You have MPI_WINDOW_LOCK (a blocking lock acquisition call)
You have an MPI_WINDOW_TRYLOCK which returns true or false (as the
Don't you also want an MPI_WINDOW_ILOCK which returns a request which
one can later test or wait on ?
The request completes once the lock is claimed by this call. Such a
call would allow non-busy waiting for a lock, which is not possible
with the current calls.
Of course this may have implementation implications (like requiring a
global queue of lock requests somewhere.)
Also you say nothing about fairness of lock acquisition. (This may be
deliberate :-) ). Somwehere I think we should say something, even if
it is only that no fairness guarantees are given.
BBN UK Ltd
Phone : +44 117 9071438