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)¶
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
- 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