MPI_Keyval_free - Frees the attribute key for the
       communicator cache attribute


SYNOPSIS

       C:

            #include <mpi.h>

            int MPI_Keyval_free ( keyval )
            int *keyval;

       C++:

            #include <mpi.h>

            void Comm::Free_keyval(
            int&              comm_keyval)

       Fortran:

            INCLUDE "mpif.h" (or USE MPI)

            INTEGER keyval, ierror

            CALL MPI_KEYVAL_FREE(keyval, ierror)


STANDARDS

       This release implements the MPI 1.2 standard, as
       documented by the MPI Forum in the spring 1997 release of
       MPI:  A Message Passing Interface Standard.


DESCRIPTION

       The MPI_Keyval_free routine frees the attribute key for
       the communicator cache attribute.  This routine accepts
       the following parameter:

       keyval    Frees the integer key value (integer)

       ierror    Specifies the return code value for successful
                 completion, which is in MPI_SUCCESS.
                 MPI_SUCCESS is defined in the mpif.h file.


NOTES

       Key values are global (they can be used with any and all
       communicators).


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