This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles.

For more information about the manual page format, see the manual page for manpages(5).

MPI_Status_set_elements(3OpenMPI)                                          MPI_Status_set_elements(3OpenMPI)



NAME
       MPI_Status_set_elements - Modifies opaque part of status to allow MPI_Get_elements to return count.


SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Status_set_elements(MPI_Status *status, MPI_Datatype datatype, int count)


Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_STATUS_SET_ELEMENTS(STATUS, DATATYPE, COUNT, IERROR)
            INTEGER   STATUS(MPI_STATUS_SIZE), DATATYPE, COUNT, IERROR


C++ Syntax
       #include <mpi.h>
       void MPI::Status::Set_elements(const MPI::Datatype& datatype, int count)


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 MPI_Get_elements will
       return count. MPI_Get_count will return a compatible value.

       A subsequent call to MPI_Get_count(status, datatype, count) or to MPI_Get_elements(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 MPI_Recv, may lead to unpredictable results and is strongly discour-aged. discouraged.
       aged.


ERRORS
       Almost all MPI routines return an error value; C routines as the value of the  function  and  Fortran
       routines  in  the  last argument. C++ functions do not return errors. If the default error handler is
       set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to  throw
       an MPI:Exception object.

       Before  the  error value is returned, the current MPI error handler is called. By default, this error
       handler aborts the MPI job, except for I/O function errors. The error handler  may  be  changed  with
       MPI_Comm_set_errhandler;  the  predefined  error handler MPI_ERRORS_RETURN may be used to cause error
       values to be returned. Note that MPI does not guarantee that an MPI  program  can  continue  past  an
       error.




Open MPI 1.2                                   September 2006              MPI_Status_set_elements(3OpenMPI)