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MPI_Comm_create_errhandler

NAME

MPI_Comm_create_errhandler - Creates an error handler that can be attached to communicators.

SYNTAX

C Syntax

 #include <mpi.h>
 int MPI_Comm_create_errhandler(MPI_Comm_errhandler_fn *function,
         MPI_Errhandler *errhandler)
 
 

 

Fortran Syntax

 INCLUDE 'mpif.h'
 MPI_COMM_CREATE_ERRHANDLER(FUNCTION, ERRHANDLER, IERROR)
         EXTERNAL        FUNCTION
         INTEGER ERRHANDLER, IERROR
 
 

 

C++ Syntax

 #include <mpi.h>
 static MPI::Errhandler
         MPI::Comm::Create_errhandler(MPI::Comm::Errhandler_fn*
         function)
 
 

 

INPUT PARAMETER

function

User-defined error handling procedure (function).

OUTPUT PARAMETERS

errhandler

MPI error handler (handle).

IERROR

Fortran only: Error status (integer).

DESCRIPTION

MPI_Comm_create_errhandler creates an error handler that can be attached to communicators. This function is identical to MPI_Errhandler_create, the use of which is deprecated.

In C, the user routine should be a function of type MPI_Comm_errhandler_fn, which is defined as

     typedef void MPI_Comm_errhandler_fn(MPI_Comm *, int *, ...); 
 

The first argument is the communicator in use. The second is the error code to be returned by the MPI routine that raised the error. This typedef replaces MPI_Handler_function, the use of which is deprecated.

In Fortran, the user routine should be of this form:

     SUBROUTINE COMM_ERRHANDLER_FN(COMM, ERROR_CODE, ...)
         INTEGER COMM, ERROR_CODE
 

In C++, the user routine should be of this form:

     typedef void MPI::Comm::Errhandler_fn(MPI_Comm &, int *, ...); 
 

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++ 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.