From: Tanaka Akira <akr@...17n.org>
Date: 2005-12-17T12:24:18+09:00
Subject: Re: nonblocking TCPSocket in multithread software.

In article <8764poo4tq.fsf@dessyku.is-a-geek.org>,
  Yohanes Santoso <ysantoso-rubytalk@dessyku.is-a-geek.org> writes:

> I expect it to block. All IO's buffered I/O methods (puts, prints, read, write,
> etc.) are blocking operations.

Agreed.

> The utility of nonblock comes if you use unbuffered I/O methods:
> sysread, syswrite, recv, send, etc.

Unfortunately they blocks if there are multiple threads.

Apart from that syswrite (and other unbuffered writing
methods) blocks unless O_NONBLOCK.

Formar problem can be solved by IO.select.
Later problem can be solved by O_NONBLOCK.

I think it is useful that some utility nonblocking methods
to care above issues automatically.  However it is quite
difficult to propose method names which matz accept.
-- 
Tanaka Akira