SYNTAX

   C Syntax
          #include <mpi.h>

          int MPI_Status_set_elements(MPI_Status *status, MPI_Datatype datatype, int count)
          int MPI_Status_set_elements_x(MPI_Status *status, MPI_Datatype datatype, MPI_Count count)

   Fortran Syntax
          USE MPI
          ! or the older form: INCLUDE 'mpif.h'
          MPI_STATUS_SET_ELEMENTS(STATUS, DATATYPE, COUNT, IERROR)
               INTEGER STATUS(MPI_STATUS_SIZE), DATATYPE, COUNT, IERROR
          MPI_STATUS_SET_ELEMENTS_X(STATUS, DATATYPE, COUNT, IERROR)
               INTEGER STATUS(MPI_STATUS_SIZE), DATATYPE
                  INTEGER(KIND=MPI_COUNT_KIND) COUNT
                  INTEGER IERROR

   Fortran 2008 Syntax
          USE mpi_f08
          MPI_Status_set_elements(status, datatype, count, ierror)
               TYPE(MPI_Status), INTENT(INOUT) :: status
               TYPE(MPI_Datatype), INTENT(IN) :: datatype
               INTEGER, INTENT(IN) :: count
               INTEGER, OPTIONAL, INTENT(OUT) :: ierror
          MPI_Status_set_elements_x(status, datatype, count, ierror)
               TYPE(MPI_Status), INTENT(INOUT) :: status
               TYPE(MPI_Datatype), INTENT(IN) :: datatype
               INTEGER(KIND = MPI_COUNT_KIND), INTENT(IN) :: count
               INTEGER, OPTIONAL, INTENT(OUT) :: ierror

INPUT/OUTPUT PARAMETER

       • status: Status to associate with count (status).

INPUT PARAMETERS

       • datatype: Data type associated with count (handle).

       • count: Number of elements to associate with status (integer).

OUTPUT PARAMETER

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

DESCRIPTION

       MPI_Status_set_elements modifies the opaque part of status so that a call to  :ref:`MPI_Get_elements`  or
       :ref:`MPI_Get_elements_x` will return count.  :ref:`MPI_Get_count` will return a compatible value.

       A  subsequent  call  to  MPI_Get_count(status,  datatype,  count),  to MPI_Get_elements(status, datatype,
       count), or to MPI_Get_elements_x(status, datatype, count) must use a data-type argument that has the same
       type signature as the data-type argument that was used in the call to MPI_Status_set_elements.*

NOTES

       Users are advised not to reuse the status fields  for  values  other  than  those  for  which  they  were
       intended.  Doing  so  may  lead  to unexpected results when using the status object. For example, calling
       MPI_Get_elements may cause an error if the value is out of range, or it may be impossible to detect  such
       an  error. The extra_state argument provided with a generalized request can be used to return information
       that does not logically belong in status. Furthermore, modifying the values in a status set internally by
       MPI, such as :ref:`MPI_Recv`, may lead to unpredictable results and is strongly discouraged.

ERRORS

       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 MPI man page for a full list of MPI error codes.

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

COPYRIGHT

       2003-2025, The Open MPI Community

                                                  Feb 17, 2025                      MPI_STATUS_SET_ELEMENTS_X(3)