Re: [WWdevel] Re: [WWcvs] webwork-modperl: Sam changed open(LOG,...) to open(my $log, ...), but

[Davide P. C. <dp...@un...>]

> here are the file-scoped lexicals that are hanging around,  
> potentially causing similar problems. (That is, if they get  
> modified. If they're just being used as constants, then in most  
> cases we can replace them with 'use constant', or maybe use a real  
> constant class that uses a tied scalar.) Fortunately, most of it is  
> in WebworkWebservice, which isn't production code yet, or in PG,  
> where I'm not sure if it's a problem, since every problem has its  
> own environment.

The ones in Parser and Value are almost all constants, plus a few  
that are computed and then retain their same value.  There is one  
exception, however, which is is $Value::context, that is a reference  
to the current Context hash.  (This is changed by the Context()  
function.)  It would take some doing to convert that to a thread-safe  
mechanism, I think.

Davide