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MPI_Win_wait.3.rst

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MPI_Win_wait

:ref:`MPI_Win_wait` - Completes an RMA exposure epoch started by a call to :ref:`MPI_Win_post` on win

SYNTAX

C Syntax

#include <mpi.h>

int MPI_Win_wait(MPI_Win win)

Fortran Syntax

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

Fortran 2008 Syntax

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

INPUT PARAMETERS

  • win: Window object (handle).

OUTPUT PARAMETERS

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

DESCRIPTION

:ref:`MPI_Win_wait` is a one-sided MPI communication synchronization call that completes an RMA exposure epoch started by a call to :ref:`MPI_Win_post` on win. This call matches calls to MPI_Win_complete(win) issued by each of the processes that were granted access to the window during this epoch. The call to :ref:`MPI_Win_wait` blocks until all matching calls to :ref:`MPI_Win_complete` have occurred. This guarantees that all these origin processes have completed their RMA accesses to the local window. When the call returns, all these RMA accesses will have completed at the target window.

ERRORS

.. seealso::
   * :ref:`MPI_Win_post`