Manpages - MPI_File_get_byte_offset.3

MPI_File_get_byte_offset - Converts a view-relative offset into an absolute byte position.

  #include <mpi.h>
  int MPI_File_get_byte_offset(MPI_File fh, MPI_Offset offset,
  	MPI_Offset *disp)

  USE MPI
  ! or the older form: INCLUDE 'mpif.h'
  MPI_FILE_GET_BYTE_OFFSET(FH, OFFSET, DISP, IERROR)
  	INTEGER	FH, IERROR
  	INTEGER(KIND=MPI_OFFSET_KIND)	OFFSET, DISP

  USE mpi_f08
  MPI_File_get_byte_offset(fh, offset, disp, ierror)
  	TYPE(MPI_File), INTENT(IN) :: fh
  	INTEGER(KIND=MPI_OFFSET_KIND), INTENT(IN) :: offset
  	INTEGER(KIND=MPI_OFFSET_KIND), INTENT(OUT) :: disp
  	INTEGER, OPTIONAL, INTENT(OUT) :: ierror

  #include <mpi.h>
  MPI::Offset MPI::File::Get_byte_offset(const MPI::Offset disp)
  	const

fh

File handle (handle).

offset

Offset (integer).

disp

Absolute byte position of offset (integer).

IERROR

Fortran only: Error status (integer).

MPI_File_get_byte_offset converts an offset specified for the current view to its corresponding displacement value, or absolute byte position, from the beginning of the file. The absolute byte position of offset relative to the current view of fh is returned in disp.

The MPI standard prescribes portable Fortran syntax for the OFFSET and DISP arguments only for Fortran 90. Sun FORTRAN 77 users may use the non-portable syntax

       INTEGER*MPI_OFFSET_KIND OFFSET
  or
       INTEGER*MPI_OFFSET_KIND DISP

where MPI_OFFSET_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. For MPI I/O function errors, the default error handler is set to MPI_ERRORS_RETURN. The error handler may be changed with MPI_File_set_errhandler; the predefined error handler MPI_ERRORS_ARE_FATAL may be used to make I/O errors fatal. Note that MPI does not guarantee that an MPI program can continue past an error.