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MPI_File_get_byte_offset - Converts a view-relative offset into an
absolute byte position.
C Syntax
#include <mpi.h>
int MPI_File_get_byte_offset(MPI_File fh, MPI_Offset offset,
MPI_Offset *disp)
INCLUDE ’mpif.h’
MPI_FILE_GET_BYTE_OFFSET(FH, OFFSET, DISP, IERROR)
INTEGER FH, IERROR
INTEGER(KIND=MPI_OFFSET_KIND) OFFSET, DISP
#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.
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