NAME

       MPI_Comm_accept  - Establishes communication with a client.

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_Comm_accept(const char *port_name, MPI_Info info, int root, MPI_Comm comm, MPI_Comm *newcomm)

Fortran Syntax

       USE MPI
       ! or the older form: INCLUDE 'mpif.h'
       MPI_COMM_ACCEPT(PORT_NAME, INFO, ROOT, COMM, NEWCOMM, IERROR)
            CHARACTER*(*)  PORT_NAME
            INTEGER        INFO, ROOT, COMM, NEWCOMM, IERROR

Fortran 2008 Syntax

       USE mpi_f08
       MPI_Comm_accept(port_name, info, root, comm, newcomm, ierror)
            CHARACTER(LEN=*), INTENT(IN) :: port_name
            TYPE(MPI_Info), INTENT(IN) :: info
            INTEGER, INTENT(IN) :: root
            TYPE(MPI_Comm), INTENT(IN) :: comm
            TYPE(MPI_Comm), INTENT(OUT) :: newcomm
            INTEGER, OPTIONAL, INTENT(OUT) :: ierror

C++ Syntax

       #include <mpi.h>
       MPI::Intercomm MPI::Intracomm::Accept(const char* port_name,
            const MPI::Info& info, int root) const

INPUT PARAMETERS

       port_name Port name (string, used only on root).

       info      Options  given  by  root  for the accept (handle, used only on root). No options
                 currently supported.

       root      Rank in comm of root node (integer).

       comm      Intracommunicator over which call is collective (handle).

OUTPUT PARAMETERS

       newcomm   Intercommunicator with client as remote group (handle)

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_Comm_accept establishes communication with a client. It is collective over the calling
       communicator.  It  returns an intercommunicator that allows communication with the client,
       after  the  client  has  connected   with   the   MPI_Comm_accept   function   using   the
       MPI_Comm_connect function.

       The port_name must have been established through a call to MPI_Open_port on the root.

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.

       See the MPI man page for a full list of MPI error codes.

SEE ALSO

       MPI_Comm_connect MPI_Open_port