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)

Fortran Syntax (see FORTRAN 77 NOTES)

       USE MPI
       ! or the older form: INCLUDE 'mpif.h'
       MPI_FILE_GET_SIZE(FH, SIZE, IERROR)
            INTEGER   FH, ERROR
            INTEGER(KIND=MPI_OFFSET_KIND) SIZE

C++ Syntax

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

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

2.1.1                                             May 10, 2017                              MPI_File_get_size(3)