mpi_win_fence(3) [debian man page]

MPI_Win_fence(3)							MPI							  MPI_Win_fence(3)

NAME

       MPI_Win_fence -	Perform an MPI fence synchronization on a MPI window

SYNOPSIS

       int MPI_Win_fence(int assert, MPI_Win win)

INPUT PARAMETERS

       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_fence oper-
       ation.  The value zero is always correct.  Other assertion values may be or'ed together.  Assertions that are valid for MPI_Win_fence are:

       MPI_MODE_NOSTORE
	      - the local window was not updated by local stores (or local get or receive calls) since last synchronization.
       MPI_MODE_NOPUT
	      - the local window will not be updated by put or accumulate calls after the fence call, until the ensuing (fence) synchronization.
       MPI_MODE_NOPRECEDE
	      - the fence does not complete any sequence of locally issued RMA calls. If this assertion is given by  any  process  in  the  window
	      group, then it must be given by all processes in the group.
       MPI_MODE_NOSUCCEED
	      -  the  fence does not start any sequence of locally issued RMA calls. If the assertion is given by any process in the window group,
	      then it must be given by all processes in the group.

THREAD AND INTERRUPT SAFETY

       This routine is thread-safe.  This means that this routine may be safely used by multiple threads without the need  for	any  user-provided
       thread  locks.  However, the routine is not interrupt safe.  Typically, this is due to the use of memory allocation routines such as malloc
       or other non-MPICH runtime routines that are themselves not interrupt-safe.

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.
       MPI_ERR_OTHER
	      - Other error; use MPI_Error_string to get more information about this error code.
       MPI_ERR_WIN
	      - Invalid MPI window object

LOCATION

       win_fence.c

								     5/20/2010							  MPI_Win_fence(3)