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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 -	program	assertion (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 oper-
       ation.  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) synchroniza-
	      tion.  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 com-
       municators),  MPI_File_set_errhandler  (for files), and MPI_Win_set_er-
       rhandler	(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 guarantee that an MPI program can continue past
       an error; however, MPI implementations will attempt to  continue	 when-
       ever possible.

       MPI_SUCCESS
	      -	No error; MPI routine completed	successfully.
       MPI_ERR_GROUP
	      -	Null or	invalid	group passed to	function.
       MPI_ERR_WIN
	      -	Invalid	MPI window object
       MPI_ERR_OTHER
	      -	 Other	error;	use  MPI_Error_string  to get more information
	      about this error code.

				   2/3/2025		       MPI_Win_post(3)

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