MPI_Win_post(3) 							MPI							   MPI_Win_post(3)

NAME

       MPI_Win_post -  Start an RMA exposure epoch

SYNOPSIS

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

INPUT PARAMETERS

       group  - group of origin processes (handle)
       assert - Used to optimize this call; zero may be used as a default.  See notes. (integer)
       win    - window object (handle)

NOTES

       The assert argument is used to indicate special conditions for the fence that an implementation may use to optimize the MPI_Win_post opera-
       tion.  The value zero is always correct.  Other assertion values may be or'ed together.	Assertions that are valid for MPI_Win_post are:

       MPI_MODE_NOCHECK
	      - the matching calls to MPI_WIN_START have not yet occurred on any origin processes when the call  to  MPI_WIN_POST  is  made.   The
	      nocheck option can be specified by a post call if and only if it is specified by each matching start call.
       MPI_MODE_NOSTORE
	      -  the  local  window was not updated by local stores (or local get or receive calls) since last synchronization. This may avoid the
	      need for cache synchronization at the post call.
       MPI_MODE_NOPUT
	      - the local window will not be updated by put or accumulate calls after the post call, until  the  ensuing  (wait)  synchronization.
	      This may avoid the need for cache synchronization at the wait call.

NOTES FOR FORTRAN

       All  MPI  routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list.  ierr
       is an integer and has the same meaning as the return value of the routine in C.	In Fortran, MPI routines are subroutines, and are  invoked
       with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

ERRORS

       All  MPI  routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in
       the last argument.  Before the value is returned, the current MPI error handler is called.  By default, this error handler aborts  the  MPI
       job.   The  error  handler  may	be  changed  with  MPI_Comm_set_errhandler  (for  communicators), MPI_File_set_errhandler (for files), and
       MPI_Win_set_errhandler (for RMA windows).  The MPI-1 routine MPI_Errhandler_set may be used but its  use  is  deprecated.   The	predefined
       error handler MPI_ERRORS_RETURN may be used to cause error values to be returned.  Note that MPI does not guarentee that an MPI program can
       continue past an error; however, MPI implementations will attempt to continue whenever possible.

       MPI_SUCCESS
	      - No error; MPI routine completed successfully.

LOCATION

       win_post.c

								     5/20/2010							   MPI_Win_post(3)