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MPI_Type_get_attr - Returns the attribute associated with a data
type.
#include <mpi.h>
int MPI_Type_get_attr(MPI_Datatype type, int type_keyval, void *attribute_val,
int *flag)
USE MPI
! or the older form: 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
USE mpi_f08
MPI_Type_get_attr(datatype, type_keyval, attribute_val, flag, ierror)
TYPE(MPI_Datatype), INTENT(IN) :: datatype
INTEGER, INTENT(IN) :: type_keyval
INTEGER(KIND=MPI_ADDRESS_KIND), INTENT(OUT) :: attribute_val
LOGICAL, INTENT(OUT) :: flag
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
- type
- Data type to which the attribute is attached (handle).
- type_keyval
- Key value (integer).
- attribute_val
- Attribute
value, unless flag = false
- flag
- "false" if no attribute is associated with
the key (logical).
- IERROR
- Fortran only: Error status (integer).
For
the given data type, MPI_Type_get_attr returns an attribute value that
corresponds to the specified key value.
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.
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.
MPI_Type_set_attr
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