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)
- 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
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