osx man page for mpi_type_commit

MPI_Type_commit(3OpenMPI)												 MPI_Type_commit(3OpenMPI)

NAME
       MPI_Type_commit - Commits a data type.

SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Type_commit(MPI_Datatype *datatype)

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

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

INPUT PARAMETER
       datatype  Data type (handle).

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

DESCRIPTION
       The  commit  operation commits the data type. A data type is the formal description of a communication buffer, not the content of that buf-
       fer. After a data type has been committed, it can be repeatedly reused to communicate the changing content of a buffer or, indeed, the con-
       tent of different buffers, with different starting addresses.

       Example: The following Fortran code fragment gives examples of using MPI_Type_commit.

	   INTEGER type1, type2
	   CALL MPI_TYPE_CONTIGUOUS(5, MPI_REAL, type1, ierr)
			 ! new type object created
	   CALL MPI_TYPE_COMMIT(type1, ierr)
			 ! now type1 can be used for communication

       If the data type specified in datatype is already committed, it is equivalent to a no-op.

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_commit(3OpenMPI)