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MPI_Open_port(3)                      MPI                     MPI_Open_port(3)


NAME

       MPI_Open_port -  Establish an address that can be used to establish
       connections between groups of MPI processes


SYNOPSIS

       int MPI_Open_port(MPI_Info info, char *port_name)


INPUT PARAMETER

       info   - implementation-specific information on how to establish a port
              for MPI_Comm_accept (handle)


OUTPUT PARAMETER

       port_name
              - newly established port (string)


NOTES

       MPI copies a system-supplied port name into port_name .  port_name
       identifies the newly opened port and can be used by a client to contact
       the server.  The maximum size string that may be supplied by the system
       is MPI_MAX_PORT_NAME .


RESERVED INFO KEY VALUES

       ip_port
              - Value contains IP port number at which to establish a port.
       ip_address
              - Value contains IP address at which to establish a port.  If
              the address is not a valid IP address of the host on which the
              MPI_OPEN_PORT call is made, the results are undefined.


THREAD AND INTERRUPT SAFETY

       This routine is thread-safe.  This means that this routine may be
       safely used by multiple threads without the need for any user-provided
       thread locks.  However, the routine is not interrupt safe.  Typically,
       this is due to the use of memory allocation routines such as malloc or
       other non-MPICH runtime routines that are themselves not interrupt-
       safe.


NOTES FOR FORTRAN

       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have
       an additional argument ierr at the end of the argument list.  ierr is
       an integer and has the same meaning as the return value of the routine
       in C.  In Fortran, MPI routines are subroutines, and are invoked with
       the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in
       Fortran.


ERRORS

       All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error
       value; C routines as the value of the function and Fortran routines in
       the last argument.  Before the value is returned, the current MPI error
       handler is called.  By default, this error handler aborts the MPI job.
       The error handler may be changed with MPI_Comm_set_errhandler (for
       communicators), MPI_File_set_errhandler (for files), and
       MPI_Win_set_errhandler (for RMA windows).  The MPI-1 routine
       MPI_Errhandler_set may be used but its use is deprecated.  The
       predefined error handler MPI_ERRORS_RETURN may be used to cause error
       values to be returned.  Note that MPI does not guarentee that an MPI
       program can continue past an error; however, MPI implementations will
       attempt to continue whenever possible.

       MPI_SUCCESS
              - No error; MPI routine completed successfully.


LOCATION

       src/mpi/spawn/open_port.c

                                   9/20/2012                  MPI_Open_port(3)

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