.TH MPI_Win_Lock 3 "6/24/2006" "LAM/MPI 7.1.4" "LAM/MPI"
.SH NAME
MPI_Win_Lock \-  Starts an RMA access epoch 
.SH SYNOPSIS
.nf
#include <mpi.h>
int MPI_Win_lock(int lock_type, int rank, int assert, MPI_Win win)
.fi
.SH INPUT PARAMETERS
.PD 0
.TP
.B lock_type 
- either MPI_LOCK_EXCLUSIVE or MPI_LOCK_SHARED (state)
.PD 1
.PD 0
.TP
.B rank 
- rank of locked window (nonnegative integer)
.PD 1
.PD 0
.TP
.B assert 
- program assertion (integer)
.PD 1
.PD 0
.TP
.B win 
- window object (handle)
.PD 1

.SH NOTES

This function is currently not implemented in LAM/MPI.  It will return
an MPI_ERR_OTHER run time error.

.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.
.SH LOCATION
wlock.c