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Re: Releasing memory in IDL [message #58225 is a reply to message #58224]

Wed, 23 January 2008 12:35

Jean H.
Messages: 472
Registered: July 2006

Senior Member

Jaime wrote:
> Thanks Jean,
>
> it helped me... but I was forced to call heap_gc and delete a couple
> of arrays (a=0) at the end, but still inside, of the clumpfind
> function. After that I still needed to call heap_gc after clumpfind is
> called.
>
> It looks still strange to me that I should all this to get some memory
> back... is there a way to avoid the memory leak?
>
> Best,
> Jaime

hum...
for regular variables (i.e. not pointers), they are released from memory
when you exit the pro or function... so setting "a=0" should change the
memory used IN the function, but should have no effect when the program
returns to a lower / main level. Indeed, this is correct provided that
a) the variable is not part of the argument of the function, or b)the
variable is not part of a common block.

To avoid memory leak... well... pointers need to be well defined and
cleaned up!

a = ptr_new(indgen(100000000000))
a = 0 ==> you just lost track of the indgen(100000000000) array!!! ...
but it is still in memory!

Jean

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[Message index]

		Re: Releasing memory in IDL By: Paul Van Delst[1] on Wed, 23 January 2008 13:15
		Re: Releasing memory in IDL By: Paul Van Delst[1] on Wed, 23 January 2008 13:12
		Re: Releasing memory in IDL By: David Fanning on Wed, 23 January 2008 13:02
		Re: Releasing memory in IDL By: Jean H. on Wed, 23 January 2008 12:35
		Re: Releasing memory in IDL By: Jaime on Wed, 23 January 2008 12:19
		Re: Releasing memory in IDL By: Jean H. on Wed, 23 January 2008 09:51
		Re: Releasing memory in IDL By: Jaime on Wed, 23 January 2008 13:28

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