x68kIo.c revision ba64b02e 
1/* $NetBSD: x68kIo.c,v 1.1 2014/03/01 19:34:47 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 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *      This product includes software developed by Yasushi Yamasaki
17 * 4. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *-----------------------------------------------------------------------*/
31
32/*-
33 *
34 * Copyright (c) 1987 by the Regents of the University of California
35 *
36 * Permission to use, copy, modify, and distribute this
37 * software and its documentation for any purpose and without
38 * fee is hereby granted, provided that the above copyright
39 * notice appear in all copies.  The University of California
40 * makes no representations about the suitability of this
41 * software for any purpose.  It is provided "as is" without
42 * express or implied warranty.
43 *
44 *
45 */
46
47/************************************************************
48Copyright 1987 by Sun Microsystems, Inc. Mountain View, CA.
49
50                    All Rights Reserved
51
52Permission  to  use,  copy,  modify,  and  distribute   this
53software  and  its documentation for any purpose and without
54fee is hereby granted, provided that the above copyright no-
55tice  appear  in all copies and that both that copyright no-
56tice and this permission notice appear in  supporting  docu-
57mentation,  and  that the names of Sun or X Consortium
58not be used in advertising or publicity pertaining to
59distribution  of  the software  without specific prior
60written permission. Sun and X Consortium make no
61representations about the suitability of this software for
62any purpose. It is provided "as is" without any express or
63implied warranty.
64
65SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO  THIS  SOFTWARE,
66INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
67NESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SUN BE  LI-
68ABLE  FOR  ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
69ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,  DATA  OR
70PROFITS,  WHETHER  IN  AN  ACTION OF CONTRACT, NEGLIGENCE OR
71OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
72THE USE OR PERFORMANCE OF THIS SOFTWARE.
73
74********************************************************/
75
76#include "x68k.h"
77#include "mi.h"
78
79static void x68kEnqueueEvents(void);
80
81/*--------------------------------------------------------------------
82 * function "x68kSigIOHandler"
83 *
84 *  purpose:  handles signals from input devices.
85 *            enqueue inputs into mi event queue
86 *  argument: (int)sig
87 *  returns:  nothing
88 *------------------------------------------------------------------*/
89void
90x68kSigIOHandler(int sig)
91{
92    int olderrno = errno;
93
94    x68kEnqueueEvents();
95    errno = olderrno;
96}
97
98/*--------------------------------------------------------------------
99 * ProcessInputEvents --
100 *	Retrieve all waiting input events and pass them to DIX in their
101 *	correct chronological order. Only reads from the system pointer
102 *	and keyboard.
103 *
104 * Results:
105 *	None.
106 *
107 * Side Effects:
108 *	Events are passed to the DIX layer.
109 *
110 *-----------------------------------------------------------------*/
111void
112ProcessInputEvents(void)
113{
114    (void) mieqProcessInputEvents ();
115}
116
117/*--------------------------------------------------------------------
118 * x68kEnqueueEvents
119 *	When a SIGIO is received, read device hard events and
120 *	enqueue them using the mi event queue
121 */
122
123static void
124x68kEnqueueEvents(void)
125{
126    Firm_event	*ptrEvents,    	/* Current pointer event */
127		*kbdEvents;    	/* Current keyboard event */
128    int		numPtrEvents, 	/* Number of remaining pointer events */
129		numKbdEvents;   /* Number of remaining keyboard events */
130    int		nPE,   	    	/* Original number of pointer events */
131		nKE;   	    	/* Original number of keyboard events */
132    Bool	PtrAgain,	/* need to (re)read */
133		KbdAgain;	/* need to (re)read */
134    DeviceIntPtr        pPointer;
135    DeviceIntPtr	pKeyboard;
136    X68kKbdPrivPtr      kbdPriv;
137    X68kMousePrivPtr    ptrPriv;
138
139    pPointer = x68kPointerDevice;
140    pKeyboard = x68kKeyboardDevice;
141    ptrPriv = (X68kMousePrivPtr) pPointer->public.devicePrivate;
142    kbdPriv = (X68kKbdPrivPtr) pKeyboard->public.devicePrivate;
143    if (!pPointer->public.on || !pKeyboard->public.on)
144	return;
145
146    numPtrEvents = 0;
147    PtrAgain = TRUE;
148    numKbdEvents = 0;
149    KbdAgain = TRUE;
150    ptrEvents = NULL;	/* XXX gcc */
151    kbdEvents = NULL;	/* XXX gcc */
152
153    /*
154     * So long as one event from either device remains unprocess, we loop:
155     * Take the oldest remaining event and pass it to the proper module
156     * for processing. The DDXEvent will be sent to ProcessInput by the
157     * function called.
158     */
159    while (1) {
160	/*
161	 * Get events from both the pointer and the keyboard, storing the number
162	 * of events gotten in nPE and nKE and keeping the start of both arrays
163	 * in pE and kE
164	 */
165	if ((numPtrEvents == 0) && PtrAgain) {
166	    ptrEvents = x68kMouseGetEvents (ptrPriv->fd, &nPE, &PtrAgain);
167	    numPtrEvents = nPE;
168	}
169	if ((numKbdEvents == 0) && KbdAgain) {
170	    kbdEvents = x68kKbdGetEvents (kbdPriv->fd, &nKE, &KbdAgain);
171	    numKbdEvents = nKE;
172	}
173	if ((numPtrEvents == 0) && (numKbdEvents == 0))
174	    break;
175	if (numPtrEvents && numKbdEvents) {
176	    if (timercmp (&kbdEvents->time, &ptrEvents->time, <)) {
177		x68kKbdEnqueueEvent (pKeyboard, kbdEvents);
178		numKbdEvents--;
179		kbdEvents++;
180	    } else {
181		x68kMouseEnqueueEvent (pPointer, ptrEvents);
182		numPtrEvents--;
183		ptrEvents++;
184	    }
185	} else if (numKbdEvents) {
186	    x68kKbdEnqueueEvent (pKeyboard, kbdEvents);
187	    numKbdEvents--;
188	    kbdEvents++;
189	} else {
190	    x68kMouseEnqueueEvent (pPointer, ptrEvents);
191	    numPtrEvents--;
192	    ptrEvents++;
193	}
194    }
195}
196
197/* EOF x68kIo.c */
198