MPIIntercommmerge(3OpenMPI) MPIIntercommmerge(3OpenMPI)

NAME
       MMPPIIIInntteerrccoommmmmmeerrggee  - Creates an intracommunicator from an intercommu-
       nicator.


SSYYNNTTAAXX
CC SSyynnttaaxx
       #include 
       int MPIIntercommmerge(MPIComm intercomm, int high,
            MPIComm *newintracomm


FFoorrttrraann SSyynnttaaxx
       INCLUDE 'mpif.h'
       MPIINTERCOMMMERGE(INTERCOMM, HIGH, NEWINTRACOMM, IERROR)
            INTEGER   INTERCOMM, NEWINTRACOMM, IERROR
            LOGICAL   HIGH


CC++++ SSyynnttaaxx
       #include 
       Intracomm Intercomm::Merge(bool high) const


IINNPPUUTT PPAARRAAMMEETTEERRSS
       intercomm Intercommunicator (type indicator).

       high      Used to order the groups of the two intracommunicators within
                 comm when creating the new communicator (type indicator).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       newintracomm
                 Created intracommunicator (type indicator).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       This  function  creates  an intracommunicator from the union of the two
       groups that are associated with intercomm. All processes should provide
       the  same high value within each of the two groups. If processes in one
       group provide the value high = false and processes in the  other  group
       provide  the  value  high = true, then the union orders the "low" group
       before the "high" group. If all processes provide the same  high  argu-
       ment,  then  the order of the union is arbitrary. This call is blocking
       and collective within the union of the two groups.


EERRRROORRSS
       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::ERRORSTHROWEXCEPTIONS, 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
       MPICommseterrhandler; the predefined error handler MPIERRORSRETURN
       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 ALSO
       MPIIntercommcreate
       MPICommfree







Open MPI 1.2                    September 2006   MPIIntercommmerge(3OpenMPI)