.. _mpi_win_wait:


MPI_Win_wait
============

.. include_body

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

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.. include:: ./bindings/mpi_win_wait.rst

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
------

.. include:: ./ERRORS.rst

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