Retain VALUE from C extension

How do I tell ruby to increment it’s garbage collector if I want to
keep hold of a VALUE in a C extension.

example:

VALUE message;

static VALUE store_message(VALUE self, VALUE msg) {
// tell ruby to retain…
// rb_retain(msg) ?
message = msg;
return Qnil;
}

Hi,

In message “Re: retain VALUE from C extension”
on Thu, 11 Oct 2007 00:29:47 +0900, “Gaspard B.”
[email protected] writes:

|How do I tell ruby to increment it’s garbage collector if I want to
|keep hold of a VALUE in a C extension.

I’m not sure what you mean by ‘increment’ or ‘retain’, but
rb_global_variable() may be the answer. See README.EXT.

          matz.

Yes, I think this is what I was looking for. As I understand, this
“declares” the address as needing “global marking” by adding it to
global_List.
/* mark protected global variables */
for (list = global_List; list; list = list->next) {
rb_gc_mark_maybe(*list->varptr);
}

I’m not sure what you mean by ‘increment’ or ‘retain’, but
rb_global_variable() may be the answer. See README.EXT.

                                                    matz.

Effectivelly, “retain” (objective-C terminology) is not appropriate.
From what I understand the mark & sweep garbage collecting process is
quite different from the reference counting strategy I was familiar
with.

Thanks for the information.

Gaspard

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