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NAME

       MPI_Win_Lock -  Starts an RMA access epoch

SYNOPSIS

       #include <mpi.h>
       int MPI_Win_lock(int lock_type, int rank, int assert, MPI_Win win)

INPUT PARAMETERS

       lock_type
              - either MPI_LOCK_EXCLUSIVE or MPI_LOCK_SHARED (state)
       rank   - rank of locked window (nonnegative integer)
       assert - program assertion (integer)
       win    - window object (handle)

NOTES

       This  function is currently not implemented in LAM/MPI.  It will return
       an MPI_ERR_OTHER run time error.

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.

LOCATION

       wlock.c



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