Re: Boost threading library

From: williamkempf_at_[hidden]
Date: 2001-03-19 17:16:47

--- In boost_at_y..., Lie-Quan Lee <llee1_at_l...> wrote:
> At Mon, 19 Mar 2001 21:47:37 -0000,
> williamkempf_at_h... wrote:
> > 
> > --- In boost_at_y..., "Mark Rodgers" <mark.rodgers_at_c...> wrote:
> > > From: "Lie-Quan Lee" <llee1_at_l...>
> > > > Would be better to have a traits to get the type of locks 
like:
> > > >   typedef typename lock_categories<mutex>::lock      Guard;
> > > >   typedef typename lock_categories<mutex>::trylock   TryGuard;
> > > >   typedef typename lock_categories<mutex>::timedlock 
TimedGuard;
> > > > 
> > > > I did a quick search in boost archive and did not see a 
> > discussion on
> > > > that in both discussion phases(one was last summer, the other 
is 
> > since
> > > > last week). Maybe I missed it.
> > > 
> > > I made a suggestion somewhat along those lines in 
> > > 
> > > http://groups.yahoo.com/group/boost/message/4409
> > > 
> > > I think perhaps it is worth pursuing this topic.
> > 
> 
> It is interesting that Mark pointed the similarities between Mutexes
> and Containers and Locks and Iterators. I do not know if "TryLock 
did
> actually refine Lock" is right way to go since I did not catch the
> semantic meaning yet.
> 
> > A "lock_tag" might be useful.  I'm not sure that full blown 
traits 
> > would be, at least with the types as defined today.  Can you 
> > illustrate how these concepts could be useful?
> 
> I think that all general comments of using traits can be applied
> here. For exmaple, using "mutex::lock" put a stronger requirement on
> mutex type. 

I'm probably being dense, but I don't see how.  Could you please 
illustrate with some code?

Bill Kempf