Manpages - MPI_Type_get_attr.3

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

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

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