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NAME
       MPI_Win_wait -  Completes an RMA exposure epoch


SYNOPSIS
       #include <mpi.h>
       int MPI_Win_wait(MPI_Win win)


INPUT PARAMETER
       win    - window object (handle)


NOTES
       Completes  an  RMA  exposure  epoch  started  by  a call to MPI_WIN_POST on win. This call
       matches calls to MPI_WIN_COMPLETE(win) issued by each of the origin  processes  that  were
       granted  access to the window during this epoch. The call to MPI_WIN_WAIT will block until
       all matching calls to MPI_WIN_COMPLETE have  occurred.  This  guarantees  that  all  these
       origin  processes  have  completed  their  RMA accesses to the local window. When the call
       returns, all these RMA accesses will have completed at the target window.


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.


USAGE WITH IMPI EXTENSIONS
       The  IMPI  standard  only supports MPI-1 functions.  Hence, this function is currently not
       designed to operate within an IMPI job.


ERRORS
       If an error occurs in an MPI function, the current MPI error handler is called  to  handle
       it.   By default, this error handler aborts the MPI job.  The error handler may be changed
       with MPI_Errhandler_set ; the predefined error handler MPI_ERRORS_RETURN may  be  used  to
       cause  error values to be returned (in C and Fortran; this error handler is less useful in
       with the C++ MPI bindings.   The  predefined  error  handler  MPI::ERRORS_THROW_EXCEPTIONS
       should  be  used in C++ if the error value needs to be recovered).  Note that MPI does not
       guarantee that an MPI program can continue past an error.

       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.  The C++ bindings for
       MPI do not return error  values;  instead,  error  values  are  communicated  by  throwing
       exceptions of type MPI::Exception (but not by default).  Exceptions are only thrown if the
       error value is not MPI::SUCCESS .

       Note that if the MPI::ERRORS_RETURN handler is set in C++, while MPI functions will return
       upon an error, there will be no way to recover what the actual error value was.
       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_WIN
              - Invalid window.  A common error is to use a null window in a call.
       MPI_ERR_EPOCH
              -  This  error indicates than an operation has been attempted on a "closed" window.
              Certain one-sided operations can only be performed on windows whose epoch has  been
              started with MPI_Win_start.


SEE ALSO
       MPI_Put(3),    MPI_Get(3),   MPI_Win_create(3),   MPI_Win_start(3),   MPI_Win_complete(3),
       MPI_Win_fence(3),     MPI_Win_free(3),     MPI_Win_get_group(3),     MPI_Win_get_group(3),
       MPI_Accumulate(3)


MORE INFORMATION
       For  more information, please see the official MPI Forum web site, which contains the text
       of both the MPI-1 and MPI-2 standards.  These documents contain detailed information about
       each MPI function (most of which is not duplicated in these man pages).

       http://www.mpi-forum.org/


LOCATION
       wwait.c