From: nobu.nokada@...
Date: 2003-09-25T08:53:28+09:00
Subject: Re: When threads block

Hi,

At Wed, 24 Sep 2003 22:38:58 +0900,
Hans Fugal wrote:
> Ok, I jumped the gun just a little. On linux /most/ things don't block.
> But /some/ things do. e.g.
> 
> thread = Thread.new do
>     fifo = File.open("fifo","r")
>     l = fifo.readline
>     puts "#{Time.new} #{l}"
> end
> 
> puts "#{Time.new} bar"
> thread.join

You can use IO::NONBLOCK with IO::RDONLY instead of "r".

> Is there a list of these sorts of things? I need to know what to expect if
> I'm going to be able to use ruby for this (soft) real-time application.

File#flock, and some Socket methods do.  Use resolv-replace.rb
for the latter.

-- 
Nobu Nakada