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

.SH NAME

MPI_File_write_at \-  Write using explicit offset 

.SH SYNOPSIS

.nf

int MPI_File_write_at(MPI_File fh, MPI_Offset offset, ROMIO_CONST void *buf,

int count, MPI_Datatype datatype, MPI_Status * status)

.fi

.SH INPUT PARAMETERS

.PD 0

.TP

.B fh 

- file handle (handle)

.PD 1

.PD 0

.TP

.B offset 

- file offset (nonnegative integer)

.PD 1

.PD 0

.TP

.B buf 

- initial address of buffer (choice)

.PD 1

.PD 0

.TP

.B count 

- number of elements in buffer (nonnegative integer)

.PD 1

.PD 0

.TP

.B datatype 

- datatype of each buffer element (handle)

.PD 1

.SH OUTPUT PARAMETERS

.PD 0

.TP

.B status 

- status object (Status)

.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.