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();
45 extern void update_wait();
54 extern int etu_per_update;
55 extern int adj_update;
56 extern int update_window;
62 update_sem = empth_sem_create("Update", 0);
63 empth_create(PP_SCHED, update_wait, (50 * 1024), 0, "UpdateWait",
64 "Waits until players idle", 0);
66 (void)gamehours(now, hour);
67 if (NULL != (kw = kw_find("s_p_etu")))
68 kw_parse(CF_VALUE, kw, &s_p_etu);
69 if (NULL != (kw = kw_find("etu_per_update")))
70 kw_parse(CF_VALUE, kw, &etu_per_update);
71 if (NULL != (kw = kw_find("adj_update")))
72 kw_parse(CF_VALUE, kw, &adj_update);
73 if (NULL != (kw = kw_find("update_window")))
74 kw_parse(CF_VALUE, kw, &update_window);
76 logerror("bad value for s_p_etu (%d)", s_p_etu);
78 logerror("setting s_p_etu to %d", s_p_etu);
82 next_update_time(&now, &update_time, &delta);
83 if (update_window > 0) {
84 wind = (random() % update_window);
88 logerror("Next update at %s", ctime(&update_time));
89 logerror("Next update in %d seconds", delta);
90 /* sleep until update is scheduled to go off */
91 empth_sleep(update_time);
94 if (!gamehours(now, hour)) {
95 logerror("No update permitted (hours restriction)");
98 if (!updatetime(&now)) {
99 logerror("No update wanted");
102 if (updates_disabled()) {
103 logerror("Updates disabled...skipping update");
106 empth_sem_signal(update_sem);
123 empth_sem_wait(update_sem);
125 for (p = player_next(0); p != 0; p = player_next(p)) {
126 if (p->state != PS_PLAYING)
129 pr_flash(p, "Update aborting command\n");
131 empth_wakeup(p->proc);
137 /* sleep a few, wait for aborts to take effect */
138 empth_sleep(now + 2);
141 * we rely on the fact that update's priority is the highest
142 * in the land so it can finish before it yields.
144 dp = player_new(0, 0);
146 /* finish_sects */ WORLD_X * WORLD_Y * (2 * sizeof(double) +
149 empth_create(PP_UPDATE, update_main, stacksize, 0,
150 "UpdateRun", "Updates the world", dp);