2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
23 * related information and legal notices. It is expected that any future
24 * projects/authors will amend these files as needed.
28 * update.c: Update scheduler
30 * Known contributors to this file:
38 #include "empthread.h"
39 #include "prototypes.h"
42 empth_sem_t *update_sem;
44 extern void update_main(void *);
45 static void update_wait(void *argv);
50 update_sched(void *argv)
57 update_sem = empth_sem_create("Update", 0);
58 empth_create(PP_SCHED, update_wait, (50 * 1024), 0, "UpdateWait",
59 "Waits until players idle", 0);
61 (void)gamehours(now, hour);
62 if (NULL != (kw = kw_find("s_p_etu")))
63 kw_parse(CF_VALUE, kw, &s_p_etu);
64 if (NULL != (kw = kw_find("etu_per_update")))
65 kw_parse(CF_VALUE, kw, &etu_per_update);
66 if (NULL != (kw = kw_find("adj_update")))
67 kw_parse(CF_VALUE, kw, &adj_update);
68 if (NULL != (kw = kw_find("update_window")))
69 kw_parse(CF_VALUE, kw, &update_window);
71 logerror("bad value for s_p_etu (%d)", s_p_etu);
73 logerror("setting s_p_etu to %d", s_p_etu);
77 next_update_time(&now, &update_time, &delta);
78 if (update_window > 0) {
79 wind = (random() % update_window);
83 logerror("Next update at %s", ctime(&update_time));
84 logerror("Next update in %d seconds", delta);
85 /* sleep until update is scheduled to go off */
86 empth_sleep(update_time);
89 if (!gamehours(now, hour)) {
90 logerror("No update permitted (hours restriction)");
93 if (!updatetime(&now)) {
94 logerror("No update wanted");
97 if (updates_disabled()) {
98 logerror("Updates disabled...skipping update");
101 empth_sem_signal(update_sem);
108 update_wait(void *argv)
117 empth_sem_wait(update_sem);
119 for (p = player_next(0); p != 0; p = player_next(p)) {
120 if (p->state != PS_PLAYING)
123 pr_flash(p, "Update aborting command\n");
125 empth_wakeup(p->proc);
131 /* sleep a few, wait for aborts to take effect */
132 empth_sleep(now + 2);
135 * we rely on the fact that update's priority is the highest
136 * in the land so it can finish before it yields.
138 dp = player_new(0, 0);
140 logerror("can't create dummy player for update");
144 /* finish_sects */ WORLD_X * WORLD_Y * (2 * sizeof(double) +
147 empth_create(PP_UPDATE, update_main, stacksize, 0,
148 "UpdateRun", "Updates the world", dp);