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Re: Memory allocation problem: [message #11009 is a reply to message #10991]

Sun, 22 February 1998 00:00

Peter Mason
Messages: 145
Registered: June 1996

Senior Member

On Fri, 20 Feb 1998, I~nigo Garcia wrote:
> Well, I was afraid of something like this... I still find it a bug, whatever you
> say, they should find a way of freeing that memory !!! Can it be done with
> pointers ?? In a simple way, please, my brain is too small to fight with those
> beings.

Since version 5, IDL has been using a 3rd-party memory allocation library
called "SmartHeap". (At least, I know this is true for Win95 and suspect
it's true for other platforms.)
(Check out http://www.microquill.com/ for info on SmartHeap.)

SmartHeap functions differently on different platforms, especially with "large"
allocations (>64K). One would hope that a product like this would generally
be able to return large allocations to the operating system, but apparently
they haven't yet got this right for some operating systems.
Still, I'd say that RSI is on the right track using this stuff (mostly for
other reasons). If there was an easy-to-use solution to the memory-freeing
problem that some of IDL's platforms still exhibit, I'd expect it to be in
a product like this, sooner or later.

I don't think that there's a way around this right now.
I admit that I haven't tried to do this kind of thing, but from what I know,
if there was a solution (and it would be platform-specific) I think it would be
an ugly and very risky one involving C code and a sound knowledge of IDL
internals. Also, it would only address the variables you know about. IDL
goes through a lot of temporary variables, and it would still handle these its
own way.

Peter Mason

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[Message index]

		Re: Memory allocation problem: By: Dr. G. Scott Lett on Mon, 23 February 1998 00:00
		Re: Memory allocation problem: By: Karl Krieger on Mon, 23 February 1998 00:00
		Re: Memory allocation problem: By: Helge.Rebhan on Mon, 23 February 1998 00:00
		Re: Memory allocation problem: By: Peter Mason on Sun, 22 February 1998 00:00
		Re: Memory allocation problem: By: Dr. G. Scott Lett on Sat, 21 February 1998 00:00
		Re: Memory allocation problem: By: Inigo Garcia on Fri, 20 February 1998 00:00
		Re: Memory allocation problem: By: davidf on Fri, 20 February 1998 00:00

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