Many MPI APIs take an info argument for additional information passing. An info is an object which consists of many (key,value) pairs. Rmpi uses an internal memory to store an info object.
mpi.info.create creates a new info object.
mpi.info.free frees an info object and sets it to MPI\_INFO\_NULL.
mpi.info.get retrieves the value associated with key in an info.
mpi.info.set adds the key and value pair to info.
mpi.info.create(info = 0)
mpi.info.free(info = 0)
mpi.info.get(info = 0, key, valuelen)
mpi.info.set(info = 0, key, value)an info number.
a char (length 1).
the length (nchar) of a key
a char (length 1).
mpi.info.create, mpi.info.free, and mpi.info.set return
1 if success and 0 otherwise.
mpi.info.get returns the value (a char) for a given info and valuelen.