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openmpi/ompi/mpi/man/man3/MPI_Comm_create_errhandler.3in

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.\"Copyright 2009-2010 Cisco Systems, Inc. All rights reserved.
.\"Copyright 2006-2008 Sun Microsystems, Inc.
.\" Copyright (c) 1996 Thinking Machines Corporation
.TH MPI_Comm_create_errhandler 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
.SH NAME
\fBMPI_Comm_create_errhandler \fP \- Creates an error handler that can be attached to communicators.
.SH SYNTAX
.ft R
.SH C Syntax
.nf
#include <mpi.h>
int MPI_Comm_create_errhandler(MPI_Comm_errhandler_function \fI*function\fP,
MPI_Errhandler *\fIerrhandler\fP)
.SH Fortran Syntax
.nf
INCLUDE 'mpif.h'
MPI_COMM_CREATE_ERRHANDLER(\fIFUNCTION, ERRHANDLER, IERROR\fP)
EXTERNAL \fIFUNCTION\fP
INTEGER \fIERRHANDLER, IERROR\fP
.SH C++ Syntax
.nf
#include <mpi.h>
static MPI::Errhandler
MPI::Comm::Create_errhandler(MPI::Comm::Errhandler_function*
\fIfunction\fP)
.SH DEPRECATED TYPE NAME NOTE
.ft R
MPI-2.2 deprecated the MPI_Comm_errhandler_fn and
MPI::Comm::Errhandler_fn types in favor of
MPI_Comm_errhandler_function and MPI::Comm::Errhandler_function,
respectively. Open MPI supports both names (indeed, the _fn names are
typedefs to the _function names).
.SH INPUT PARAMETER
.ft R
.TP 1i
function
User-defined error handling procedure (function).
.SH OUTPUT PARAMETERS
.ft R
.TP 1i
errhandler
MPI error handler (handle).
.ft R
.TP 1i
IERROR
Fortran only: Error status (integer).
.SH DESCRIPTION
.ft R
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.
.sp
In C, the user routine should be a function of type MPI_Comm_errhandler_function, which is defined as
.sp
.nf
typedef void MPI_Comm_errhandler_function(MPI_Comm *, int *, \&...);
.fi
.sp
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.
.sp
In Fortran, the user routine should be of this form:
.sp
.nf
SUBROUTINE COMM_ERRHANDLER_FUNCTION(COMM, ERROR_CODE, \&...)
INTEGER COMM, ERROR_CODE
.fi
.sp
In C++, the user routine should be of this form:
.sp
.nf
typedef void MPI::Comm::Errhandler_function(MPI_Comm &, int *, \&...);
.fi
.SH 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.
.sp
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.