x68kIo.c revision 1406604b 
1/* $NetBSD: x68kIo.c,v 1.4 2025/06/17 15:53:57 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;
88
89    input_lock();
90    olderrno = errno;
91    x68kEnqueueEvents();
92    errno = olderrno;
93    input_unlock();
94}
95
96/*--------------------------------------------------------------------
97 * ProcessInputEvents --
98 *	Retrieve all waiting input events and pass them to DIX in their
99 *	correct chronological order. Only reads from the system pointer
100 *	and keyboard.
101 *
102 * Results:
103 *	None.
104 *
105 * Side Effects:
106 *	Events are passed to the DIX layer.
107 *
108 *-----------------------------------------------------------------*/
109void
110ProcessInputEvents(void)
111{
112    (void) mieqProcessInputEvents ();
113}
114
115/*--------------------------------------------------------------------
116 * x68kEnqueueEvents
117 *	When a SIGIO is received, read device hard events and
118 *	enqueue them using the mi event queue
119 */
120
121static void
122x68kEnqueueEvents(void)
123{
124    Firm_event	*ptrEvents,	/* Current pointer event */
125		*kbdEvents;	/* Current keyboard event */
126    int		numPtrEvents,	/* Number of remaining pointer events */
127		numKbdEvents;	/* Number of remaining keyboard events */
128    int		nPE,		/* Original number of pointer events */
129		nKE;		/* Original number of keyboard events */
130    Bool	PtrAgain,	/* need to (re)read */
131		KbdAgain;	/* need to (re)read */
132    DeviceIntPtr        pPointer;
133    DeviceIntPtr	pKeyboard;
134    X68kKbdPrivPtr      kbdPriv;
135    X68kMousePrivPtr    ptrPriv;
136
137    pPointer = x68kPointerDevice;
138    pKeyboard = x68kKeyboardDevice;
139    ptrPriv = (X68kMousePrivPtr) pPointer->public.devicePrivate;
140    kbdPriv = (X68kKbdPrivPtr) pKeyboard->public.devicePrivate;
141    if (!pPointer->public.on || !pKeyboard->public.on)
142	return;
143
144    numPtrEvents = 0;
145    PtrAgain = TRUE;
146    numKbdEvents = 0;
147    KbdAgain = TRUE;
148    ptrEvents = NULL;	/* XXX gcc */
149    kbdEvents = NULL;	/* XXX gcc */
150
151    /*
152     * So long as one event from either device remains unprocess, we loop:
153     * Take the oldest remaining event and pass it to the proper module
154     * for processing. The DDXEvent will be sent to ProcessInput by the
155     * function called.
156     */
157    while (1) {
158	/*
159	 * Get events from both the pointer and the keyboard, storing the number
160	 * of events gotten in nPE and nKE and keeping the start of both arrays
161	 * in pE and kE
162	 */
163	if ((numPtrEvents == 0) && PtrAgain) {
164	    ptrEvents = x68kMouseGetEvents (ptrPriv->fd, &nPE, &PtrAgain);
165	    numPtrEvents = nPE;
166	}
167	if ((numKbdEvents == 0) && KbdAgain) {
168	    kbdEvents = x68kKbdGetEvents (kbdPriv->fd, &nKE, &KbdAgain);
169	    numKbdEvents = nKE;
170	}
171	if ((numPtrEvents == 0) && (numKbdEvents == 0))
172	    break;
173	if (numPtrEvents && numKbdEvents) {
174	    if (timercmp (&kbdEvents->time, &ptrEvents->time, <)) {
175		x68kKbdEnqueueEvent (pKeyboard, kbdEvents);
176		numKbdEvents--;
177		kbdEvents++;
178	    } else {
179		x68kMouseEnqueueEvent (pPointer, ptrEvents);
180		numPtrEvents--;
181		ptrEvents++;
182	    }
183	} else if (numKbdEvents) {
184	    x68kKbdEnqueueEvent (pKeyboard, kbdEvents);
185	    numKbdEvents--;
186	    kbdEvents++;
187	} else {
188	    x68kMouseEnqueueEvent (pPointer, ptrEvents);
189	    numPtrEvents--;
190	    ptrEvents++;
191	}
192    }
193}
194
195/* EOF x68kIo.c */
196