From: ts <decoux@...>
Date: 2004-03-08T00:46:48+09:00
Subject: Re: freeze, frozen? in extensions

>>>>> "T" == Tim Hunter <cyclists@nc.rr.com> writes:

T> Today I see that I my original post was terse to the point of being
T> incomprehensible. What I was trying to ask was "How do I support the
T> freeze method in my C extension? That is, suppose a script calls the
T> freeze method on one of my objects, and then uses a method that modifies
T> that object. What should I do?"

 raise an error.

T> To confirm my plan I started looking at the code for the standard
T> libraries that are written in C, but I saw very few calls to
T> rb_check_frozen. This makes me wonder, have I misunderstood how to support
T> frozen objects in C?

 No, but like said previously by "daz" <dooby@d10.karoo.co.uk>, in many
 case a C extension will use the standard API function and ruby will make
 the test. Uf this is not the case add the test. For example, mmap has


svg% grep frozen mmap-0.2.4/*.c
        rb_error_frozen("mmap");                                \
        if (t_mm->flag & MM_FROZEN) rb_error_frozen("mmap");
    if (t_mm->flag & MM_FROZEN) rb_error_frozen("mmap");
        rb_error_frozen("mmap");
    if (str->flag & MM_FROZEN) rb_error_frozen("mmap");
svg% 


Guy Decoux