Retain VALUE from C extension

ruby-talk
1

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;
}

2

Hi,

···

In message "Re: retain VALUE from C extension" on Thu, 11 Oct 2007 00:29:47 +0900, "Gaspard Bucher" <gaspard@teti.ch> 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.

3

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