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mpi_comm_connect(3openmpi) [osx man page]

MPI_Comm_connect(3OpenMPI)												MPI_Comm_connect(3OpenMPI)

NAME
MPI_Comm_connect - Establishes communication with a server. SYNTAX
C Syntax #include <mpi.h> int MPI_Comm_connect(char *port_name, MPI_Info info, int root, MPI_Comm comm, MPI_Comm *newcomm) Fortran Syntax INCLUDE 'mpif.h' MPI_COMM_CONNECT(PORT_NAME, INFO, ROOT, COMM, NEWCOMM, IERROR) CHARACTER*(*) PORT_NAME INTEGER INFO, ROOT, COMM, NEWCOMM, IERROR C++ Syntax #include <mpi.h> MPI::Intercomm MPI::Intracomm::Connect(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 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). OUTPUT PARAMETERS
newcomm Intercommunicator with client as remote group (handle) IERROR Fortran only: Error status (integer). DESCRIPTION
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. 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. See the MPI man page for a full list of MPI error codes. SEE ALSO
MPI_Comm_accept MPI_Open_port Open MPI 1.2 March 2007 MPI_Comm_connect(3OpenMPI)

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MPI_Comm_connect(3)							MPI						       MPI_Comm_connect(3)

NAME
MPI_Comm_connect - Make a request to form a new intercommunicator SYNOPSIS
int MPI_Comm_connect(char *port_name, MPI_Info info, int root, MPI_Comm comm, MPI_Comm *newcomm) INPUT PARAMETERS
port_name - network address (string, used only on root) info - implementation-dependent information (handle, used only on root) root - rank in comm of root node (integer) comm - intracommunicator over which call is collective (handle) OUTPUT PARAMETER
newcomm - intercommunicator with server as remote group (handle) 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. MPI_ERR_COMM - Invalid communicator. A common error is to use a null communicator in a call (not even allowed in MPI_Comm_rank ). MPI_ERR_INFO - Invalid Info MPI_ERR_PORT - LOCATION
comm_connect.c 7/27/2010 MPI_Comm_connect(3)
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