17.2.442. MPI_Win_free

MPI_Win_free - Frees the window object and returns a null handle.

17.2.442.1. SYNTAX

17.2.442.1.1. C Syntax

#include <mpi.h>

int MPI_Win_free(MPI_Win *win)

17.2.442.1.2. Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_WIN_FREE(WIN, IERROR)
     INTEGER WIN, IERROR

17.2.442.1.3. Fortran 2008 Syntax

USE mpi_f08
MPI_Win_free(win, ierror)
     TYPE(MPI_Win), INTENT(INOUT) :: win
     INTEGER, OPTIONAL, INTENT(OUT) :: ierror

17.2.442.2. INPUT/OUTPUT PARAMETER

  • win: Window object (handle).

17.2.442.3. OUTPUT PARAMETER

  • IERROR: Fortran only: Error status (integer).

17.2.442.4. DESCRIPTION

MPI_Win_free frees the window object win and returns a null handle (equal to MPI_WIN_NULL). This collective call is executed by all processes in the group associated with win. It can be invoked by a process only after it has completed its involvement in RMA communications on window win, 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.

17.2.442.5. NOTES

If the window was created through MPI_Win_allocate or MPI_Win_allocate_shared then the memory buffer allocated in that call will be freed when calling MPI_Win_free.

17.2.442.6. ERRORS

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument.

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.