Date: Tue, 17 Oct 95 09:34 PDT From: jdp@polstra.com (John Polstra) To: freebsd-hackers@polstra.com Subject: Re: getdtablesize() broken? Message-ID: <m0t5EyY-000077C@seattle.polstra.com>
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In <199510170210.TAA26181@phaeton.artisoft.com>, Terry Lambert <terry@lambert.org> wrote: > > >Poll, anyone? > > > > >Poll is inferior to select, > > > > Debatable. > > Not. 8-). > > > >both because of the 10ms limit on timeout > > >resoloution > > > > Man pages only say that if the host does not support millisecond > > accuracy then the value is rounded up to the nearest legal value > > available. > > 10ms is the argument resoloution. On Solaris, it's 10ms, while select() > is till 4uS. select() wins. 8-). Why do you say "10ms is the argument resoloution"? The man pages explicitly say that the timeout is specified in milliseconds. Simple tests indicate that the man pages are accurate. What is the basis for your claim? > > [Responding to a claim by Terry that poll doesn't support simple timed > > waits not involving file descriptors] > > > > That hasn't been my experience. poll(0, NULL, 10000); waits 10 seconds > > on SunOS, all SVR4-en I have here, HPUX, and AIX; however Digital Unix's > > poll looses. In fact in SVR4 select(3) is implemented using poll(2). > > That's a bug in SVR4. SVR4 is broken and bogus in many, many ways. You're confusing me. First you say that poll is no good because it doesn't support simple timed waits. Then somebody points out that you were wrong, and poll does in fact support that. So then you say that polls which work that way are broken. Poll is broken, because it fails to exhibit the broken behavior which you originally claimed it had? Have I got this right? > SVR4 is broken and bogus in many, many ways. Of course SVR4 is broken. FreeBSD is broken. Linux is broken. VMS is broken. They're all broken, in one way or another. That doesn't automatically mean that their every feature is broken. I've used both select and poll in many, many applications. They both got the job done for me. John Polstra jdp@polstra.com Polstra & Co., Inc. Seattle, Washington USA "Self-knowledge is always bad news." -- John Barth
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