MPI_File_get_type_extent(3)MPI_File_get_type_extent(3)NAMEMPI_File_get_type_extent - Returns the extent of datatype in the file
SYNOPSIS
C:
#include "mpi.h"
int MPI_File_get_type_extent(MPI_File fh, MPI_Datatype
datatype, MPI_Aint *extent)
Fortran:
INCLUDE "mpif.h" (or USE MPI)
INTEGER fh, datatype, ierror
INTEGER(KIND=MPI_ADDRESS_KIND) extent
CALL MPI_FILE_GET_TYPE_EXTENT(fh, datatype, extent,
ierror)
DESCRIPTION
The MPI_File_get_type_extent routine returns the extent of datatype in
the fh file. This extent will be the same for all processes accessing the
fh file. If the current view uses a user-defined data representation,
MPI uses the dtype_file_extent_fn callback to calculate the extent.
In the case of user-defined data representations, the extent of a derived
datatype can be calculated by first using dtype_file_extent_fn to
determine the extents of the predefined datatypes in this derived
datatype.
The MPI_File_get_type_extent routine accepts the following arguments:
fh Specifies the file handle (handle)
datatype Specifies the datatype (handle)
extent Returns the extent of the datatype (nonnegative 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 for Fortran
All MPI objects (for example, MPI_Datatype, MPI_Comm, MPI_File) are of
type INTEGER.
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MPI_File_get_type_extent(3)MPI_File_get_type_extent(3)SEE ALSOMPI_File_open(3), MPI_IO(3)
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