MPITypeextent(3OpenMPI) MPITypeextent(3OpenMPI)

NAME
       MMPPIITTyyppeeeexxtteenntt  -  Returns  the  extent of a data type, the difference
       between the upper and lower bounds of the data type - use of this rou-
       tine is deprecated.


SSYYNNTTAAXX
CC SSyynnttaaxx
       #include 
       int MPITypeextent(MPIDatatype datatype, MPIAint *extent)


FFoorrttrraann SSyynnttaaxx
       INCLUDE 'mpif.h'
       MPITYPEEXTENT(DATATYPE, EXTENT, IERROR)
            INTEGER   DATATYPE, EXTENT, IERROR



IINNPPUUTT PPAARRAAMMEETTEERR
       datatype  Datatype (handle).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       extent    Datatype extent (integer).


       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       Note  that  use  of  this routine is deprecated as of MPI-2. Please use
       MPITypegetextent instead.

       This deprecated routine is not available in C++.

       MPITypeextent returns the extent  of  a  data  type,  the  difference
       between the upper and lower bounds of the data type.

       In general, if

           Typemap = {(type(0), disp(0)), ..., (type(n-1), disp(n-1))}

       then the lower bound of Typemap is defined to be

                     ( min(j) disp(j)                         if no entry has
         lb(Typemap)=(                                        basic type lb
                     (min(j) {disp(j) such that type(j) = lb} otherwise


       Similarly, the upper bound of Typemap is defined to be

                     (max(j) disp(j) + sizeof(type(j)) + e    if no entry has
         ub(Typemap)=(                                        basic type ub
                     (max(j) {disp(j) such that type(j) = ub} otherwise

       Then

           extent(Typemap) = ub(Typemap) - lb(Typemap)

       If  type(i)  requires alignment to a byte address that is a multiple of
       k(i), then e  is  the  least  nonnegative  increment  needed  to  round
       extent(Typemap) to the next multiple of max(i) k(i).


EERRRROORRSS
       Almost  all MPI routines return an error value; C routines as the value
       of the function and Fortran routines in the last  argument.  C++  func-
       tions  do  not  return  errors.  If the default error handler is set to
       MPI::ERRORSTHROWEXCEPTIONS, 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
       MPICommseterrhandler; the predefined error handler MPIERRORSRETURN
       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.


SEE ALSO
       MPITypegetextent




Open MPI 1.2                    September 2006       MPITypeextent(3OpenMPI)