NAME

       MPI_Win_flush,  MPI_Win_flush_all  -  Complete  all outstanding RMA operations at both the origin and the
       target

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_Win_flush (int rank, MPI_Win win)

       int MPI_Win_flush_all (MPI_Win win)

Fortran Syntax

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

       MPI_WIN_FLUSH_ALL(WIN, IERROR)
            INTEGER WIN, IERROR

Fortran 2008 Syntax

       USE mpi_f08
       MPI_Win_flush(rank, win, ierror)
            INTEGER, INTENT(IN) :: rank
            TYPE(MPI_Win), INTENT(IN) :: win
            INTEGER, OPTIONAL, INTENT(OUT) :: ierror

       MPI_Win_flush_all(win, ierror)
            TYPE(MPI_Win), INTENT(IN) :: win
            INTEGER, OPTIONAL, INTENT(OUT) :: ierror

INPUT PARAMETERS

       rank      Rank of window (nonnegative integer).

       win       Window object (handle).

OUTPUT PARAMETER

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_Win_flush completes all outstanding RMA operations initiated by the calling  process  to  the  target
       rank  on  the  specified  window.  The  operations  are  completed  both at the origin and at the target.
       MPI_Win_flush_all completes all outstanding RMA operations to all targets.

       Can only be called from within a passive target epoch.

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.

SEE ALSO

       MPI_Win_flush_local MPI_Win_lock MPI_Win_lock_all

4.1.6                                             Sep 30, 2023                                  MPI_Win_flush(3)