Probe and Cancel

Status Comm.Iprobe(int source, int tag)

source	source rank
tag	tag value
returns:	status object or null reference

Check if there is an incoming message matching the pattern specified. Java binding of the MPI operation MPI_IPROBE. If such a message is currently available, a status object similar to the return value of a matching Recv operation is returned. Otherwise a null reference is returned.

Status Comm.Probe(int source, int tag)

source	source rank
tag	tag value
returns:	status object or null reference

Wait until there is an incoming message matching the pattern specified. Java binding of the MPI operation MPI_PROBE. Returns a status object similar to the return value of a matching Recv operation.

void Request.Cancel()

Mark a pending nonblocking communication for cancellation. Java binding of the MPI operation MPI_CANCEL.

boolean Status.Test_cancelled()

returns:

true if the operation was succesfully cancelled, false otherwise

Test if communication was cancelled. Java binding of the MPI operation MPI_TEST_CANCELLED.