SYNTAX
------

C Syntax
^^^^^^^^

.. code-block:: c

    int MPI_Barrier(MPI_Comm comm)

    int MPI_Ibarrier(MPI_Comm comm, MPI_Request* request)

    int MPI_Barrier_init(MPI_Comm comm, MPI_Info info, MPI_Request*
        request)

Fortran Syntax
^^^^^^^^^^^^^^

.. code-block:: fortran

    USE MPI
    ! or the older form: INCLUDE 'mpif.h'
    MPI_BARRIER(COMM, IERROR)
    	INTEGER COMM, IERROR

    MPI_IBARRIER(COMM, REQUEST, IERROR)
    	INTEGER COMM, REQUEST, IERROR

    MPI_BARRIER_INIT(COMM, INFO, REQUEST, IERROR)
    	INTEGER COMM, INFO, REQUEST, IERROR

Fortran 2008 Syntax
^^^^^^^^^^^^^^^^^^^

.. code-block:: fortran

    USE mpi_f08
    MPI_Barrier(comm, ierror)
    	TYPE(MPI_Comm), INTENT(IN) :: comm
    	INTEGER, OPTIONAL, INTENT(OUT) :: ierror

    MPI_Ibarrier(comm, request, ierror)
    	TYPE(MPI_Comm), INTENT(IN) :: comm
    	TYPE(MPI_Request), INTENT(OUT) :: request
    	INTEGER, OPTIONAL, INTENT(OUT) :: ierror

    MPI_Barrier_init(comm, info, request, ierror)
    	TYPE(MPI_Comm), INTENT(IN) :: comm
    	TYPE(MPI_Info), INTENT(IN) :: info
    	TYPE(MPI_Request), INTENT(OUT) :: request
    	INTEGER, OPTIONAL, INTENT(OUT) :: ierror
