2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2017, 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, 2007-2012
44 #include "empthread.h"
49 #include "prototypes.h"
52 static time_t update_schedule_anchor;
53 static int update_wanted;
55 static empth_t *update_thread;
57 static int update_get_schedule(void);
58 static void update_sched(void *);
59 static void update_run(void);
66 update_schedule_anchor = (time(NULL) + 59) / 60 * 60;
67 if (update_get_schedule() < 0)
73 update_thread = empth_create(update_sched, 512 * 1024, 0, "Update", dp);
79 * Get the schedule for future updates into update_time[].
80 * Return 0 on success, -1 on failure.
83 update_get_schedule(void)
85 time_t now = time(NULL);
86 int n = sizeof(update_time) / sizeof(*update_time);
89 ef_truncate(EF_UPDATES, 0);
90 ef_extend(EF_UPDATES, n - 1);
91 if (read_schedule(schedulefil, update_time, n,
92 now + 30, update_schedule_anchor) < 0) {
93 logerror("No update schedule!");
94 ef_truncate(EF_UPDATES, 0);
97 logerror("Update schedule read");
98 for (i = 0; update_time[i]; i++) ;
99 ef_truncate(EF_UPDATES, i);
105 update_sched(void *unused)
107 time_t next_update, now;
109 player->proc = empth_self();
115 * Sleep until the next scheduled update or an unscheduled
118 next_update = update_time[0];
120 if (update_window > 0)
121 next_update += roll0(update_window);
122 logerror("Next update at %s", ctime(&next_update));
123 /* sleep until update is scheduled to go off */
124 empth_sleep(next_update);
126 logerror("No update scheduled");
127 /* want to sleep forever, but empthread doesn't provide that */
128 while (empth_sleep(time(NULL) + (60 * 60 * 24)) >= 0) ;
132 if (next_update != 0 && now >= next_update) {
133 /* scheduled update time reached */
134 if (now >= next_update + 60)
135 logerror("Missed the update!");
136 else if (update_demand == UPD_DEMAND_SCHED && !demand_check())
138 else if (updates_disabled())
139 logerror("Updates disabled...skipping update");
142 update_schedule_anchor = update_time[0];
144 /* else unscheduled update if update_wanted is set */
151 update_get_schedule();
157 * Return 0 on success, -1 on failure.
162 logerror("Triggering unscheduled update");
164 empth_wakeup(update_thread);
169 * Reload the update schedule.
170 * Return 0 on success, -1 on failure.
173 update_reschedule(void)
175 empth_wakeup(update_thread);
184 for (p = player_next(NULL); p; p = player_next(p)) {
185 if (p->state != PS_PLAYING)
188 pr_flash(p, "Update aborting command\n");
189 p->may_sleep = PLAYER_SLEEP_NEVER;
191 empth_wakeup(p->proc);
194 empth_rwlock_wrlock(update_lock);
195 if (*pre_update_hook) {
196 if (run_hook(pre_update_hook, "pre-update")) {
197 empth_rwlock_unlock(update_lock);
202 empth_rwlock_unlock(update_lock);
206 run_hook(char *cmd, char *name)
212 status = system(cmd);
214 ; /* successful exit */
215 else if (status == -1)
216 logerror("couldn't execute command processor for %s hook (%s)",
217 name, strerror(errno));
219 else if (WIFEXITED(status))
220 logerror("%s hook terminated unsuccessfully (exit status %d)",
221 name, WEXITSTATUS(status));
222 else if (WIFSIGNALED(status))
223 logerror("%s hook terminated abnormally (signal %d)",
224 name, WTERMSIG(status));
227 logerror("%s hook terminated strangely (status %d)",