openmpi/ompi/mpi/man/man3/MPI_File_get_position.3in

.\"Copyright 2010 Cisco Systems, Inc.  All rights reserved.
.\"Copyright 2006-2008 Sun Microsystems, Inc.
.\" Copyright (c) 1996 Thinking Machines Corporation
.TH MPI_File_get_position 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
.SH NAME
\fBMPI_File_get_position\fP \- Returns the current position of the individual file pointer.

.SH SYNTAX
.ft R
.nf
C Syntax
    #include <mpi.h>
    int MPI_File_get_position(MPI_File \fIfh\fP, MPI_Offset \fI*offset\fP)

Fortran Syntax (see FORTRAN 77 NOTES)
    INCLUDE 'mpif.h'
    MPI_FILE_GET_POSITION(\fIFH\fP,\fI OFFSET\fP,\fI IERROR\fP)
    	      INTEGER \fIFH, IERROR\fP
    	      INTEGER(KIND=MPI_OFFSET_KIND) \fIOFFSET\fP

.SH C++ Syntax
.nf
#include <mpi.h>
MPI::Offset MPI::File::Get_position() const

.SH INPUT PARAMETER
.ft R
.TP 1i
fh    
File handle (handle).

.SH OUTPUT PARAMETERS
.ft R
.TP 1i
offset
Offset of the individual file pointer (integer).
.TP 1i
IERROR
Fortran only: Error status (integer). 

.SH DESCRIPTION
.ft R
MPI_File_get_position returns, in 
.I offset,
the current position of the individual file pointer in 
.I etype 
units relative to the current displacement and file type. 

.SH FORTRAN 77 NOTES
.ft R
The MPI standard prescribes portable Fortran syntax for
the \fIOFFSET\fP argument only for Fortran 90. Sun FORTRAN 77
users may use the non-portable syntax
.sp
.nf
     INTEGER*MPI_OFFSET_KIND \fIOFFSET\fP
.fi
.sp
where MPI_ADDRESS_KIND is a constant defined in mpif.h
and gives the length of the declared integer in bytes.

.SH ERRORS
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.
.sp
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.