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MPI_Win_post

:ref:`MPI_Win_post` |mdash| Starts an RMA exposure epoch for the local window associated with win

SYNTAX

C Syntax

#include <mpi.h>

int MPI_Win_post(MPI_Group group, int assert, MPI_Win win)

Fortran Syntax

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

Fortran 2008 Syntax

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

.. seealso::
   * :ref:`MPI_Win_start`
   * :ref:`MPI_Win_wait`