MPI_Status_set_elements(3)         Open MPI         MPI_Status_set_elements(3)



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 discouraged.


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.




1.4.1                            Jan 14, 2010       MPI_Status_set_elements(3)
