2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2005, 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:
42 #include "empthread.h"
43 #include "prototypes.h"
47 empth_sem_t *update_sem;
50 static void update_wait(void *unused);
51 static int run_hook(char *cmd, char *name);
55 update_sched(void *unused)
60 update_sem = empth_sem_create("Update", 0);
61 empth_create(PP_SCHED, update_wait, (50 * 1024), 0, "UpdateWait",
62 "Waits until players idle", 0);
65 logerror("bad value for s_p_etu (%d)", s_p_etu);
67 logerror("setting s_p_etu to %d", s_p_etu);
71 next_update_time(&now, &update_time, &delta);
72 if (update_window > 0) {
73 wind = (random() % update_window);
77 logerror("Next update at %s", ctime(&update_time));
78 logerror("Next update in %ld seconds", (long)delta);
79 /* sleep until update is scheduled to go off */
80 empth_sleep(update_time);
83 if (!gamehours(now)) {
84 logerror("No update permitted (hours restriction)");
87 if (!updatetime(&now)) {
88 logerror("No update wanted");
91 if (updates_disabled()) {
92 logerror("Updates disabled...skipping update");
95 empth_sem_signal(update_sem);
101 update_force(void *seconds)
106 empth_sleep(now + *(int *)seconds);
107 empth_sem_signal(update_sem);
113 update_wait(void *unused)
122 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);
140 if (*pre_update_hook) {
141 if (run_hook(pre_update_hook, "pre-update")) {
147 * we rely on the fact that update's priority is the highest
148 * in the land so it can finish before it yields.
152 logerror("can't create dummy player for update");
157 /* finish_sects */ WORLD_X * WORLD_Y * (2 * sizeof(double) +
160 empth_create(PP_UPDATE, update_main, stacksize, 0,
161 "UpdateRun", "Updates the world", dp);
167 run_hook(char *cmd, char *name)
173 status = system(cmd);
175 ; /* successful exit */
176 else if (status == -1)
177 logerror("couldn't execute command processor for %s hook (%s)",
178 name, strerror(errno));
180 else if (WIFEXITED(status))
181 logerror("%s hook terminated unsuccessfully (exit status %d)",
182 name, WEXITSTATUS(status));
183 else if (WIFSIGNALED(status))
184 logerror("%s hook terminated abnormally (signal %d)",
185 name, WTERMSIG(status));
188 logerror("%s hook terminated strangely (status %d)",