2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2016, 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"
50 #include "prototypes.h"
53 static time_t update_schedule_anchor;
54 static int update_wanted;
56 static empth_t *update_thread;
58 static int update_get_schedule(void);
59 static void update_sched(void *);
60 static void update_run(void);
67 update_schedule_anchor = (time(NULL) + 59) / 60 * 60;
68 if (update_get_schedule() < 0)
74 update_thread = empth_create(update_sched, 512 * 1024, 0, "Update", dp);
80 * Get the schedule for future updates into update_time[].
81 * Return 0 on success, -1 on failure.
84 update_get_schedule(void)
86 time_t now = time(NULL);
87 int n = sizeof(update_time) / sizeof(*update_time);
90 ef_truncate(EF_UPDATES, 0);
91 ef_extend(EF_UPDATES, n - 1);
92 if (read_schedule(schedulefil, update_time, n,
93 now + 30, update_schedule_anchor) < 0) {
94 logerror("No update schedule!");
95 ef_truncate(EF_UPDATES, 0);
98 logerror("Update schedule read");
99 for (i = 0; update_time[i]; i++) ;
100 ef_truncate(EF_UPDATES, i);
106 update_sched(void *unused)
108 time_t next_update, now;
110 player->proc = empth_self();
116 * Sleep until the next scheduled update or an unscheduled
119 next_update = update_time[0];
121 if (update_window > 0)
122 next_update += roll0(update_window);
123 logerror("Next update at %s", ctime(&next_update));
124 /* sleep until update is scheduled to go off */
125 empth_sleep(next_update);
127 logerror("No update scheduled");
128 /* want to sleep forever, but empthread doesn't provide that */
129 while (empth_sleep(time(NULL) + (60 * 60 * 24)) >= 0) ;
133 if (next_update != 0 && now >= next_update) {
134 /* scheduled update time reached */
135 if (now >= next_update + 60)
136 logerror("Missed the update!");
137 else if (update_demand == UPD_DEMAND_SCHED && !demand_check())
139 else if (updates_disabled())
140 logerror("Updates disabled...skipping update");
143 update_schedule_anchor = update_time[0];
145 /* else unscheduled update if update_wanted is set */
152 update_get_schedule();
158 * Return 0 on success, -1 on failure.
163 logerror("Triggering unscheduled update");
165 empth_wakeup(update_thread);
170 * Reload the update schedule.
171 * Return 0 on success, -1 on failure.
174 update_reschedule(void)
176 empth_wakeup(update_thread);
185 for (p = player_next(NULL); p; p = player_next(p)) {
186 if (p->state != PS_PLAYING)
189 pr_flash(p, "Update aborting command\n");
190 p->may_sleep = PLAYER_SLEEP_NEVER;
192 empth_wakeup(p->proc);
195 empth_rwlock_wrlock(update_lock);
196 if (*pre_update_hook) {
197 if (run_hook(pre_update_hook, "pre-update")) {
198 empth_rwlock_unlock(update_lock);
203 empth_rwlock_unlock(update_lock);
207 run_hook(char *cmd, char *name)
213 status = system(cmd);
215 ; /* successful exit */
216 else if (status == -1)
217 logerror("couldn't execute command processor for %s hook (%s)",
218 name, strerror(errno));
220 else if (WIFEXITED(status))
221 logerror("%s hook terminated unsuccessfully (exit status %d)",
222 name, WEXITSTATUS(status));
223 else if (WIFSIGNALED(status))
224 logerror("%s hook terminated abnormally (signal %d)",
225 name, WTERMSIG(status));
228 logerror("%s hook terminated strangely (status %d)",