NAME

       MPI_Attr_get - Retrieves attribute value by key -- use of this routine is deprecated.

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_Attr_get(MPI_Comm comm, int keyval,void *attribute_val,
            int *flag )

Fortran Syntax

       INCLUDE 'mpif.h'
       MPI_ATTR_GET(COMM, KEYVAL, ATTRIBUTE_VAL, FLAG, IERROR)
            INTEGER   COMM, KEYVAL, ATTRIBUTE_VAL, IERROR
            LOGICAL   FLAG

INPUT PARAMETERS

       comm      Communicator to which attribute is attached (handle).

       keyval
                  Key value (integer).

OUTPUT PARAMETERS

       attribute_val
                 Attribute value, unless flag = false.

       flag      True  if  an  attribute value was extracted; false if no attribute is associated
                 with the key.

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       Note that use of this routine is deprecated as of MPI-2, and was deleted in MPI-3.  Please
       use MPI_Comm_create_attr.  This function does not have a C++ or mpi_f08 binding.

       Retrieves  attribute  value  by  key.  The call is erroneous if there is no key with value
       keyval. On the other hand, the call is correct if the key value exists, but  no  attribute
       is  attached  on  comm  for  that  key;  in  such  case, the call returns flag = false. In
       particular MPI_KEYVAL_INVALID is an erroneous key value.

ERRORS

       Almost all MPI routines return an error value; C routines as the value of the function and
       Fortran  routines in the last argument. C++ functions do not return errors. If the default
       error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then  on  error  the  C++  exception
       mechanism will be used to throw an MPI::Exception object.

       Before  the  error value is returned, the current MPI error handler is called. By default,
       this error handler aborts the MPI job, except for I/O function errors. The  error  handler
       may    be   changed   with   MPI_Comm_set_errhandler;   the   predefined   error   handler
       MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not
       guarantee that an MPI program can continue past an error.

SEE ALSO

       MPI_Comm_get_attr