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MPI_File_get_view - Returns the process’s view of data in the file.
C Syntax
#include <mpi.h>
int MPI_File_get_view(MPI_File fh, MPI_Offset *disp,
MPI_Datatype *etype, MPI_Datatype *filetype,
char *datarep)
INCLUDE ’mpif.h’
MPI_FILE_GET_VIEW(FH, DISP, ETYPE,
FILETYPE, DATAREP, IERROR)
INTEGER FH, ETYPE, FILETYPE, IERROR
CHARACTER*(*) DATAREP
INTEGER(KIND=MPI_OFFSET_KIND) DISP
#include <mpi.h>
void MPI::File::Get_view(MPI::Offset& disp,
MPI::Datatype& etype,
MPI::Datatype& filetype, char* datarep) const
- fh
- File handle (handle).
- disp
- Displacement
(integer).
- etype
- Elementary data type (handle).
- filetype
- File type (handle).
See Restrictions, below.
- datarep
- Data representation (string).
- IERROR
- Fortran
only: Error status (integer).
The MPI_File_get_view routine
returns the process’s view of the data in the file. The current values of
the displacement, etype, and filetype are returned in disp, etype, and
filetype, respectively.
The MPI_File_get_view interface allows the user
to pass a data-representation string via the datarep argument.
The MPI standard prescribes portable Fortran syntax for the DISP argument
only for Fortran 90. FORTRAN 77 users may use the non-portable syntax.
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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