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.. _mpi_win_post:
MPI_Win_post
============
.. include_body
:ref:`MPI_Win_post` |mdash| Starts an RMA exposure epoch for the local window
associated with *win*
SYNTAX
------
C Syntax
^^^^^^^^
.. code-block:: c
#include <mpi.h>
int MPI_Win_post(MPI_Group group, int assert, MPI_Win win)
Fortran Syntax
^^^^^^^^^^^^^^
.. code-block:: fortran
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_WIN_POST(GROUP, ASSERT, WIN, IERROR)
INTEGER GROUP, ASSERT, WIN, IERROR
Fortran 2008 Syntax
^^^^^^^^^^^^^^^^^^^
.. code-block:: fortran
USE mpi_f08
MPI_Win_post(group, assert, win, ierror)
TYPE(MPI_Group), INTENT(IN) :: group
INTEGER, INTENT(IN) :: assert
TYPE(MPI_Win), INTENT(IN) :: win
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
INPUT PARAMETERS
----------------
* ``group``: The group of origin processes (handle)
* ``assert``: Program assertion (integer)
* ``win``: Window object (handle)
OUTPUT PARAMETERS
-----------------
* ``ierror``: Fortran only: Error status (integer).
DESCRIPTION
-----------
Starts an RMA exposure epoch for the local window associated with *win*.
Only the processes belonging to *group* should access the window with
RMA calls on *win* during this epoch. Each process in *group* must issue
a matching call to :ref:`MPI_Win_start`. :ref:`MPI_Win_post` does not block.
The *assert* argument is used to provide assertions on the context of
the call that may be used for various optimizations. A value of *assert*
^ 0 is always valid. The following assertion values are supported:
MPI_MODE_NOCHECK
The matching calls to :ref:`MPI_Win_start` have not yet occurred on any
origin processes when this call is made. This assertion must be
present for all matching :ref:`MPI_Win_start` calls if used.
MPI_MODE_NOSTORE
Informs that the local window was not updated by local stores or get
calls in the preceding epoch.
MPI_MODE_NOPUT
Informs that the local window will not be updated by put or
accummulate calls until the ensuing wait synchronization.
ERRORS
------
.. include:: ./ERRORS.rst
.. seealso::
* :ref:`MPI_Win_start`
* :ref:`MPI_Win_wait`
|
