OpenEuphoria

Re: Euphoria Standard Library on UBoard

• Posted by Alexander Toresson <alexander.toresson at gmail.com> Jul 28, 2005
• 557 views

Juergen Luethje wrote:
> 
> Jason Gade wrote:
> 
> > Tommy Carlier wrote:
> >
> >> Here are some more suggestions I have for ESL:
> 
> <snip>
> 
> >> - an enumeration-mechanism: here's how it was done in Win4Eu:
> 
> <snip>
> 
> > I don't know if it can be avoided, but library functions probably should
> > not keep state information; that is one thing I realized after
> > advocating an error-handling mechanism. It is also something that I am
> > considering in my foreach library which if it is not very simple would
> > require the keeping of state information.
> >
> > If the ESL is to grow beyond the current Euphoria into a multi-threading
> > version then keeping state information in library variables will be a
> > last-resort mechanism because of race conditions and complications.
> 
> If we follow the rule "library functions should not keep state information",
> then we can't implement any 'enum()' function. Is this right or wrong?
> 

Solution: create a mutex which is locked when enum() and the other functions in
enum.e are invoked, and unlocked at the end of those.

Regards, Alexander Toresson