NAME

       MPI_Errhandler_get -  Gets the error handler for a communicator

SYNOPSIS

       int MPI_Errhandler_get(MPI_Comm comm, MPI_Errhandler *errhandler)

INPUT PARAMETERS

       comm   - communicator to get the error handler from (handle)

OUTPUT PARAMETERS

       errhandler
              - MPI error handler currently associated with communicator (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.

NOTE ON IMPLEMENTATION

       The  MPI  Standard was unclear on whether this routine required the user to call MPI_Errhandler_free once
       for each call made to this routine in order to free the error handler.  After some debate, the MPI  Forum
       added  an  explicit  statement  that users are required to call MPI_Errhandler_free when the return value
       from this routine is no longer needed.  This behavior is similar to the other MPI  routines  for  getting
       objects;  for  example, MPI_Comm_group requires that the user call MPI_Group_free when the group returned
       by MPI_Comm_group is no longer needed.

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_ARG
              - Invalid argument.  Some argument is invalid and is not identified  by  a  specific  error  class
              (e.g., MPI_ERR_RANK ).

                                                   11/12/2016                              MPI_Errhandler_get(3)