int cpg_membership_get(cpg_handle_t handle, struct cpg_name *groupName, struct cpg_address *member_list, int *member_list_entries);
function is used to determine the current processes in the configuration. You probably will not
need to call this function much as one of the first confchg callbacks you will get will be from
the cpg_join() function containing your process.
is used to reference the cpg instantiation.
will return the name of the group
will return the list of processors in the current membership.
should be set with the size of member_list and will return the size of the
member_list after return from the function.