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Dynamically creating C++ objects in DLM [message #33398]

Fri, 20 December 2002 16:21

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

It has been a slow day here so maybe this can stir up some passion :)

I have a few .dlm's where I declare a global C++ object and use that object
throughout the dlm. The dlm functions and procedures allow me to initialize
the object, do stuff with it, and destroy it. Easy enough.

The one limitation is that I only have one instance of the object available.
If I run a second instance of a program that uses that .dlm the two IDL
programs will overwrite the C++ object causing general mayhem (like using a
common block in IDL).

A solution to this problem would be dynamically creating the C++ object upon
initialization and returning a pointer to the object back to IDL. When
calling the dlm routines I could pass the pointer back to my dlm to gain
access to my object of interest.

My questions are:

How do I dynamically create a C++ object (I think I use "new" but am a
little unclear on the correct use)?

myObject *test = new myObject; //?????

How do I pass pointers back and forth between my DLM and IDL? Is it as
simple as passing a long?

return IDL_GetTmpLong(test); //Is it this easy?

If I do pass IDL a long representing my pointer, how do I use it when I pass
it back to my DLM? The compiler sees it as a long, not a pointer to an
object.

pointer = IDL_LongScalar(argv[0]); //receive the pointer address from
IDL
*pointer.Test(); //not the way to do it

Thanks for any thoughts.

-Rick

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[Message index]

		Dynamically creating C++ objects in DLM By: Rick Towler on Fri, 20 December 2002 16:21
		Re: Dynamically creating C++ objects in DLM By: Randall Skelton on Thu, 02 January 2003 10:55
		Re: Dynamically creating C++ objects in DLM By: Rick Towler on Thu, 02 January 2003 08:49
		Re: Dynamically creating C++ objects in DLM By: Nigel Wade on Thu, 02 January 2003 04:04

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