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/* bell.h - The interface to and for a bell driver.
Copyright (C) 2002 Free Software Foundation, Inc.
Written by Marcus Brinkmann.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#ifndef _BELL_H_
#define _BELL_H_ 1
#include <errno.h>
/* The bell drivers are set up by the driver's initialization routine
and added to the console client with driver_add_bell. All
subsequent operations on the display are fully synchronized by the
caller. The driver deinitialization routine should call
driver_remove_bell. */
/* Forward declaration. */
struct bell_ops;
typedef struct bell_ops *bell_ops_t;
/* Add the bell HANDLE with the operations OPS to the console client.
As soon as this is called, operations on this bell may be
performed, even before the function returns. */
error_t driver_add_bell (bell_ops_t ops, void *handle);
/* Remove the bell HANDLE with the operations OPS from the console
client. As soon as this function returns, no operations will be
performed on the bell anymore. */
error_t driver_remove_bell (bell_ops_t ops, void *handle);
struct bell_ops
{
/* Beep! the bell HANDLE. */
error_t (*beep) (void *handle);
/* Do not use, do not remove. */
void (*deprecated) (void *handle, unsigned int key);
};
#endif /* _BELL_H_ */
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