|
428
|
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.
|
|
1268
|
4 Copyright (C) 1995, 2002, 2003 Ben Wing.
|
|
428
|
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 "device.h"
|
|
872
|
29 #include "console-tty-impl.h"
|
|
428
|
30 #include "events.h"
|
|
|
31 #include "frame.h"
|
|
|
32 #include "process.h"
|
|
|
33
|
|
|
34 #include "sysproc.h"
|
|
|
35 #include "syswait.h"
|
|
|
36 #include "systime.h"
|
|
|
37
|
|
|
38 /* Mask of bits indicating the descriptors that we wait for input on */
|
|
|
39 extern SELECT_TYPE input_wait_mask, non_fake_input_wait_mask;
|
|
|
40 extern SELECT_TYPE process_only_mask, tty_only_mask;
|
|
|
41
|
|
|
42 static struct event_stream *tty_event_stream;
|
|
|
43
|
|
1292
|
44 #ifdef WIN32_ANY
|
|
|
45 extern int mswindows_is_blocking;
|
|
|
46 #endif
|
|
|
47
|
|
3735
|
48 static int last_quit_check_signal_tick_count;
|
|
|
49
|
|
428
|
50
|
|
|
51 /************************************************************************/
|
|
|
52 /* timeout events */
|
|
|
53 /************************************************************************/
|
|
|
54
|
|
|
55 /* The pending timers are stored in an ordered list, where the first timer
|
|
|
56 on the list is the first one to fire. Times recorded here are
|
|
|
57 absolute. */
|
|
|
58 static struct low_level_timeout *tty_timer_queue;
|
|
|
59
|
|
|
60 static int
|
|
|
61 emacs_tty_add_timeout (EMACS_TIME thyme)
|
|
|
62 {
|
|
|
63 return add_low_level_timeout (&tty_timer_queue, thyme);
|
|
|
64 }
|
|
|
65
|
|
|
66 static void
|
|
|
67 emacs_tty_remove_timeout (int id)
|
|
|
68 {
|
|
|
69 remove_low_level_timeout (&tty_timer_queue, id);
|
|
|
70 }
|
|
|
71
|
|
|
72 static void
|
|
440
|
73 tty_timeout_to_emacs_event (Lisp_Event *emacs_event)
|
|
428
|
74 {
|
|
934
|
75 /* timeout events have nil as channel */
|
|
|
76 SET_EVENT_TYPE (emacs_event, timeout_event);
|
|
|
77 SET_EVENT_TIMESTAMP_ZERO (emacs_event); /* #### */
|
|
1268
|
78 SET_EVENT_TIMEOUT_INTERVAL_ID (emacs_event,
|
|
|
79 pop_low_level_timeout (&tty_timer_queue, 0));
|
|
1204
|
80 SET_EVENT_TIMEOUT_FUNCTION (emacs_event, Qnil);
|
|
|
81 SET_EVENT_TIMEOUT_OBJECT (emacs_event, Qnil);
|
|
428
|
82 }
|
|
|
83
|
|
|
84
|
|
|
85
|
|
|
86 static int
|
|
1268
|
87 emacs_tty_event_pending_p (int how_many)
|
|
428
|
88 {
|
|
3735
|
89 Lisp_Object event;
|
|
|
90 int tick_count_val;
|
|
|
91
|
|
|
92 /* Cf. the comments on emacs_Xt_event_pending_p in event-xlike-inc.c . */
|
|
|
93
|
|
1268
|
94 if (!how_many)
|
|
428
|
95 {
|
|
|
96 EMACS_TIME sometime;
|
|
3735
|
97
|
|
|
98 /* (1) Any pending events in the dispatch queue? */
|
|
|
99 if (!NILP(dispatch_event_queue))
|
|
|
100 {
|
|
|
101 return 1;
|
|
|
102 }
|
|
|
103
|
|
|
104 /* (2) Any TTY or process input available? */
|
|
|
105 if (poll_fds_for_input (non_fake_input_wait_mask))
|
|
|
106 return 1;
|
|
|
107
|
|
|
108 /* (3) Any timeout input available? */
|
|
428
|
109 EMACS_GET_TIME (sometime);
|
|
|
110 if (tty_timer_queue &&
|
|
|
111 EMACS_TIME_EQUAL_OR_GREATER (sometime, tty_timer_queue->time))
|
|
|
112 return 1;
|
|
3735
|
113 }
|
|
|
114 else
|
|
|
115 {
|
|
|
116 /* HOW_MANY > 0 */
|
|
|
117 EVENT_CHAIN_LOOP (event, dispatch_event_queue)
|
|
|
118 {
|
|
|
119 if (command_event_p (event))
|
|
|
120 {
|
|
|
121 how_many--;
|
|
|
122 if (how_many <= 0)
|
|
|
123 return 1;
|
|
|
124 }
|
|
|
125 }
|
|
1268
|
126
|
|
428
|
127 }
|
|
|
128
|
|
3735
|
129 tick_count_val = quit_check_signal_tick_count;
|
|
|
130
|
|
|
131 /* Checking in_modal_loop here is a bit cargo-cultish, since its use is
|
|
|
132 specific to builds with a window system. */
|
|
|
133 if (!in_modal_loop &&
|
|
|
134 (last_quit_check_signal_tick_count != tick_count_val))
|
|
|
135 {
|
|
|
136 last_quit_check_signal_tick_count = tick_count_val;
|
|
|
137
|
|
|
138 /* We need to drain the entire queue now -- if we only drain part of
|
|
|
139 it, we may later on end up with events actually pending but
|
|
|
140 detect_input_pending() returning false because there wasn't
|
|
|
141 another SIGIO. */
|
|
|
142 event_stream_drain_queue ();
|
|
|
143
|
|
|
144 if (!how_many)
|
|
|
145 return !NILP (dispatch_event_queue);
|
|
|
146
|
|
|
147 EVENT_CHAIN_LOOP (event, dispatch_event_queue)
|
|
|
148 {
|
|
|
149 if (command_event_p (event))
|
|
|
150 {
|
|
|
151 how_many--;
|
|
|
152 if (how_many <= 0)
|
|
|
153 return 1;
|
|
|
154 }
|
|
|
155 }
|
|
|
156 }
|
|
|
157
|
|
|
158 return 0;
|
|
428
|
159 }
|
|
|
160
|
|
|
161 static void
|
|
440
|
162 emacs_tty_next_event (Lisp_Event *emacs_event)
|
|
428
|
163 {
|
|
|
164 while (1)
|
|
|
165 {
|
|
|
166 int ndesc;
|
|
|
167 int i;
|
|
|
168 SELECT_TYPE temp_mask = input_wait_mask;
|
|
|
169 EMACS_TIME time_to_block;
|
|
|
170 EMACS_SELECT_TIME select_time_to_block, *pointer_to_this;
|
|
|
171
|
|
3541
|
172 if (!NILP (dispatch_event_queue))
|
|
|
173 {
|
|
|
174 Lisp_Object event, event2;
|
|
|
175 event2 = wrap_event (emacs_event);
|
|
|
176 event = dequeue_dispatch_event ();
|
|
|
177 Fcopy_event (event, event2);
|
|
|
178 Fdeallocate_event (event);
|
|
|
179 return;
|
|
|
180 }
|
|
|
181
|
|
428
|
182 if (!get_low_level_timeout_interval (tty_timer_queue, &time_to_block))
|
|
|
183 /* no timer events; block indefinitely */
|
|
|
184 pointer_to_this = 0;
|
|
|
185 else
|
|
|
186 {
|
|
|
187 EMACS_TIME_TO_SELECT_TIME (time_to_block, select_time_to_block);
|
|
|
188 pointer_to_this = &select_time_to_block;
|
|
|
189 }
|
|
|
190
|
|
1292
|
191 #ifdef WIN32_ANY
|
|
|
192 mswindows_is_blocking = 1;
|
|
|
193 #endif
|
|
428
|
194 ndesc = select (MAXDESC, &temp_mask, 0, 0, pointer_to_this);
|
|
1292
|
195 #ifdef WIN32_ANY
|
|
|
196 mswindows_is_blocking = 0;
|
|
|
197 #endif
|
|
428
|
198 if (ndesc > 0)
|
|
|
199 {
|
|
|
200 /* Look for a TTY event */
|
|
|
201 for (i = 0; i < MAXDESC; i++)
|
|
|
202 {
|
|
|
203 /* To avoid race conditions (among other things, an infinite
|
|
|
204 loop when called from Fdiscard_input()), we must return
|
|
|
205 user events ahead of process events. */
|
|
|
206 if (FD_ISSET (i, &temp_mask) && FD_ISSET (i, &tty_only_mask))
|
|
|
207 {
|
|
1204
|
208 struct console *c = find_tty_or_stream_console_from_fd (i);
|
|
428
|
209
|
|
|
210 assert (c);
|
|
771
|
211 if (read_event_from_tty_or_stream_desc (emacs_event, c))
|
|
428
|
212 return;
|
|
|
213 }
|
|
|
214 }
|
|
|
215
|
|
|
216 /* Look for a process event */
|
|
|
217 for (i = 0; i < MAXDESC; i++)
|
|
|
218 {
|
|
|
219 if (FD_ISSET (i, &temp_mask) && FD_ISSET (i, &process_only_mask))
|
|
|
220 {
|
|
|
221 Lisp_Object process;
|
|
440
|
222 Lisp_Process *p = get_process_from_usid (FD_TO_USID(i));
|
|
428
|
223
|
|
|
224 assert (p);
|
|
793
|
225 process = wrap_process (p);
|
|
934
|
226 set_event_type (emacs_event, process_event);
|
|
|
227 /* process events have nil as channel */
|
|
|
228 SET_EVENT_TIMESTAMP_ZERO (emacs_event); /* #### */
|
|
1204
|
229 SET_EVENT_PROCESS_PROCESS (emacs_event, process);
|
|
428
|
230 return;
|
|
|
231 }
|
|
|
232 }
|
|
|
233
|
|
|
234 /* We might get here when a fake event came through a signal. */
|
|
|
235 /* Return a dummy event, so that a cycle of the command loop will
|
|
|
236 occur. */
|
|
|
237 drain_signal_event_pipe ();
|
|
934
|
238 set_event_type (emacs_event, eval_event);
|
|
|
239 /* eval events have nil as channel */
|
|
1204
|
240 SET_EVENT_EVAL_FUNCTION (emacs_event, Qidentity);
|
|
|
241 SET_EVENT_EVAL_OBJECT (emacs_event, Qnil);
|
|
428
|
242 return;
|
|
|
243 }
|
|
|
244 else if (ndesc == 0) /* timeout fired */
|
|
|
245 {
|
|
|
246 tty_timeout_to_emacs_event (emacs_event);
|
|
|
247 return;
|
|
|
248 }
|
|
|
249 }
|
|
|
250 }
|
|
|
251
|
|
|
252 static void
|
|
2286
|
253 emacs_tty_format_magic_event (Lisp_Event *UNUSED (emacs_event),
|
|
|
254 Lisp_Object UNUSED (pstream))
|
|
788
|
255 {
|
|
|
256 /* Nothing to do currently */
|
|
|
257 }
|
|
|
258
|
|
|
259 static int
|
|
2286
|
260 emacs_tty_compare_magic_event (Lisp_Event *UNUSED (e1),
|
|
|
261 Lisp_Event *UNUSED (e2))
|
|
788
|
262 {
|
|
|
263 return 1;
|
|
|
264 }
|
|
|
265
|
|
|
266 static Hashcode
|
|
2286
|
267 emacs_tty_hash_magic_event (Lisp_Event *UNUSED (e))
|
|
788
|
268 {
|
|
|
269 return 0;
|
|
|
270 }
|
|
|
271
|
|
|
272 static void
|
|
2286
|
273 emacs_tty_handle_magic_event (Lisp_Event *UNUSED (emacs_event))
|
|
428
|
274 {
|
|
|
275 /* Nothing to do currently */
|
|
|
276 }
|
|
|
277
|
|
|
278
|
|
|
279 static void
|
|
853
|
280 emacs_tty_select_process (Lisp_Process *process, int doin, int doerr)
|
|
428
|
281 {
|
|
853
|
282 int infd, errfd;
|
|
|
283
|
|
|
284 event_stream_unixoid_select_process (process, doin, doerr, &infd, &errfd);
|
|
428
|
285 }
|
|
|
286
|
|
|
287 static void
|
|
853
|
288 emacs_tty_unselect_process (Lisp_Process *process, int doin, int doerr)
|
|
428
|
289 {
|
|
853
|
290 int infd, errfd;
|
|
|
291
|
|
|
292 event_stream_unixoid_unselect_process (process, doin, doerr, &infd, &errfd);
|
|
428
|
293 }
|
|
|
294
|
|
|
295 static void
|
|
|
296 emacs_tty_select_console (struct console *con)
|
|
|
297 {
|
|
|
298 event_stream_unixoid_select_console (con);
|
|
|
299 }
|
|
|
300
|
|
|
301 static void
|
|
|
302 emacs_tty_unselect_console (struct console *con)
|
|
|
303 {
|
|
|
304 event_stream_unixoid_unselect_console (con);
|
|
|
305 }
|
|
|
306
|
|
|
307 static void
|
|
1204
|
308 emacs_tty_drain_queue (void)
|
|
428
|
309 {
|
|
1204
|
310 drain_tty_devices ();
|
|
428
|
311 }
|
|
|
312
|
|
853
|
313 static void
|
|
|
314 emacs_tty_create_io_streams (void* inhandle, void* outhandle,
|
|
|
315 void *errhandle, Lisp_Object* instream,
|
|
|
316 Lisp_Object* outstream,
|
|
|
317 Lisp_Object* errstream,
|
|
|
318 USID* in_usid,
|
|
|
319 USID* err_usid,
|
|
|
320 int flags)
|
|
428
|
321 {
|
|
853
|
322 event_stream_unixoid_create_io_streams
|
|
|
323 (inhandle, outhandle, errhandle, instream, outstream,
|
|
|
324 errstream, in_usid, err_usid, flags);
|
|
428
|
325 }
|
|
|
326
|
|
853
|
327 static void
|
|
|
328 emacs_tty_delete_io_streams (Lisp_Object instream,
|
|
|
329 Lisp_Object outstream,
|
|
|
330 Lisp_Object errstream,
|
|
|
331 USID* in_usid,
|
|
|
332 USID* err_usid)
|
|
428
|
333 {
|
|
853
|
334 event_stream_unixoid_delete_io_streams
|
|
|
335 (instream, outstream, errstream, in_usid, err_usid);
|
|
428
|
336 }
|
|
|
337
|
|
|
338
|
|
|
339 /************************************************************************/
|
|
|
340 /* initialization */
|
|
|
341 /************************************************************************/
|
|
|
342
|
|
|
343 void
|
|
|
344 reinit_vars_of_event_tty (void)
|
|
|
345 {
|
|
1204
|
346 tty_event_stream = xnew_and_zero (struct event_stream);
|
|
428
|
347
|
|
|
348 tty_event_stream->event_pending_p = emacs_tty_event_pending_p;
|
|
|
349 tty_event_stream->next_event_cb = emacs_tty_next_event;
|
|
|
350 tty_event_stream->handle_magic_event_cb = emacs_tty_handle_magic_event;
|
|
788
|
351 tty_event_stream->format_magic_event_cb = emacs_tty_format_magic_event;
|
|
|
352 tty_event_stream->compare_magic_event_cb= emacs_tty_compare_magic_event;
|
|
|
353 tty_event_stream->hash_magic_event_cb = emacs_tty_hash_magic_event;
|
|
428
|
354 tty_event_stream->add_timeout_cb = emacs_tty_add_timeout;
|
|
|
355 tty_event_stream->remove_timeout_cb = emacs_tty_remove_timeout;
|
|
|
356 tty_event_stream->select_console_cb = emacs_tty_select_console;
|
|
|
357 tty_event_stream->unselect_console_cb = emacs_tty_unselect_console;
|
|
|
358 tty_event_stream->select_process_cb = emacs_tty_select_process;
|
|
|
359 tty_event_stream->unselect_process_cb = emacs_tty_unselect_process;
|
|
1204
|
360 tty_event_stream->drain_queue_cb = emacs_tty_drain_queue;
|
|
853
|
361 tty_event_stream->create_io_streams_cb = emacs_tty_create_io_streams;
|
|
|
362 tty_event_stream->delete_io_streams_cb = emacs_tty_delete_io_streams;
|
|
3735
|
363
|
|
|
364 last_quit_check_signal_tick_count = 0;
|
|
428
|
365 }
|
|
|
366
|
|
|
367 void
|
|
|
368 vars_of_event_tty (void)
|
|
|
369 {
|
|
|
370 }
|
|
|
371
|
|
|
372 void
|
|
|
373 init_event_tty_late (void)
|
|
|
374 {
|
|
|
375 event_stream = tty_event_stream;
|
|
|
376 }
|
