On Fri, 4 May 2001, Artur Bergman wrote:
> > the shared attribute works in bleedperl, but it does not mean what you
> > think it means. search the archives for GvSHARED, in particular:
> > http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2001-02/msg00535.html
> > in a nutshell, GvSHARED GVs are not copied across perl_clone, and
> > piggyback the existing SvREADONLY checks for memory
> > savings. these `shared' GVs cannot be written to once marked as GvSHARED
>
> Unless one unmarks them and protect them using Mutexes. (just turn of
> readonly)
that is not what GvSHARED is designed for.
it is not possible to write to a GvSHARED GV from Perl without xs or
without trying really hard, in which case the user deserves the shot in
the foot they're giving themselves.
GvSHARED is designed to cut down on memory bloat, sharing data that is
normally used readonly already, for example:
- xsubs
- large hashes and arrays such as *EXPORT*
> Do you have the code that does this avaible somewhere?
i just put a copy here:
http://perl.apache.org/~dougm/solar-0.01.tar.gz
