.\"Copyright 2007-2008 Sun Microsystems, Inc.
.\" Copyright (c) 1996 Thinking Machines Corporation
.TH MPI_Win_free 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
.SH NAME
\fBMPI_Win_free\fP \- Frees the window object and returns a null handle.

.SH SYNTAX
.ft R
.SH C Syntax
.nf
#include <mpi.h>
int MPI_Win_free(MPI_Win *\fIwin\fP)

.SH Fortran Syntax
.nf
INCLUDE 'mpif.h'
MPI_WIN_FREE(\fIWIN, IERROR\fP)
	INTEGER \fIWIN, IERROR\fP

.SH C++ Syntax
.nf
#include <mpi.h>
void MPI::Win::Free()

.SH INPUT/OUTPUT PARAMETER
.ft R
.TP 1i
win
Window object (handle). 

.SH OUTPUT PARAMETER
.ft R
.TP 1i
IERROR
Fortran only: Error status (integer). 

.SH DESCRIPTION
.ft R
MPI_Win_free frees the window object \fIwin\fP and returns a null handle (equal to MPI_WIN_NULL). This collective call is executed by all processes in the group associated with \fIwin\fP. It can be invoked by a process only after it has completed its involvement in RMA communications on window \fIwin\fP, that is, the process has called MPI_Win_fence, or called MPI_Win_unlock to match a previous call to MPI_Win_lock. When the call returns, the window memory can be freed.

.SH 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.
.sp
Before the error value is returned, the current MPI error handler is
called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.  

.SH SEE ALSO
MPI_Win_create
MPI_Win_fence
MPI_Win_unlock
.br