:ref:`MPI_Win_post` - Starts an RMA exposure epoch for the local window associated with win
#include <mpi.h>
int MPI_Win_post(MPI_Group group, int assert, MPI_Win win)
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_WIN_POST(GROUP, ASSERT, WIN, IERROR)
INTEGER GROUP, ASSERT, WIN, IERROR
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
group
: The group of origin processes (handle)assert
: Program assertion (integer)win
: Window object (handle)
ierror
: Fortran only: Error status (integer).
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.
.. seealso::
* :ref:`MPI_Win_start`
* :ref:`MPI_Win_wait`