x68kIo.c revision ab290810 
1/* $NetBSD: x68kIo.c,v 1.3 2020/08/01 20:09:03 tsutsui Exp $ */
2/*-------------------------------------------------------------------------
3 * Copyright (c) 1996 Yasushi Yamasaki
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *-----------------------------------------------------------------------*/
26
27/*-
28 *
29 * Copyright (c) 1987 by the Regents of the University of California
30 *
31 * Permission to use, copy, modify, and distribute this
32 * software and its documentation for any purpose and without
33 * fee is hereby granted, provided that the above copyright
34 * notice appear in all copies.  The University of California
35 * makes no representations about the suitability of this
36 * software for any purpose.  It is provided "as is" without
37 * express or implied warranty.
38 *
39 *
40 */
41
42/************************************************************
43Copyright 1987 by Sun Microsystems, Inc. Mountain View, CA.
44
45                    All Rights Reserved
46
47Permission  to  use,  copy,  modify,  and  distribute   this
48software  and  its documentation for any purpose and without
49fee is hereby granted, provided that the above copyright no-
50tice  appear  in all copies and that both that copyright no-
51tice and this permission notice appear in  supporting  docu-
52mentation,  and  that the names of Sun or X Consortium
53not be used in advertising or publicity pertaining to
54distribution  of  the software  without specific prior
55written permission. Sun and X Consortium make no
56representations about the suitability of this software for
57any purpose. It is provided "as is" without any express or
58implied warranty.
59
60SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO  THIS  SOFTWARE,
61INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
62NESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SUN BE  LI-
63ABLE  FOR  ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
64ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,  DATA  OR
65PROFITS,  WHETHER  IN  AN  ACTION OF CONTRACT, NEGLIGENCE OR
66OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
67THE USE OR PERFORMANCE OF THIS SOFTWARE.
68
69********************************************************/
70
71#include "x68k.h"
72#include "mi.h"
73
74static void x68kEnqueueEvents(void);
75
76/*--------------------------------------------------------------------
77 * function "x68kSigIOHandler"
78 *
79 *  purpose:  handles signals from input devices.
80 *            enqueue inputs into mi event queue
81 *  argument: (int)sig
82 *  returns:  nothing
83 *------------------------------------------------------------------*/
84void
85x68kSigIOHandler(int sig)
86{
87    int olderrno = errno;
88
89    x68kEnqueueEvents();
90    errno = olderrno;
91}
92
93/*--------------------------------------------------------------------
94 * ProcessInputEvents --
95 *	Retrieve all waiting input events and pass them to DIX in their
96 *	correct chronological order. Only reads from the system pointer
97 *	and keyboard.
98 *
99 * Results:
100 *	None.
101 *
102 * Side Effects:
103 *	Events are passed to the DIX layer.
104 *
105 *-----------------------------------------------------------------*/
106void
107ProcessInputEvents(void)
108{
109    (void) mieqProcessInputEvents ();
110}
111
112/*--------------------------------------------------------------------
113 * x68kEnqueueEvents
114 *	When a SIGIO is received, read device hard events and
115 *	enqueue them using the mi event queue
116 */
117
118static void
119x68kEnqueueEvents(void)
120{
121    Firm_event	*ptrEvents,	/* Current pointer event */
122		*kbdEvents;	/* Current keyboard event */
123    int		numPtrEvents,	/* Number of remaining pointer events */
124		numKbdEvents;	/* Number of remaining keyboard events */
125    int		nPE,		/* Original number of pointer events */
126		nKE;		/* Original number of keyboard events */
127    Bool	PtrAgain,	/* need to (re)read */
128		KbdAgain;	/* need to (re)read */
129    DeviceIntPtr        pPointer;
130    DeviceIntPtr	pKeyboard;
131    X68kKbdPrivPtr      kbdPriv;
132    X68kMousePrivPtr    ptrPriv;
133
134    pPointer = x68kPointerDevice;
135    pKeyboard = x68kKeyboardDevice;
136    ptrPriv = (X68kMousePrivPtr) pPointer->public.devicePrivate;
137    kbdPriv = (X68kKbdPrivPtr) pKeyboard->public.devicePrivate;
138    if (!pPointer->public.on || !pKeyboard->public.on)
139	return;
140
141    numPtrEvents = 0;
142    PtrAgain = TRUE;
143    numKbdEvents = 0;
144    KbdAgain = TRUE;
145    ptrEvents = NULL;	/* XXX gcc */
146    kbdEvents = NULL;	/* XXX gcc */
147
148    /*
149     * So long as one event from either device remains unprocess, we loop:
150     * Take the oldest remaining event and pass it to the proper module
151     * for processing. The DDXEvent will be sent to ProcessInput by the
152     * function called.
153     */
154    while (1) {
155	/*
156	 * Get events from both the pointer and the keyboard, storing the number
157	 * of events gotten in nPE and nKE and keeping the start of both arrays
158	 * in pE and kE
159	 */
160	if ((numPtrEvents == 0) && PtrAgain) {
161	    ptrEvents = x68kMouseGetEvents (ptrPriv->fd, &nPE, &PtrAgain);
162	    numPtrEvents = nPE;
163	}
164	if ((numKbdEvents == 0) && KbdAgain) {
165	    kbdEvents = x68kKbdGetEvents (kbdPriv->fd, &nKE, &KbdAgain);
166	    numKbdEvents = nKE;
167	}
168	if ((numPtrEvents == 0) && (numKbdEvents == 0))
169	    break;
170	if (numPtrEvents && numKbdEvents) {
171	    if (timercmp (&kbdEvents->time, &ptrEvents->time, <)) {
172		x68kKbdEnqueueEvent (pKeyboard, kbdEvents);
173		numKbdEvents--;
174		kbdEvents++;
175	    } else {
176		x68kMouseEnqueueEvent (pPointer, ptrEvents);
177		numPtrEvents--;
178		ptrEvents++;
179	    }
180	} else if (numKbdEvents) {
181	    x68kKbdEnqueueEvent (pKeyboard, kbdEvents);
182	    numKbdEvents--;
183	    kbdEvents++;
184	} else {
185	    x68kMouseEnqueueEvent (pPointer, ptrEvents);
186	    numPtrEvents--;
187	    ptrEvents++;
188	}
189    }
190}
191
192/* EOF x68kIo.c */
193