osx man page for mpi_type_free

MPI_Type_free(3OpenMPI) 												   MPI_Type_free(3OpenMPI)

NAME
       MPI_Type_free - Frees a data type.

SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Type_free(MPI_Ddatatype *datatype)

Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_TYPE_FREE(DATATYPE, IERROR)
	    INTEGER   DATATYPE, IERROR

C++ Syntax
       #include <mpi.h>
       void Datatype::Free()

INPUT
/OUTPUT PARAMETER
       datatype  Datatype that is freed (handle).

OUTPUT PARAMETER
       IERROR	 Fortran only: Error status (integer).

DESCRIPTION
       Marks the datatype object associated with datatype for de-allocation and sets datatype to MPI_DATATYPE_NULL. Any communication that is cur-
       rently using this datatype will complete normally. Derived datatypes that were defined from the freed datatype are not affected.

       Freeing a datatype does not affect any other datatype that was built from the freed datatype. The system behaves as if input datatype argu-
       ments to derived datatype constructors are passed by value.

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++ func-
       tions 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_Type_free(3OpenMPI)