[plt-scheme] scheme equivelent(?) to select(2)?

Since mzscheme appears to support threads for every platform it runs on, 
I tend to write network code that makes a thread for every port.  Then 
I  use  read in each thread and let the calls block.   I'm not sure of 
the best way to do it in one thread.

Mike wrote:

>I'm working on the tcp portion of my server monitor.  I C at
>this point I would use select(2) to detect if any connections to
>servers had messages to read. In the manual under the TCP section
>I do see ways to 'peek' for bytes, but nothing that seems to be a
>select() call. I have my connections stored in a hash and am using
>(hash-table-for-each) to loop through the current connections. I
>guess what I really want is more of something like (read? p) that
>returns #t if there are bytes available for reading.
>
>Mike
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