MPI_File_get_size(3)

NAME
MPI_File_get_size - Returns the current size of the file.

SYNTAX

C Syntax
#include <mpi.h>
int MPI_File_get_size(MPI_File fh, MPI_Offset *size)

INPUT PARAMETERS

fh  File handle (handle).

size
    Size of the file in bytes (integer).

OUTPUT PARAMETER

IERROR
    Fortran only: Error status (integer).

DESCRIPTION
MPI_File_get_size returns, in size , the current size in bytes of the file associated with the file handle fh. Note that the file size returned by Solaris may not represent the number of bytes physically allocated for the file in those cases where all bytes in this file have not been written at least once.

FORTRAN 77 NOTES
The MPI standard prescribes portable Fortran syntax for the SIZE argument only for Fortran 90. Sun FORTRAN 77 users may use the non-portable syntax

     INTEGER*MPI_OFFSET_KIND SIZE

where MPI_ADDRESS_KIND is a constant defined in mpif.h and gives the length of the declared integer in bytes.

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.

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.

SEE ALSO
MPI_File_preallocate