| MPI_COMM_CREATE_ERRHANDLER(comm_errhandler_fn, errhandler) | |
| IN comm_errhandler_fn | user defined error handling procedure (function) |
| OUT errhandler | MPI error handler (handle) |
Creates an error handler that can be attached to communicators.
The user routine should be, in C, a function of type MPI_Comm_errhandler_function, which is defined as
typedef void MPI_Comm_errhandler_function(MPI_Comm *comm, int *error_code, ...);
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. If the routine would have returned MPI_ERR_IN_STATUS, it is the error code returned in the status for the request that caused the error handler to be invoked. The remaining arguments are ``varargs'' arguments whose number and meaning is implementationdependent. An implementation should clearly document these arguments. Addresses are used so that the handler may be written in Fortran.
With the Fortran mpi_f08 module, the user routine comm_errhandler_fn should be of the form:
ABSTRACT INTERFACE
SUBROUTINE MPI_Comm_errhandler_function(comm, error_code)
TYPE(MPI_Comm) :: comm
INTEGER :: error_code
With the Fortran mpi module and (deprecated) mpif.h include file, the user routine COMM_ERRHANDLER_FN should be of the form:
SUBROUTINE COMM_ERRHANDLER_FUNCTION(COMM, ERROR_CODE)
INTEGER COMM, ERROR_CODE
Rationale.
The variable argument list is provided because it provides an
ISO-standard
hook for providing additional information to the error
handler; without this hook,
ISO C
prohibits additional arguments.
( End of rationale.)
Advice to users.
A newly
created communicator inherits the error
handler that is associated with the ``parent'' communicator.
In particular, the user can specify a ``global'' error handler for
all communicators by
associating this handler with the communicator MPI_COMM_WORLD
immediately after initialization.
( End of advice to users.)
| MPI_COMM_SET_ERRHANDLER(comm, errhandler) | |
| INOUT comm | communicator (handle) |
| IN errhandler | new error handler for communicator (handle) |
Attaches a new error handler to a communicator. The error handler must be either a predefined error handler, or an error handler created by a call to MPI_COMM_CREATE_ERRHANDLER.
| MPI_COMM_GET_ERRHANDLER(comm, errhandler) | |
| IN comm | communicator (handle) |
| OUT errhandler | error handler currently associated with communicator (handle) |
Retrieves the error handler currently associated with a communicator. For example, a library function may register at its entry point the current error handler for a communicator, set its own private error handler for this communicator, and restore before exiting the previous error handler.