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NAME

       MPI_COMM_DUP_FN -  Built-in MPI function to simple-mindedly copy communicator attributes.

SYNOPSIS

       #include <mpi.h>
       int MPI_COMM_DUP_FN(MPI_Comm comm, int key, void *extra,
                          void *attrin, void *attrout, int *flag)

INPUT PARAMETERS

       comm   - communicator (handle)
       key    - key value (integer)
       extra  - extra state
       attrin - in value for attribute

OUTPUT PARAMETERS

       attrout
              - out value for attribute
       flag   - 1 if attribute copied successfully, 0 otherwise (logical)

NOTES

       This  function  blindly  byte-copies  attributes  on  communicators.   It  is  the default
       atrribute-copying  function  for  communicators.   This  function   will   always   return
       MPI_SUCCESS , and flag will always be set to 1.

       The actual copy is performed by the code

       *((void **) attrout) = attrin;

       If this simple assignment is not sufficient for your attributes, you will need to reassign
       the  attribute-copying  function  on  relevant   keyvals   on   communicators   with   the
       MPI_Comm_keyval_create function.

NOTES FOR FORTRAN

       All  MPI  routines  in  Fortran  (except  for MPI_WTIME and MPI_WTICK ) have an additional
       argument ierr at the end of the argument list.  ierr  is  an  integer  and  has  the  same
       meaning  as  the  return  value  of  the  routine  in  C.   In  Fortran,  MPI routines are
       subroutines, and are invoked with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

SEE ALSO

       MPI_Comm_keyval_create

MORE INFORMATION

       For more information, please see the official MPI Forum web site, which contains the  text
       of both the MPI-1 and MPI-2 standards.  These documents contain detailed information about
       each MPI function (most of which is not duplicated in these man pages).

       http://www.mpi-forum.org/

ACKNOWLEDGEMENTS

       The LAM Team would like the thank the MPICH Team for the handy  program  to  generate  man
       pages   ("doctext"  from  ftp://ftp.mcs.anl.gov/pub/sowing/sowing.tar.gz  ),  the  initial
       formatting, and some initial text for most of the MPI-1 man pages.

LOCATION

       dupfn.c