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/* Asynchronous timers.
Copyright (C) 2000 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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.
GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef EMACS_ATIMER_H
#define EMACS_ATIMER_H
#include "systime.h" /* for EMACS_TIME */
/* Forward declaration. */
struct atimer;
/* Types of timers. */
enum atimer_type
{
/* Timer is ripe at some absolute time. */
ATIMER_ABSOLUTE,
/* Timer is ripe at now plus an offset. */
ATIMER_RELATIVE,
/* Timer runs continously. */
ATIMER_CONTINUOUS
};
/* Type of timer callback functions. */
typedef void (* atimer_callback) P_ ((struct atimer *timer));
/* Structure describing an asynchronous timer. */
struct atimer
{
/* The type of this timer. */
enum atimer_type type;
/* Time when this timer is ripe. */
EMACS_TIME expiration;
/* Interval of this timer. */
EMACS_TIME interval;
/* Function to call when timer is ripe. Interupt input is
garanteed to not be blocked when this function is called. */
atimer_callback fn;
/* Additional user-specified data to pass to FN. */
void *client_data;
/* Next in list of active or free atimers. */
struct atimer *next;
};
/* Function prototypes. */
struct atimer *start_atimer P_ ((enum atimer_type, EMACS_TIME,
atimer_callback, void *));
void cancel_atimer P_ ((struct atimer *));
void do_pending_atimers P_ ((void));
void init_atimer P_ ((void));
void turn_on_atimers P_ ((int));
void stop_other_atimers P_ ((struct atimer *));
void run_all_atimers P_ ((void));
Lisp_Object unwind_stop_other_atimers P_ ((Lisp_Object));
#endif /* EMACS_ATIMER_H */
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