From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-03-28T17:40:29+09:00
Subject: Re: [Q]  Caveats of rb_global_variable() ?

On Fri, Mar 28, 2003 at 03:16:18PM +0900, Julian Snitow wrote:
> Thanks.  Can rb_gc_unregister_adddress() be safely called on an address 
> that wasn't necessarily registered in the first place?  If so, I can 
> solve my problem neatly.

You were lucky, problem solved :-)

void
rb_gc_unregister_address(addr)
    VALUE *addr;
{
    struct gc_list *tmp = global_List;

    if (tmp->varptr == addr) {
        global_List = tmp->next;
        RUBY_CRITICAL(free(tmp));
        return;
    }
    while (tmp->next) {
        if (tmp->next->varptr == addr) {
            struct gc_list *t = tmp->next;

            tmp->next = tmp->next->next;
            RUBY_CRITICAL(free(t));
            break;
        }
        tmp = tmp->next;
    }
}

Nothing happens if it wasn't registered before.

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