|
0
|
1 /* The event_stream interface for tty's.
|
|
|
2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
|
|
|
3 Copyright (C) 1995 Sun Microsystems, Inc.
|
|
|
4 Copyright (C) 1995 Ben Wing.
|
|
|
5
|
|
|
6 This file is part of XEmacs.
|
|
|
7
|
|
|
8 XEmacs is free software; you can redistribute it and/or modify it
|
|
|
9 under the terms of the GNU General Public License as published by the
|
|
|
10 Free Software Foundation; either version 2, or (at your option) any
|
|
|
11 later version.
|
|
|
12
|
|
|
13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
|
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
16 for more details.
|
|
|
17
|
|
|
18 You should have received a copy of the GNU General Public License
|
|
|
19 along with XEmacs; see the file COPYING. If not, write to
|
|
|
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
21 Boston, MA 02111-1307, USA. */
|
|
|
22
|
|
|
23 /* Synched up with: Not in FSF. */
|
|
|
24
|
|
|
25 #include <config.h>
|
|
|
26 #include "lisp.h"
|
|
|
27
|
|
|
28 #include "blocktype.h"
|
|
|
29 #include "device.h"
|
|
|
30 #include "console-tty.h"
|
|
|
31 #include "events.h"
|
|
|
32 #include "frame.h"
|
|
|
33 #include "process.h"
|
|
|
34
|
|
|
35 #include "sysproc.h"
|
|
|
36 #include "syswait.h"
|
|
|
37 #include "systime.h"
|
|
|
38
|
|
|
39 /* Mask of bits indicating the descriptors that we wait for input on */
|
|
|
40 extern SELECT_TYPE input_wait_mask, non_fake_input_wait_mask;
|
|
|
41 extern SELECT_TYPE process_only_mask, tty_only_mask;
|
|
|
42
|
|
|
43 extern Lisp_Object Qdelete_device;
|
|
|
44
|
|
|
45 static struct event_stream *tty_event_stream;
|
|
|
46
|
|
|
47
|
|
|
48 /************************************************************************/
|
|
|
49 /* timeout events */
|
|
|
50 /************************************************************************/
|
|
|
51
|
|
|
52 /* The pending timers are stored in an ordered list, where the first timer
|
|
|
53 on the list is the first one to fire. Times recorded here are
|
|
|
54 absolute. */
|
|
|
55 static struct low_level_timeout *tty_timer_queue;
|
|
|
56
|
|
|
57 static int
|
|
|
58 emacs_tty_add_timeout (EMACS_TIME thyme)
|
|
|
59 {
|
|
|
60 return add_low_level_timeout (&tty_timer_queue, thyme);
|
|
|
61 }
|
|
|
62
|
|
|
63 static void
|
|
|
64 emacs_tty_remove_timeout (int id)
|
|
|
65 {
|
|
|
66 remove_low_level_timeout (&tty_timer_queue, id);
|
|
|
67 }
|
|
|
68
|
|
|
69 static void
|
|
|
70 tty_timeout_to_emacs_event (struct Lisp_Event *emacs_event)
|
|
|
71 {
|
|
|
72 emacs_event->event_type = timeout_event;
|
|
|
73 /* timeout events have nil as channel */
|
|
|
74 emacs_event->timestamp = 0; /* #### */
|
|
|
75 emacs_event->event.timeout.interval_id =
|
|
|
76 pop_low_level_timeout (&tty_timer_queue, 0);
|
|
|
77 }
|
|
|
78
|
|
|
79
|
|
|
80
|
|
|
81 static int
|
|
|
82 emacs_tty_event_pending_p (int user_p)
|
|
|
83 {
|
|
|
84 if (!user_p)
|
|
|
85 {
|
|
|
86 EMACS_TIME sometime;
|
|
|
87 /* see if there's a pending timeout. */
|
|
|
88 EMACS_GET_TIME (sometime);
|
|
|
89 if (tty_timer_queue &&
|
|
|
90 EMACS_TIME_EQUAL_OR_GREATER (sometime, tty_timer_queue->time))
|
|
|
91 return 1;
|
|
|
92 }
|
|
|
93
|
|
|
94 return poll_fds_for_input (user_p ? tty_only_mask :
|
|
|
95 non_fake_input_wait_mask);
|
|
|
96 }
|
|
|
97
|
|
|
98 static struct console *
|
|
|
99 find_console_from_fd (int fd)
|
|
|
100 {
|
|
|
101 Lisp_Object concons;
|
|
|
102
|
|
|
103 CONSOLE_LOOP (concons)
|
|
|
104 {
|
|
|
105 struct console *c;
|
|
|
106
|
|
|
107 c = XCONSOLE (XCAR (concons));
|
|
|
108 if (CONSOLE_TTY_P (c) && CONSOLE_TTY_DATA (c)->infd == fd)
|
|
|
109 return c;
|
|
|
110 }
|
|
|
111
|
|
|
112 return 0;
|
|
|
113 }
|
|
|
114
|
|
|
115 static void
|
|
|
116 emacs_tty_next_event (struct Lisp_Event *emacs_event)
|
|
|
117 {
|
|
|
118 while (1)
|
|
|
119 {
|
|
|
120 int ndesc;
|
|
|
121 int i;
|
|
|
122 SELECT_TYPE temp_mask = input_wait_mask;
|
|
|
123 EMACS_TIME time_to_block;
|
|
|
124 EMACS_SELECT_TIME select_time_to_block, *pointer_to_this;
|
|
|
125
|
|
|
126 if (!get_low_level_timeout_interval (tty_timer_queue, &time_to_block))
|
|
|
127 /* no timer events; block indefinitely */
|
|
|
128 pointer_to_this = 0;
|
|
|
129 else
|
|
|
130 {
|
|
|
131 EMACS_TIME_TO_SELECT_TIME (time_to_block, select_time_to_block);
|
|
|
132 pointer_to_this = &select_time_to_block;
|
|
|
133 }
|
|
|
134
|
|
|
135 ndesc = select (MAXDESC, &temp_mask, 0, 0, pointer_to_this);
|
|
|
136 if (ndesc > 0)
|
|
|
137 {
|
|
|
138 /* Look for a TTY event */
|
|
|
139 for (i = 0; i < MAXDESC; i++)
|
|
|
140 {
|
|
|
141 /* To avoid race conditions (among other things, an infinite
|
|
|
142 loop when called from Fdiscard_input()), we must return
|
|
|
143 user events ahead of process events. */
|
|
|
144 if (FD_ISSET (i, &temp_mask) && FD_ISSET (i, &tty_only_mask))
|
|
|
145 {
|
|
|
146 struct console *c = find_console_from_fd (i);
|
|
|
147
|
|
|
148 assert (c);
|
|
|
149 if (read_event_from_tty_or_stream_desc (emacs_event, c, i))
|
|
|
150 return;
|
|
|
151 }
|
|
|
152 }
|
|
|
153
|
|
|
154 /* Look for a process event */
|
|
|
155 for (i = 0; i < MAXDESC; i++)
|
|
|
156 {
|
|
|
157 if (FD_ISSET (i, &temp_mask) && FD_ISSET (i, &process_only_mask))
|
|
|
158 {
|
|
|
159 Lisp_Object process;
|
|
|
160 struct Lisp_Process *p =
|
|
|
161 get_process_from_input_descriptor (i);
|
|
|
162
|
|
|
163 assert (p);
|
|
|
164 XSETPROCESS (process, p);
|
|
|
165 emacs_event->event_type = process_event;
|
|
|
166 /* process events have nil as channel */
|
|
|
167 emacs_event->timestamp = 0; /* #### */
|
|
|
168 emacs_event->event.process.process = process;
|
|
|
169 return;
|
|
|
170 }
|
|
|
171 }
|
|
|
172
|
|
|
173 /* We might get here when a fake event came through a signal. */
|
|
|
174 /* Return a dummy event, so that a cycle of the command loop will
|
|
|
175 occur. */
|
|
|
176 drain_signal_event_pipe ();
|
|
|
177 emacs_event->event_type = eval_event;
|
|
|
178 /* eval events have nil as channel */
|
|
|
179 emacs_event->event.eval.function = Qidentity;
|
|
|
180 emacs_event->event.eval.object = Qnil;
|
|
|
181 return;
|
|
|
182 }
|
|
|
183 else if (ndesc == 0) /* timeout fired */
|
|
|
184 {
|
|
|
185 tty_timeout_to_emacs_event (emacs_event);
|
|
|
186 return;
|
|
|
187 }
|
|
|
188 }
|
|
|
189 }
|
|
|
190
|
|
|
191 static void
|
|
|
192 emacs_tty_handle_magic_event (struct Lisp_Event *emacs_event)
|
|
|
193 {
|
|
|
194 /* Nothing to do currently */
|
|
|
195 }
|
|
|
196
|
|
|
197
|
|
|
198 static void
|
|
|
199 emacs_tty_select_process (struct Lisp_Process *process)
|
|
|
200 {
|
|
|
201 event_stream_unixoid_select_process (process);
|
|
|
202 }
|
|
|
203
|
|
|
204 static void
|
|
|
205 emacs_tty_unselect_process (struct Lisp_Process *process)
|
|
|
206 {
|
|
|
207 event_stream_unixoid_unselect_process (process);
|
|
|
208 }
|
|
|
209
|
|
|
210 static void
|
|
|
211 emacs_tty_select_console (struct console *con)
|
|
|
212 {
|
|
|
213 event_stream_unixoid_select_console (con);
|
|
|
214 }
|
|
|
215
|
|
|
216 static void
|
|
|
217 emacs_tty_unselect_console (struct console *con)
|
|
|
218 {
|
|
|
219 event_stream_unixoid_unselect_console (con);
|
|
|
220 }
|
|
|
221
|
|
|
222 static void
|
|
|
223 emacs_tty_quit_p (void)
|
|
|
224 {
|
|
|
225 /* Nothing to do currently because QUIT is handled through SIGINT.
|
|
|
226 This could change. */
|
|
|
227 }
|
|
|
228
|
|
|
229
|
|
|
230 /************************************************************************/
|
|
|
231 /* initialization */
|
|
|
232 /************************************************************************/
|
|
|
233
|
|
|
234 void
|
|
|
235 vars_of_event_tty (void)
|
|
|
236 {
|
|
|
237 tty_event_stream =
|
|
|
238 (struct event_stream *) xmalloc (sizeof (struct event_stream));
|
|
|
239
|
|
|
240 tty_event_stream->event_pending_p = emacs_tty_event_pending_p;
|
|
|
241 tty_event_stream->next_event_cb = emacs_tty_next_event;
|
|
|
242 tty_event_stream->handle_magic_event_cb = emacs_tty_handle_magic_event;
|
|
|
243 tty_event_stream->add_timeout_cb = emacs_tty_add_timeout;
|
|
|
244 tty_event_stream->remove_timeout_cb = emacs_tty_remove_timeout;
|
|
|
245 tty_event_stream->select_console_cb = emacs_tty_select_console;
|
|
|
246 tty_event_stream->unselect_console_cb = emacs_tty_unselect_console;
|
|
|
247 tty_event_stream->select_process_cb = emacs_tty_select_process;
|
|
|
248 tty_event_stream->unselect_process_cb = emacs_tty_unselect_process;
|
|
|
249 tty_event_stream->quit_p_cb = emacs_tty_quit_p;
|
|
|
250 }
|
|
|
251
|
|
|
252 void
|
|
|
253 init_event_tty_late (void)
|
|
|
254 {
|
|
|
255 event_stream = tty_event_stream;
|
|
|
256 }
|
