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.
6 This file is part of XEmacs.
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
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
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. */
23 /* Synched up with: Not in FSF. */
29 #include "console-tty.h"
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;
42 static struct event_stream *tty_event_stream;
45 /************************************************************************/
47 /************************************************************************/
49 /* The pending timers are stored in an ordered list, where the first timer
50 on the list is the first one to fire. Times recorded here are
52 static struct low_level_timeout *tty_timer_queue;
55 emacs_tty_add_timeout (EMACS_TIME thyme)
57 return add_low_level_timeout (&tty_timer_queue, thyme);
61 emacs_tty_remove_timeout (int id)
63 remove_low_level_timeout (&tty_timer_queue, id);
67 tty_timeout_to_emacs_event (Lisp_Event *emacs_event)
69 emacs_event->event_type = timeout_event;
70 /* timeout events have nil as channel */
71 emacs_event->timestamp = 0; /* #### */
72 emacs_event->event.timeout.interval_id =
73 pop_low_level_timeout (&tty_timer_queue, 0);
74 emacs_event->event.timeout.function = Qnil;
75 emacs_event->event.timeout.object = Qnil;
81 emacs_tty_event_pending_p (int user_p)
86 /* see if there's a pending timeout. */
87 EMACS_GET_TIME (sometime);
88 if (tty_timer_queue &&
89 EMACS_TIME_EQUAL_OR_GREATER (sometime, tty_timer_queue->time))
93 return poll_fds_for_input (user_p ? tty_only_mask :
94 non_fake_input_wait_mask);
98 tty_find_console_from_fd (int fd)
102 CONSOLE_LOOP (concons)
106 c = XCONSOLE (XCAR (concons));
107 if (CONSOLE_TTY_P (c) && CONSOLE_TTY_DATA (c)->infd == fd)
115 emacs_tty_next_event (Lisp_Event *emacs_event)
121 SELECT_TYPE temp_mask = input_wait_mask;
122 EMACS_TIME time_to_block;
123 EMACS_SELECT_TIME select_time_to_block, *pointer_to_this;
125 if (!get_low_level_timeout_interval (tty_timer_queue, &time_to_block))
126 /* no timer events; block indefinitely */
130 EMACS_TIME_TO_SELECT_TIME (time_to_block, select_time_to_block);
131 pointer_to_this = &select_time_to_block;
134 ndesc = select (MAXDESC, &temp_mask, 0, 0, pointer_to_this);
137 /* Look for a TTY event */
138 for (i = 0; i < MAXDESC; i++)
140 /* To avoid race conditions (among other things, an infinite
141 loop when called from Fdiscard_input()), we must return
142 user events ahead of process events. */
143 if (FD_ISSET (i, &temp_mask) && FD_ISSET (i, &tty_only_mask))
145 struct console *c = tty_find_console_from_fd (i);
148 if (read_event_from_tty_or_stream_desc (emacs_event, c, i))
153 /* Look for a process event */
154 for (i = 0; i < MAXDESC; i++)
156 if (FD_ISSET (i, &temp_mask) && FD_ISSET (i, &process_only_mask))
159 Lisp_Process *p = get_process_from_usid (FD_TO_USID(i));
162 XSETPROCESS (process, p);
163 emacs_event->event_type = process_event;
164 /* process events have nil as channel */
165 emacs_event->timestamp = 0; /* #### */
166 emacs_event->event.process.process = process;
171 /* We might get here when a fake event came through a signal. */
172 /* Return a dummy event, so that a cycle of the command loop will
174 drain_signal_event_pipe ();
175 emacs_event->event_type = eval_event;
176 /* eval events have nil as channel */
177 emacs_event->event.eval.function = Qidentity;
178 emacs_event->event.eval.object = Qnil;
181 else if (ndesc == 0) /* timeout fired */
183 tty_timeout_to_emacs_event (emacs_event);
190 emacs_tty_handle_magic_event (Lisp_Event *emacs_event)
192 /* Nothing to do currently */
197 emacs_tty_select_process (Lisp_Process *process)
199 event_stream_unixoid_select_process (process);
203 emacs_tty_unselect_process (Lisp_Process *process)
205 event_stream_unixoid_unselect_process (process);
209 emacs_tty_select_console (struct console *con)
211 event_stream_unixoid_select_console (con);
215 emacs_tty_unselect_console (struct console *con)
217 event_stream_unixoid_unselect_console (con);
221 emacs_tty_quit_p (void)
223 /* Nothing to do currently because QUIT is handled through SIGINT.
224 This could change. */
228 emacs_tty_create_stream_pair (void* inhandle, void* outhandle,
229 Lisp_Object* instream, Lisp_Object* outstream, int flags)
231 return event_stream_unixoid_create_stream_pair
232 (inhandle, outhandle, instream, outstream, flags);
236 emacs_tty_delete_stream_pair (Lisp_Object instream, Lisp_Object outstream)
238 return event_stream_unixoid_delete_stream_pair (instream, outstream);
242 /************************************************************************/
244 /************************************************************************/
247 reinit_vars_of_event_tty (void)
249 tty_event_stream = xnew (struct event_stream);
251 tty_event_stream->event_pending_p = emacs_tty_event_pending_p;
252 tty_event_stream->force_event_pending = 0;
253 tty_event_stream->next_event_cb = emacs_tty_next_event;
254 tty_event_stream->handle_magic_event_cb = emacs_tty_handle_magic_event;
255 tty_event_stream->add_timeout_cb = emacs_tty_add_timeout;
256 tty_event_stream->remove_timeout_cb = emacs_tty_remove_timeout;
257 tty_event_stream->select_console_cb = emacs_tty_select_console;
258 tty_event_stream->unselect_console_cb = emacs_tty_unselect_console;
259 tty_event_stream->select_process_cb = emacs_tty_select_process;
260 tty_event_stream->unselect_process_cb = emacs_tty_unselect_process;
261 tty_event_stream->quit_p_cb = emacs_tty_quit_p;
262 tty_event_stream->create_stream_pair_cb = emacs_tty_create_stream_pair;
263 tty_event_stream->delete_stream_pair_cb = emacs_tty_delete_stream_pair;
267 vars_of_event_tty (void)
269 reinit_vars_of_event_tty ();
273 init_event_tty_late (void)
275 event_stream = tty_event_stream;