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Re: dynamic memory in call_external [message #14172 is a reply to message #14157]

Mon, 25 January 1999 00:00

David Foster
Messages: 341
Registered: January 1996

Senior Member

Vapuser wrote:
>
> I have someone in my office who wants to know:
>
> Is it advisable to create and destroy memory within a CALL_EXTERNAL
> routine? (that is, can one safely use malloc and free?) Or must one
> make the routine(s) in question LINKIMAGE routines and the idl memory
> management routines (IDL_MEMAlloc, IDL_MEMfree and IDL_GetScratch)
> available in that environment.

I have used [m|c]alloc() and free() in CALL_EXTERNAL modules with no
problems, usually for relatively small chunks of memory. But of course
this is only for variables within the C module; you can't allocate
memory within the C module and pass it back to IDL.

Dave
--

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
David S. Foster Univ. of California, San Diego
Programmer/Analyst Brain Image Analysis Laboratory
foster@bial1.ucsd.edu Department of Psychiatry
(619) 622-5892 8950 Via La Jolla Drive, Suite 2240
La Jolla, CA 92037
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~

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[Message index]

		Re: dynamic memory in call_external By: Vapuser on Tue, 26 January 1999 00:00
		Re: dynamic memory in call_external By: David Foster on Tue, 26 January 1999 00:00
		Re: dynamic memory in call_external By: rivers on Tue, 26 January 1999 00:00
		Re: dynamic memory in call_external By: korpela on Tue, 26 January 1999 00:00
		Re: dynamic memory in call_external By: David Foster on Mon, 25 January 1999 00:00

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