2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2011, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire 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 3 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, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * update.c: Update scheduler
29 * Known contributors to this file:
32 * Ron Koenderink, 2005
33 * Markus Armbruster, 2007-2010
43 #include "empthread.h"
49 #include "prototypes.h"
54 * Can be used to suppress messages, or direct them to bulletins.
58 static time_t update_schedule_anchor;
59 static int update_wanted;
61 static empth_t *update_thread;
63 static int update_get_schedule(void);
64 static void update_sched(void *);
65 static void update_run(void);
73 update_schedule_anchor = (time(NULL) + 59) / 60 * 60;
74 if (update_get_schedule() < 0)
80 /* FIXME ancient black magic; figure out true stack need */
82 /* finish_sects */ WORLD_X * WORLD_Y * (2 * sizeof(double) +
84 update_thread = empth_create(update_sched, stacksize, 0, "Update", dp);
90 * Get the schedule for future updates into update_time[].
91 * Return 0 on success, -1 on failure.
94 update_get_schedule(void)
96 time_t now = time(NULL);
97 int n = sizeof(update_time) / sizeof(*update_time);
100 ef_truncate(EF_UPDATES, 0);
101 ef_extend(EF_UPDATES, n - 1);
102 if (read_schedule(schedulefil, update_time, n,
103 now + 30, update_schedule_anchor) < 0) {
104 logerror("No update schedule!");
105 ef_truncate(EF_UPDATES, 0);
108 logerror("Update schedule read");
109 for (i = 0; update_time[i]; i++) ;
110 ef_truncate(EF_UPDATES, i);
116 update_sched(void *unused)
118 time_t next_update, now;
120 player->proc = empth_self();
126 * Sleep until the next scheduled update or an unscheduled
129 next_update = update_time[0];
131 if (update_window > 0)
132 next_update += random() % update_window;
133 logerror("Next update at %s", ctime(&next_update));
134 /* sleep until update is scheduled to go off */
135 empth_sleep(next_update);
137 logerror("No update scheduled");
138 /* want to sleep forever, but empthread doesn't provide that */
139 while (empth_sleep(time(NULL) + (60 * 60 * 24)) >= 0) ;
143 if (next_update != 0 && now >= next_update) {
144 /* scheduled update time reached */
145 if (now >= next_update + 60)
146 logerror("Missed the update!");
147 else if (update_demand == UPD_DEMAND_SCHED && !demand_check())
149 else if (updates_disabled())
150 logerror("Updates disabled...skipping update");
153 update_schedule_anchor = update_time[0];
155 /* else unscheduled update if update_wanted is set */
162 update_get_schedule();
169 * Return 0 on success, -1 on failure.
174 logerror("Triggering unscheduled update");
176 empth_wakeup(update_thread);
181 * Reload the update schedule.
182 * Return 0 on success, -1 on failure.
185 update_reschedule(void)
187 empth_wakeup(update_thread);
196 for (p = player_next(NULL); p; p = player_next(p)) {
197 if (p->state != PS_PLAYING)
200 pr_flash(p, "Update aborting command\n");
201 p->may_sleep = PLAYER_SLEEP_NEVER;
203 empth_wakeup(p->proc);
206 empth_rwlock_wrlock(update_lock);
207 if (*pre_update_hook) {
208 if (run_hook(pre_update_hook, "pre-update")) {
209 empth_rwlock_unlock(update_lock);
216 empth_rwlock_unlock(update_lock);
220 run_hook(char *cmd, char *name)
226 status = system(cmd);
228 ; /* successful exit */
229 else if (status == -1)
230 logerror("couldn't execute command processor for %s hook (%s)",
231 name, strerror(errno));
233 else if (WIFEXITED(status))
234 logerror("%s hook terminated unsuccessfully (exit status %d)",
235 name, WEXITSTATUS(status));
236 else if (WIFSIGNALED(status))
237 logerror("%s hook terminated abnormally (signal %d)",
238 name, WTERMSIG(status));
241 logerror("%s hook terminated strangely (status %d)",