Sun, 9 Apr 2000 13:54:47 -0700, Sigbjorn Finne <[EMAIL PROTECTED]> pisze:
> > Wouldn't be nice to have such function?
>
> Have you tried using Concurrent.isEmptyMVar ?
isEmptyMVar is not enough to implement tryTakeMVar (but tryTakeMVar
would suffice for isEmptyMVar). Just after checking that it is empty
I can't safely take the value out of it, because it could be taken
by another thread right between and I will sleep for a long time then.
tryTakeMVar is a safe variant of isEmptyMVar. The equivalent of
pthread_mutex_trylock and Mutex::try_lock in Ruby.
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