2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2007, 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 files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * update.c: Update scheduler
30 * Known contributors to this file:
33 * Ron Koenderink, 2005
43 #include "empthread.h"
47 #include "prototypes.h"
50 empth_sem_t *update_sem;
51 empth_rwlock_t *update_lock;
55 static void update_sched(void *);
56 static void update_wait(void *unused);
57 static int run_hook(char *cmd, char *name);
65 update_sem = empth_sem_create("Update", 0);
66 update_lock = empth_rwlock_create("Update");
67 if (!update_sem || !update_lock)
73 /* FIXME ancient black magic; figure out true stack need */
75 /* finish_sects */ WORLD_X * WORLD_Y * (2 * sizeof(double) +
77 if (!empth_create(PP_UPDATE, update_wait, stacksize, 0,
78 "Update", "Updates the world", dp))
81 if (!empth_create(PP_SCHED, update_sched, 50 * 1024, 0,
82 "UpdateSched", "Schedules updates to occur", NULL))
88 update_sched(void *unused)
94 logerror("bad value for s_p_etu (%d)", s_p_etu);
96 logerror("setting s_p_etu to %d", s_p_etu);
100 next_update_time(&now, &update_time, &delta);
101 if (update_window > 0) {
102 wind = (random() % update_window);
106 logerror("Next update at %s", ctime(&update_time));
107 logerror("Next update in %ld seconds", (long)delta);
108 /* sleep until update is scheduled to go off */
109 empth_sleep(update_time);
112 if (!gamehours(now)) {
113 logerror("No update permitted (hours restriction)");
116 if (!updatetime(&now)) {
117 logerror("No update wanted");
120 if (updates_disabled()) {
121 logerror("Updates disabled...skipping update");
124 empth_sem_signal(update_sem);
130 update_force(void *seconds)
135 empth_sleep(now + *(int *)seconds);
136 empth_sem_signal(update_sem);
142 update_wait(void *unused)
146 player->proc = empth_self();
151 empth_sem_wait(update_sem);
153 for (p = player_next(0); p != 0; p = player_next(p)) {
154 if (p->state != PS_PLAYING)
157 pr_flash(p, "Update aborting command\n");
159 empth_wakeup(p->proc);
162 empth_rwlock_wrlock(update_lock);
163 if (*pre_update_hook) {
164 if (run_hook(pre_update_hook, "pre-update")) {
166 empth_rwlock_unlock(update_lock);
172 empth_rwlock_unlock(update_lock);
178 run_hook(char *cmd, char *name)
184 status = system(cmd);
186 ; /* successful exit */
187 else if (status == -1)
188 logerror("couldn't execute command processor for %s hook (%s)",
189 name, strerror(errno));
191 else if (WIFEXITED(status))
192 logerror("%s hook terminated unsuccessfully (exit status %d)",
193 name, WEXITSTATUS(status));
194 else if (WIFSIGNALED(status))
195 logerror("%s hook terminated abnormally (signal %d)",
196 name, WTERMSIG(status));
199 logerror("%s hook terminated strangely (status %d)",