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Re: Memory Cleanup-- Messy structure [message #71467 is a reply to message #71382]

Thu, 17 June 2010 17:10

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

On Jun 17, 12:43 pm, pp <pp.pente...@gmail.com> wrote:
> On Jun 17, 12:45 pm, Craig Markwardt <craig.markwa...@gmail.com>
> wrote:
>
>> On Jun 16, 1:50 pm, Ed Hyer <ejh...@gmail.com> wrote:
>
>>> Since I'm not a real programmer, I still consider pointers to be kinda
>>> voodoo. Can someone patiently explain how I manually clean up the
>>> memory in this case?
>
>> I still think RSI/Kodak/ITT dropped the ball on the design of this.
>> IDL is a high level language, not a low level language - "4th
>> generation" right? IDL should be cleaning up messes like this, not
>> us.
>
> I think it is proper for the times when IDL originated, when it was
> too expensive to do automatic garbage collection. IDL 8 has it (it can
> be switched off), though one could argue that it should not have taken
> so long.

Uh, IDL "pointers" originated in IDL 5.0, ten years ago when all the
other scripting languages did automatic garbage collection.

I don't understand how it could be too expensive. The IDL interpreter
has precise knowledge and control of when variables go out of scope.
Dealing with cycles is its own problem, but basic garbage collection
should have been implemented from the start.

Now we are stuck with many years of maintaining meticulous pointer
allocation/deallocation discipline until IDL 5-6-7 are completely
obsolete.

Craig

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[Message index]

		Re: Memory Cleanup-- Messy structure By: penteado on Thu, 17 June 2010 09:43
		Re: Memory Cleanup-- Messy structure By: Craig Markwardt on Thu, 17 June 2010 08:45
		Re: Memory Cleanup-- Messy structure By: rogass on Thu, 17 June 2010 01:46
		Re: Memory Cleanup-- Messy structure By: MarioIncandenza on Wed, 16 June 2010 14:53
		Re: Memory Cleanup-- Messy structure By: rogass on Wed, 16 June 2010 14:16
		Re: Memory Cleanup-- Messy structure By: rogass on Thu, 17 June 2010 23:47
		Re: Memory Cleanup-- Messy structure By: Craig Markwardt on Thu, 17 June 2010 17:10

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