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MPI_Comm_connect - Establishes communication with a server.
#include <mpi.h>
int MPI_Comm_connect(const char *port_name, MPI_Info info, int root,
MPI_Comm comm, MPI_Comm *newcomm)
USE MPI
! or the older form: INCLUDE ’mpif.h’
MPI_COMM_CONNECT(PORT_NAME, INFO, ROOT, COMM, NEWCOMM, IERROR)
CHARACTER*(*) PORT_NAME
INTEGER INFO, ROOT, COMM, NEWCOMM, IERROR
USE mpi_f08
MPI_Comm_connect(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
- port_name
- Port name (string, used only on root).
- info
- Options
given by root for the connect (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).
- newcomm
- Intercommunicator
with client as remote group (handle)
- IERROR
- Fortran only: Error status
(integer).
MPI_Comm_connect establishes communication with a
server specified by port_name. It is collective over the calling communicator
and returns an intercommunicator in which the remote group participated
in an MPI_Comm_accept. The MPI_Comm_connect call must only be called after
the MPI_Comm_accept call has been made by the MPI job acting as the server.
If the named port does not exist (or has been closed), MPI_Comm_connect
raises an error of class MPI_ERR_PORT.
MPI provides no guarantee of fairness
in servicing connection attempts. That is, connection attempts are not necessarily
satisfied in the order in which they were initiated, and competition from
other connection attempts may prevent a particular connection attempt from
being satisfied.
The port_name parameter is the address of the server. It
must be the same as the name returned by MPI_Open_port on the server.
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. Note that MPI does not guarantee that an MPI program
can continue past an error.
See the MPI man page for a full list of MPI
error codes.
MPI_Comm_accept MPI_Open_port
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