17.2.43. MPI_Comm_accept

MPI_Comm_accept - Establishes communication with a client.

17.2.43.1. Syntax

17.2.43.1.1. C Syntax

#include <mpi.h>

int MPI_Comm_accept(const char *port_name, MPI_Info info, int root, MPI_Comm comm, MPI_Comm *newcomm)

17.2.43.1.2. 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

17.2.43.1.3. 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

17.2.43.2. 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).

17.2.43.3. Output Parameters

  • newcomm : Intercommunicator with client as remote group (handle)

  • IERROR : Fortran only: Error status (integer).

17.2.43.4. 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.

17.2.43.5. Errors

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. 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