NAME

       MPI_Win_create_dynamic  -   Create  an MPI Window object for one-sided communication.  This window allows
       memory to be dynamically exposed and un-exposed for RMA operations.

SYNOPSIS

       int MPI_Win_create_dynamic(MPI_Info info, MPI_Comm comm, MPI_Win * win)

       This is a collective call executed by all processes in the group of comm. It returns a window win without
       memory attached. Existing process memory can be attached as  described  below.  This  routine  returns  a
       window  object  that can be used by these processes to perform RMA operations on attached memory. Because
       this window has special properties, it will sometimes be referred to  as  a  dynamic  window.   The  info
       argument can be used to specify hints similar to the info argument for MPI_Win_create .

       In  the  case  of a window created with MPI_Win_create_dynamic , the target_disp for all RMA functions is
       the address at the target; i.e., the effective window_base is MPI_BOTTOM and the disp_unit  is  one.  For
       dynamic  windows,  the  target_disp  argument  to  RMA communication operations is not restricted to non-
       negative values. Users should use MPI_Get_address at the target process to determine  the  address  of  a
       target memory location and communicate this address to the origin process.

INPUT PARAMETERS

       info   - info argument (handle)
       comm   - communicator (handle)

OUTPUT PARAMETERS

       win    - window object returned by the call (handle)

NOTES

       Users are cautioned that displacement arithmetic can overflow in variables of type MPI_Aint and result in
       unexpected values on some platforms. This issue may be addressed in a future version of MPI.

       Memory  in  this  window  may  not be used as the target of one-sided accesses in this window until it is
       attached using the function MPI_Win_attach .  That is, in addition  to  using  MPI_Win_create_dynamic  to
       create  an  MPI  window, the user must use MPI_Win_attach before any local memory may be the target of an
       MPI RMA operation. Only memory that is currently accessible may be attached.

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_ARG
              -  Invalid  argument.   Some  argument  is invalid and is not identified by a specific error class
              (e.g., MPI_ERR_RANK ).
       MPI_ERR_COMM
              - Invalid communicator.  A common error is to use a null communicator in a call (not even  allowed
              in MPI_Comm_rank ).
       MPI_ERR_INFO
              - Invalid Info
       MPI_ERR_OTHER
              - Other error; use MPI_Error_string to get more information about this error code.
       MPI_ERR_SIZE
              -

SEE ALSO

       MPI_Win_attach MPI_Win_detach MPI_Win_allocate MPI_Win_allocate_shared MPI_Win_create MPI_Win_free

                                                   11/12/2019                          MPI_Win_create_dynamic(3)