On Thu, Dec 19, 2013 at 11:06 AM, Wesley Bland <wbland@mcs.anl.gov> wrote:
* Function to query the status of a communicator (is it revoked or not).
        * If this were done via a communicator attribute, it would be the only one I’m aware of that provides information to the user that is set by the library. All others are stored by the user and retrieved by the user.
        * Do we want to add a new API to take care of this, or can we confirm that it’s ok to do this via an attribute?

Sorry, I guess I was thinking of RMA when I suggested this; I don't know if it's feasible to use communicator attributes in this way.  MPI_Win_get_attr() has several predefined keys for querying window properties, e.g. MPI_WIN_BASE, etc.  Described in section 11.2.6 in MPI 3.0.

 ~Jim.