.TH MPI_File_preallocate 3 "11/12/2019" " " "MPI"

.SH NAME

MPI_File_preallocate \-  Preallocates storage space for a file 

.SH SYNOPSIS

.nf

int MPI_File_preallocate(MPI_File fh, MPI_Offset size)

.fi

.SH INPUT PARAMETERS

.PD 0

.TP

.B fh 

- file handle (handle)

.PD 1

.PD 0

.TP

.B size 

- size to preallocate (nonnegative integer)

.PD 1

.SH NOTES FOR FORTRAN

All MPI routines in Fortran (except for 

.I MPI_WTIME

and 

.I MPI_WTICK

) have

an additional argument 

.I ierr

at the end of the argument list.  

.I ierr

is an integer and has the same meaning as the return value of the routine

in C.  In Fortran, MPI routines are subroutines, and are invoked with the

.I call

statement.

All MPI objects (e.g., 

.I MPI_Datatype

, 

.I MPI_Comm

) are of type 

.I INTEGER

in Fortran.