MPI_Keyval_create

--- Generates a new attribute key

Input Parameters

copy_fn: Copy callback function for keyval

delete_fn: Delete callback function for keyval

extra_state: Extra state for callback functions

Output Parameter

keyval: key value for future access (integer)

Notes

Key values are global (available for any and all communicators).

There are subtle differences between C and Fortran that require that the copy_fn be written in the same language that MPI_Keyval_create is called from. This should not be a problem for most users; only programers using both Fortran and C in the same program need to be sure that they follow this rule.

Synopsis


#include "mpi.h"
int MPI_Keyval_create ( copy_fn, delete_fn, keyval, extra_state )
MPI_Copy_function   *copy_fn;
MPI_Delete_function *delete_fn;
int                 *keyval;
void                *extra_state;

Location: keyval_create.c