2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2006, 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
46 #include "empthread.h"
47 #include "prototypes.h"
51 empth_sem_t *update_sem;
54 static void update_wait(void *unused);
55 static int run_hook(char *cmd, char *name);
59 update_sched(void *unused)
64 update_sem = empth_sem_create("Update", 0);
65 empth_create(PP_SCHED, update_wait, (50 * 1024), 0, "UpdateWait",
66 "Waits until players idle", 0);
69 logerror("bad value for s_p_etu (%d)", s_p_etu);
71 logerror("setting s_p_etu to %d", s_p_etu);
75 next_update_time(&now, &update_time, &delta);
76 if (update_window > 0) {
77 wind = (random() % update_window);
81 logerror("Next update at %s", ctime(&update_time));
82 logerror("Next update in %ld seconds", (long)delta);
83 /* sleep until update is scheduled to go off */
84 empth_sleep(update_time);
87 if (!gamehours(now)) {
88 logerror("No update permitted (hours restriction)");
91 if (!updatetime(&now)) {
92 logerror("No update wanted");
95 if (updates_disabled()) {
96 logerror("Updates disabled...skipping update");
99 empth_sem_signal(update_sem);
105 update_force(void *seconds)
110 empth_sleep(now + *(int *)seconds);
111 empth_sem_signal(update_sem);
117 update_wait(void *unused)
126 empth_sem_wait(update_sem);
129 for (p = player_next(0); p != 0; p = player_next(p)) {
130 if (p->state != PS_PLAYING)
133 pr_flash(p, "Update aborting command\n");
135 empth_wakeup(p->proc);
141 /* sleep a few, wait for aborts to take effect */
142 empth_sleep(now + 2);
144 if (*pre_update_hook) {
145 if (run_hook(pre_update_hook, "pre-update")) {
151 * we rely on the fact that update's priority is the highest
152 * in the land so it can finish before it yields.
156 logerror("can't create dummy player for update");
161 /* finish_sects */ WORLD_X * WORLD_Y * (2 * sizeof(double) +
164 empth_create(PP_UPDATE, update_main, stacksize, 0,
165 "UpdateRun", "Updates the world", dp);
171 run_hook(char *cmd, char *name)
177 status = system(cmd);
179 ; /* successful exit */
180 else if (status == -1)
181 logerror("couldn't execute command processor for %s hook (%s)",
182 name, strerror(errno));
184 else if (WIFEXITED(status))
185 logerror("%s hook terminated unsuccessfully (exit status %d)",
186 name, WEXITSTATUS(status));
187 else if (WIFSIGNALED(status))
188 logerror("%s hook terminated abnormally (signal %d)",
189 name, WTERMSIG(status));
192 logerror("%s hook terminated strangely (status %d)",