Yes, I understand that, and as a result of MPI 1.1 we did change all of our
opaque MPI objects into integers. But I still don't understand why MPI_TYPE_DUP
as proposed would not add yet another level of indirection. (Sorry if I'm being
dense.) In our implementation, for example, a datatype handle is an index into
a table. Once we find the appropriate entry in the table, all of the needed
information is right there. Now, let's look at the struct that you mentioned:
Implementation_attr_cache * cache;
Implementation_datatype * datatype;
It seems to me that I must first index into one table to locate the proper
entry of the above type, and then follow the datatype pointer to get to the
What is the obvious point that I am missing here?
-- Eric Salo Silicon Graphics Inc. "Do you know what the (415)933-2998 2011 N. Shoreline Blvd, 8U-802 last Xon said, just email@example.com Mountain View, CA 94043-1389 before he died?"