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Re: 6.3 reactions? [message #48674 is a reply to message #48556]

Tue, 09 May 2006 10:30

codepod
Messages: 19
Registered: March 2006

Junior Member

The following code gives an idea of how this can work. Note: This isn't
exact, but should outline how the IDL-IDL bridge is used.

Preconditions:
Assume you have a variable MyData that you want to use as input to a
time consuming routine called MyRoutine. If you ran this in an IDL
application, the application would block until processing is done.
However with the bridge you can have it process in the background. The
general structure of the code is the following:

oBridge = obj_new("IDL_IDLBridge") ; creates the child process

;; Put the data in the child process session. This creates
;; a variable called Data in the child process and copies the
;; value of MyData into it. This exchange uses shared memory
;; to transfer values, but the actual data memory is not shared
;; between each process. (2 copies exist).
oBridge->SetVar, "Data", MyData

;; Lauch background processing
oBridge->Execute, "result = MyRoutine( Data )", /nowait

;; This call returns immediately

;; At this point this work will execute in the background
;; process. At a later time you can check and see if the
;; task is completed
iStatus = oBridge->Status()
if(iStatus eq 2)then begin ;; execution is completed
Result = oBridge->GetVar("Result") ;; get the result
endif

;; When you are completed with the process, just destroy the object
obj_destroy, oBridge

This simple example shows a "polling" method to check when the task is
completed. The object also has a callback methodology which operates
similar to an event callback. It will call a routine you specify when
an action happens (command done, error signaled).

Hopefully this helps.

-CP

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[Message index]

		6.3 reactions? By: Richard French on Mon, 01 May 2006 20:31
		Re: 6.3 reactions? By: codepod on Fri, 05 May 2006 07:25
		Re: 6.3 reactions? By: JD Smith on Fri, 05 May 2006 09:24
		Re: 6.3 reactions? By: Haje Korth on Thu, 04 May 2006 09:28
		Re: 6.3 reactions? By: R.Bauer on Thu, 04 May 2006 01:26
		Re: 6.3 reactions? By: codepod on Thu, 11 May 2006 13:15
		Re: 6.3 reactions? By: wem on Thu, 11 May 2006 10:26
		Re: 6.3 reactions? By: Haje Korth on Thu, 11 May 2006 10:06
		Re: 6.3 reactions? By: Foldy Lajos on Wed, 10 May 2006 10:24
		Re: 6.3 reactions? By: Haje Korth on Wed, 10 May 2006 09:33
		Re: 6.3 reactions? By: Craig Markwardt on Wed, 10 May 2006 08:23
		Re: 6.3 reactions? By: Mark Hadfield on Tue, 09 May 2006 16:21
		Re: 6.3 reactions? By: JD Smith on Tue, 09 May 2006 11:54
		Re: 6.3 reactions? By: JD Smith on Tue, 09 May 2006 11:59
		Re: 6.3 reactions? By: David Fanning on Tue, 09 May 2006 10:50
		Re: 6.3 reactions? By: codepod on Tue, 09 May 2006 10:30
		Re: 6.3 reactions? By: Richard French on Mon, 08 May 2006 21:23
		Re: 6.3 reactions? By: JD Smith on Mon, 08 May 2006 13:25
		Re: 6.3 reactions? By: codepod on Mon, 08 May 2006 07:29
		Re: 6.3 reactions? By: David Fanning on Fri, 05 May 2006 09:55

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