Externals blocking calls.

[Dar Scott]

On Jun 2, 2005, at 7:06 AM, N wrote:

> Is the a construct simular to wait with messages for calling 
> externals? Meaning when I call a external function of functions and it 
> is a "blocking call" is there any way the RR message pump can continue 
> processing.

I've never done it, but you might be able to use one of the callbacks 
to essentially wait for messages.  I don't know if that would do what 
you want.

Or you can break up your problem into smaller pieces and make several 
calls.

If the external is making a system blocking call that is waiting for 
I/O then those two might not work.  There you need to do one of two 
things.  You can find a nonblocking way to do what you want.  This is 
usually doable in Windows.  Or you can create a thread to execute the 
blocking call.  I sometimes do the latter, but I'm hesitant to 
encourage others to do so, since it might require a learning curve and 
there are subtle ways to go wrong.

Or you can put the blocking call in a command-line utility or find a 
command-line utility that does what you want.  Then all you have to do 
is figure out how to run that.

Dar
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