C Syntax

       2003-2025, The Open MPI Community

                                                  Jun 07, 2025                        MPI_TYPE_CREATE_RESIZED(3)

MPI_Type_create_resized  returns  in  newtype  a  handle to a new data type that is identical to oldtype,
       except that the lower bound of this new data type is set to be lb, and its upper bound is set to be lb  +
       extent.  Any previous lb and ub markers are erased, and a new pair of lower bound and upper bound markers
       are put in the positions indicated by the lb and extent arguments. This affects the behavior of the  data
       type  when  used  in  communication  operations, with count > 1, and when used in the construction of new
       derived data types.

       Almost  all  MPI  routines  return  an  error  value; C routines as the return result of the function and
       Fortran routines in the last argument.

       Before the error value is returned, the current MPI  error  handler  associated  with  the  communication
       object  (e.g.,  communicator, window, file) is called.  If no communication object is associated with the
       MPI call, then the call is considered attached to MPI_COMM_SELF and will call the  associated  MPI  error
       handler.   When   MPI_COMM_SELF   is   not  initialized  (i.e.,  before  MPI_Init/MPI_Init_thread,  after
       MPI_Finalize, or when using the Sessions Model exclusively) the error raises the initial  error  handler.
       The  initial  error handler can be changed by calling MPI_Comm_set_errhandler on MPI_COMM_SELF when using
       the World model, or the mpi_initial_errhandler CLI argument to mpiexec or info  key  to  MPI_Comm_spawn/‐
       MPI_Comm_spawn_multiple.   If no other appropriate error handler has been set, then the MPI_ERRORS_RETURN
       error handler is called for MPI I/O functions and the MPI_ERRORS_ABORT error handler is  called  for  all
       other MPI functions.

       Open MPI includes three predefined error handlers that can be used:

       • MPI_ERRORS_ARE_FATAL Causes the program to abort all connected MPI processes.

       • MPI_ERRORS_ABORT An error handler that can be invoked on a communicator, window, file, or session. When
         called  on  a  communicator,  it  acts  as if MPI_Abort was called on that communicator. If called on a
         window or file, acts as if MPI_Abort was called on a communicator containing the group of processes  in
         the corresponding window or file. If called on a session, aborts only the local process.

       • MPI_ERRORS_RETURN Returns an error code to the application.

       MPI applications can also implement their own error handlers by calling:

       • MPI_Comm_create_errhandler then MPI_Comm_set_errhandler

       • MPI_File_create_errhandler then MPI_File_set_errhandler

       • MPI_Session_create_errhandler then MPI_Session_set_errhandler or at MPI_Session_init

       • MPI_Win_create_errhandler then MPI_Win_set_errhandler

       Note that MPI does not guarantee that an MPI program can continue past an error.

       See the MPImanpage for a full list of MPIerrorcodes.

       See the Error Handling section of the MPI-3.1 standard for more information.

       SEEALSO:

          • MPI_Type_get_extent

       • oldtype: Input data type (handle).

       • lb: New lower bound of data type (integer).

       • extent: New extent of data type (integer).

       Use of MPI_Type_create_resized is strongly recommended over the legacy  MPI-1  functions  MPI_Type_extent
       and MPI_Type_lb.

       • newtype: Output data type (handle).

       • ierror: Fortran only: Error status (integer).

CSyntax
          #include <mpi.h>

          int MPI_Type_create_resized(MPI_Datatype oldtype, MPI_Aint lb,
               MPI_Aint extent, MPI_Datatype *newtype)

   FortranSyntax
          USE MPI
          ! or the older form: INCLUDE 'mpif.h'
          MPI_TYPE_CREATE_RESIZED(OLDTYPE, LB, EXTENT, NEWTYPE, IERROR)
               INTEGER OLDTYPE, NEWTYPE, IERROR
               INTEGER(KIND=MPI_ADDRESS_KIND)  LB, EXTENT

   Fortran2008Syntax
          USE mpi_f08
          MPI_Type_create_resized(oldtype, lb, extent, newtype, ierror)
               INTEGER(KIND=MPI_ADDRESS_KIND), INTENT(IN) :: lb, extent
               TYPE(MPI_Datatype), INTENT(IN) :: oldtype
               TYPE(MPI_Datatype), INTENT(OUT) :: newtype
               INTEGER, OPTIONAL, INTENT(OUT) :: ierror