Re: Making Event work for Win32

Graham Barr <[email protected]> writes:
>On Tue, Mar 21, 2000 at 04:10:45PM +0000, Nick Ing-Simmons wrote:
>> But when Event says "handle is readable" how is perl code going to 
>> do its IO to read it?  - right now <$fh> or even sysread($fh,...)
>> call MS stdio to do that - which will fail if Handles are in async mode.

Just for the record the "async" mode I am talking about here is the 
callback style. When you do the read() equivalent you pass it a buffer
and a subroutine to call. It returns immediately with a "status" which 
say "operation initiated" or some such. Later when kernel has filled 
the buffer according to parameters you passed it calls the subroutine
passing the buffer and a context argument. This is elegant and efficient
and fits well with GUI style callback code but is very alien to UNIX 
read() semantics - so not surprisingly MS's C runtime does not work
if HANDLE is open in that mode.

-- 
Nick Ing-Simmons <[email protected]>
Via, but not speaking for: Texas Instruments Ltd.