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      1  1.10   tsutsui /*	$NetBSD: event_var.h,v 1.10 2014/03/21 16:58:54 tsutsui Exp $ */
      2   1.1       oki 
      3   1.1       oki /*
      4   1.1       oki  * Copyright (c) 1992, 1993
      5   1.1       oki  *	The Regents of the University of California.  All rights reserved.
      6   1.1       oki  *
      7   1.1       oki  * This software was developed by the Computer Systems Engineering group
      8   1.1       oki  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9   1.1       oki  * contributed to Berkeley.
     10   1.1       oki  *
     11   1.1       oki  * All advertising materials mentioning features or use of this software
     12   1.1       oki  * must display the following acknowledgement:
     13   1.1       oki  *	This product includes software developed by the University of
     14   1.1       oki  *	California, Lawrence Berkeley Laboratory.
     15   1.1       oki  *
     16   1.1       oki  * Redistribution and use in source and binary forms, with or without
     17   1.1       oki  * modification, are permitted provided that the following conditions
     18   1.1       oki  * are met:
     19   1.1       oki  * 1. Redistributions of source code must retain the above copyright
     20   1.1       oki  *    notice, this list of conditions and the following disclaimer.
     21   1.1       oki  * 2. Redistributions in binary form must reproduce the above copyright
     22   1.1       oki  *    notice, this list of conditions and the following disclaimer in the
     23   1.1       oki  *    documentation and/or other materials provided with the distribution.
     24   1.4       agc  * 3. Neither the name of the University nor the names of its contributors
     25   1.1       oki  *    may be used to endorse or promote products derived from this software
     26   1.1       oki  *    without specific prior written permission.
     27   1.1       oki  *
     28   1.1       oki  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29   1.1       oki  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30   1.1       oki  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31   1.1       oki  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32   1.1       oki  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33   1.1       oki  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34   1.1       oki  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35   1.1       oki  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36   1.1       oki  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37   1.1       oki  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38   1.1       oki  * SUCH DAMAGE.
     39   1.1       oki  *
     40   1.1       oki  *	@(#)event_var.h	8.1 (Berkeley) 6/11/93
     41   1.1       oki  */
     42   1.1       oki 
     43   1.1       oki /*
     44   1.1       oki  * Internal `Firm_event' interface for the keyboard and mouse drivers.
     45   1.1       oki  * The drivers are expected not to place events in the queue above spltty(),
     46   1.1       oki  * i.e., are expected to run off serial ports.
     47   1.1       oki  */
     48   1.1       oki 
     49   1.1       oki /* EV_QSIZE should be a power of two so that `%' is fast */
     50   1.1       oki #define	EV_QSIZE	256	/* may need tuning; this uses 2k */
     51   1.1       oki 
     52   1.1       oki struct evvar {
     53   1.1       oki 	u_int	ev_get;		/* get (read) index (modified synchronously) */
     54   1.1       oki 	volatile u_int ev_put;	/* put (write) index (modified by interrupt) */
     55   1.1       oki 	struct	selinfo ev_sel;	/* process selecting */
     56   1.1       oki 	struct	proc *ev_io;	/* process that opened queue (can get SIGIO) */
     57  1.10   tsutsui 	bool	ev_wanted;	/* wake up on input ready */
     58  1.10   tsutsui 	bool	ev_async;	/* send SIGIO on input ready */
     59   1.1       oki 	struct	firm_event *ev_q;/* circular buffer (queue) of events */
     60  1.10   tsutsui 	kmutex_t *ev_lock;	/* lock from the parent device */
     61  1.10   tsutsui 	kcondvar_t ev_cv;	/* condvar(9) to delever signal */
     62   1.1       oki };
     63   1.1       oki 
     64  1.10   tsutsui void	ev_init(struct evvar *, const char *, kmutex_t *);
     65   1.5       chs void	ev_fini(struct evvar *);
     66   1.5       chs int	ev_read(struct evvar *, struct uio *, int);
     67   1.6  christos int	ev_select(struct evvar *, int, struct lwp *);
     68   1.6  christos int	ev_poll(struct evvar *, int, struct lwp *);
     69  1.10   tsutsui void	ev_wakeup(struct evvar *);
     70   1.5       chs int	ev_kqfilter(struct evvar *, struct knote *);
     71   1.1       oki 
     72   1.1       oki /*
     73   1.1       oki  * PEVENT is set just above PSOCK, which is just above TTIPRI, on the
     74   1.1       oki  * theory that mouse and keyboard `user' input should be quick.
     75   1.1       oki  */
     76   1.1       oki #define	PEVENT	23
     77