On Tue, 06 Mar 2007 12:03:05 -0800 David Brown <[EMAIL PROTECTED]> wrote:
> I've noticed quite a few pages referencing constructs such as: > > var :: MVar ([Foo]) > var = unsafePerformIO (newMVar ([])) > > and the likes. Is there a danger of different uses of 'var' getting > new MVars instead of all sharing one. > > Having a reliable way to create a piece of global state would be very > convenient. This operation is unsafe by definition. I use it extensively, without problems. The "unsafe" in the name reminds you that there are situations for which the function is inappropriate, but all of my deployed commercial programs have functionality of this sort. Understand the risk, but don't hesitate to use it. Seth Kurtzberg > > Dave > > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users@haskell.org > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users > _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
