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;
53 static void update_wait(void *unused);
54 static int run_hook(char *cmd, char *name);
58 update_sched(void *unused)
63 update_sem = empth_sem_create("Update", 0);
64 empth_create(PP_SCHED, update_wait, (50 * 1024), 0, "UpdateWait",
65 "Waits until players idle", 0);
68 logerror("bad value for s_p_etu (%d)", s_p_etu);
70 logerror("setting s_p_etu to %d", s_p_etu);
74 next_update_time(&now, &update_time, &delta);
75 if (update_window > 0) {
76 wind = (random() % update_window);
80 logerror("Next update at %s", ctime(&update_time));
81 logerror("Next update in %ld seconds", (long)delta);
82 /* sleep until update is scheduled to go off */
83 empth_sleep(update_time);
86 if (!gamehours(now)) {
87 logerror("No update permitted (hours restriction)");
90 if (!updatetime(&now)) {
91 logerror("No update wanted");
94 if (updates_disabled()) {
95 logerror("Updates disabled...skipping update");
98 empth_sem_signal(update_sem);
104 update_force(void *seconds)
109 empth_sleep(now + *(int *)seconds);
110 empth_sem_signal(update_sem);
116 update_wait(void *unused)
125 empth_sem_wait(update_sem);
128 for (p = player_next(0); p != 0; p = player_next(p)) {
129 if (p->state != PS_PLAYING)
132 pr_flash(p, "Update aborting command\n");
134 empth_wakeup(p->proc);
140 /* sleep a few, wait for aborts to take effect */
141 empth_sleep(now + 2);
143 if (*pre_update_hook) {
144 if (run_hook(pre_update_hook, "pre-update")) {
150 * we rely on the fact that update's priority is the highest
151 * in the land so it can finish before it yields.
155 logerror("can't create dummy player for update");
160 /* finish_sects */ WORLD_X * WORLD_Y * (2 * sizeof(double) +
163 empth_create(PP_UPDATE, update_main, stacksize, 0,
164 "UpdateRun", "Updates the world", dp);
170 run_hook(char *cmd, char *name)
176 status = system(cmd);
178 ; /* successful exit */
179 else if (status == -1)
180 logerror("couldn't execute command processor for %s hook (%s)",
181 name, strerror(errno));
183 else if (WIFEXITED(status))
184 logerror("%s hook terminated unsuccessfully (exit status %d)",
185 name, WEXITSTATUS(status));
186 else if (WIFSIGNALED(status))
187 logerror("%s hook terminated abnormally (signal %d)",
188 name, WTERMSIG(status));
191 logerror("%s hook terminated strangely (status %d)",