MPI_Type_get_attr(3)               Open MPI               MPI_Type_get_attr(3)



NAME
       MPI_Type_get_attr - Returns the attribute associated with a data type.


SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Type_get_attr(MPI_Datatype type, int type_keyval, void *attribute_val, int *flag)


Fortran Syntax (see FORTRAN 77 NOTES)
       INCLUDE 'mpif.h'
       MPI_TYPE_GET_ATTR(TYPE, TYPE_KEYVAL, ATTRIBUTE_VAL, FLAG, IERROR)
            INTEGER   TYPE, TYPE_KEYVAL, IERROR
            INTEGER(KIND=MPI_ADDRESS_KIND) ATTRIBUTE_VAL
            LOGICAL FLAG


C++ Syntax
       #include <mpi.h>
       bool MPI::Datatype::Get_attr(int type_keyval, void* attribute_val) const


INPUT PARAMETERS
       type      Data type to which the attribute is attached (handle).

       type_keyval
                 Key value (integer).


OUTPUT PARAMETERS
       attribute_val
                 Attribute value, unless flag = false

       flag      "false" if no attribute is associated with the key (logical).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       For the given data type, MPI_Type_get_attr returns an attribute value
       that corresponds to the specified key value.


FORTRAN 77 NOTES
       The MPI standard prescribes portable Fortran syntax for the
       ATTRIBUTE_VAL argument only for Fortran 90.  Sun FORTRAN 77 users may
       use the non-portable syntax

            INTEGER*MPI_ADDRESS_KIND ATTRIBUTE_VAL

       where MPI_ADDRESS_KIND is a constant defined in mpif.h and gives the
       length of the declared integer in bytes.


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_Type_set_attr



1.4.1                            Jan 14, 2010             MPI_Type_get_attr(3)
