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Re: Non-Blocking I/O [message #14287 is a reply to message #14286]

Mon, 15 February 1999 00:00

menakkis
Messages: 37
Registered: June 1998

Member

Ruediger Kupper <Ruediger.Kupper@Physik.Uni-Marburg.De> wrote:

<...>
> Okay, so there seems to be no way around using some intermediary C-Routines
> which handle reception.
> IDL just doesn't support Inter Process Communication...

Frankly I'm surprised that this interesting thread didn't tease out more
responses. I'm sure that there must be *dozens* of lurkers out there who
have been down this road.

Now I know next to zero about IPC and the like, but I was wondering if you
might have some luck with the /NOSTDIO switch to OPEN (on Unix platforms).
Reportedly, if you READU from a LUN opened like this, IDL will only read the
amount of data that is available. (Perhaps it will even read "zero bytes" if
nothing's available?) And you can reportedly use the TRANSFER_COUNT= switch
to READU to find out how many *elements* (not necc. bytes) were transferred.
Even if this works, I can imagine that reassembling data read in bits and
pieces on the IDL side might be a bit tricky, but it might still be worth a
try.

Peter Mason

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[Message index]

		Re: Non-Blocking I/O By: korpela on Tue, 16 February 1999 00:00
		Re: Non-Blocking I/O By: davidf on Mon, 15 February 1999 00:00
		Re: Non-Blocking I/O By: menakkis on Mon, 15 February 1999 00:00
		Re: Non-Blocking I/O By: ashmall on Sat, 13 February 1999 00:00
		Re: Non-Blocking I/O By: Ruediger Kupper on Fri, 12 February 1999 00:00
		Re: Non-Blocking I/O By: thompson on Thu, 11 February 1999 00:00
		Re: Non-Blocking I/O By: ashmall on Thu, 11 February 1999 00:00

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