A question about scm_guard()

A question about scm_guard()

[Rients van Wijngaarden]

Hi,

I'm using guile in combination with C++ and I'm having some trouble with
garbage collection. Now I'm trying to use guards, to circumvent GC.

To make a guardian, I use 'scm_make_guardian([name of the guardian]);' and
all is fine.
The next step is to actually guard some objects, so I try to use:
'scm_guard([name of the guardian], [object to be guarded]);'

according to some sources this should work, but I get a compiling error:
"too few arguments to function `scm_unused_struct*
scm_guard(scm_unused_struct*, scm_unused_struct*, int)'"

so obviously, scm_guard needs a third argument of type int, but my
question is:
What is this int?

I hope somebody can help me...

Rients (the Netherlands)



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Re: A question about scm_guard()

[Kevin Ryde]

"Rients van Wijngaarden" <Rients.vanWijngaarden@phil.uu.nl> writes:
>
> so obviously, scm_guard needs a third argument of type int, but my
> question is:
> What is this int?

Hmm.  A flag saying whether you want an error thrown if the object is
already guarded.

Apparently scm_guard is going to be deprecated in the next release, in
favour of

	scm_call_1 (GUARDIAN, OBJECT)

the same as would be done from scheme code.  I think that would work
in 1.6 too (without trying it :-).


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