| Re: IDL and external app in concurrent mode [message #22902] |
Tue, 12 December 2000 09:23  |
Craig Markwardt
Messages: 1869
Registered: November 1996
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Senior Member |
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barban74@my-deja.com writes:
> Hi everybody,
> my name is Andrea Barbaresi and I work in the research center
> of Telecom Italia Group, here in Italy.
>
> I read on "External Development Guide" that
> "IDL was not designed to be used in a threaded program" so
> I'd like to know if it's possible to accomplish, both in Windows
> and in Unix environment, a task like the one
> described below:
>
> Use a C++ program to activate a IDL widget-app
> in a non-blocking way (by means of "IDL_RunTimeExec()"
> statement?); after this call the program must be able to continue
> its execution and periodically give back the control to IDL to
> check if there are any messages from the GUI created by widget-app.
Hi Andrea--
I think your best bet is to use two separate programs with a means of
communication between them. Under Unix this is best accomplished with
a pipe. While it would be useful to use SPAWN, I'm not sure IDL is up
to the task since you probably want two-way communication. Also, you
probably want non-blocking I/O. Under Windows I'm sure there is some
similar IPC mechanism, but it's been a while. It used to be DDE but
that's been superseded I think.
Good luck,
Craig
--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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