
I checked:  it didn't have poll().)

I don't know if that was a weird release, or if it was standard.  I am
fairly certain that STREAMS were standard for 3.1 and later.

>>4.[23]BSD:  use select() (similar to poll() above, but more portable)
>4.3BSD-and-later: use "usleep()".

Ok.  It is better than select(), or at least more intuitive and obvious what
you have to do 8-).

-- 
Sean Eric Fagan  | "I made the universe, but please don't blame me for it;
sef@kithrup.COM  |  I had a bellyache at the time."
-----------------+           -- The Turtle (Stephen King, _It_)
Any opinions expressed are my own, and generally unpopular with others.