diff options
Diffstat (limited to 'libosmocore/src/timer.c')
| -rw-r--r-- | libosmocore/src/timer.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/libosmocore/src/timer.c b/libosmocore/src/timer.c deleted file mode 100644 index 37d7d166b..000000000 --- a/libosmocore/src/timer.c +++ /dev/null @@ -1,185 +0,0 @@ -/* - * (C) 2008,2009 by Holger Hans Peter Freyther <zecke@selfish.org> - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - */ - -#include <assert.h> -#include <string.h> -#include <osmocore/timer.h> - -static LLIST_HEAD(timer_list); -static struct timeval s_nearest_time; -static struct timeval s_select_time; - -#define MICRO_SECONDS 1000000LL - -#define TIME_SMALLER(left, right) \ - (left.tv_sec*MICRO_SECONDS+left.tv_usec) <= (right.tv_sec*MICRO_SECONDS+right.tv_usec) - -void bsc_add_timer(struct timer_list *timer) -{ - struct timer_list *list_timer; - - /* TODO: Optimize and remember the closest item... */ - timer->active = 1; - - /* this might be called from within update_timers */ - llist_for_each_entry(list_timer, &timer_list, entry) - if (timer == list_timer) - return; - - timer->in_list = 1; - llist_add(&timer->entry, &timer_list); -} - -void bsc_schedule_timer(struct timer_list *timer, int seconds, int microseconds) -{ - struct timeval current_time; - - gettimeofday(¤t_time, NULL); - unsigned long long currentTime = current_time.tv_sec * MICRO_SECONDS + current_time.tv_usec; - currentTime += seconds * MICRO_SECONDS + microseconds; - timer->timeout.tv_sec = currentTime / MICRO_SECONDS; - timer->timeout.tv_usec = currentTime % MICRO_SECONDS; - bsc_add_timer(timer); -} - -void bsc_del_timer(struct timer_list *timer) -{ - if (timer->in_list) { - timer->active = 0; - timer->in_list = 0; - llist_del(&timer->entry); - } -} - -int bsc_timer_pending(struct timer_list *timer) -{ - return timer->active; -} - -/* - * if we have a nearest time return the delta between the current - * time and the time of the nearest timer. - * If the nearest timer timed out return NULL and then we will - * dispatch everything after the select - */ -struct timeval *bsc_nearest_timer() -{ - struct timeval current_time; - - if (s_nearest_time.tv_sec == 0 && s_nearest_time.tv_usec == 0) - return NULL; - - if (gettimeofday(¤t_time, NULL) == -1) - return NULL; - - unsigned long long nearestTime = s_nearest_time.tv_sec * MICRO_SECONDS + s_nearest_time.tv_usec; - unsigned long long currentTime = current_time.tv_sec * MICRO_SECONDS + current_time.tv_usec; - - if (nearestTime < currentTime) { - s_select_time.tv_sec = 0; - s_select_time.tv_usec = 0; - } else { - s_select_time.tv_sec = (nearestTime - currentTime) / MICRO_SECONDS; - s_select_time.tv_usec = (nearestTime - currentTime) % MICRO_SECONDS; - } - - return &s_select_time; -} - -/* - * Find the nearest time and update s_nearest_time - */ -void bsc_prepare_timers() -{ - struct timer_list *timer, *nearest_timer = NULL; - llist_for_each_entry(timer, &timer_list, entry) { - if (!nearest_timer || TIME_SMALLER(timer->timeout, nearest_timer->timeout)) { - nearest_timer = timer; - } - } - - if (nearest_timer) { - s_nearest_time = nearest_timer->timeout; - } else { - memset(&s_nearest_time, 0, sizeof(struct timeval)); - } -} - -/* - * fire all timers... and remove them - */ -int bsc_update_timers() -{ - struct timeval current_time; - struct timer_list *timer, *tmp; - int work = 0; - - gettimeofday(¤t_time, NULL); - - /* - * The callbacks might mess with our list and in this case - * even llist_for_each_entry_safe is not safe to use. To allow - * del_timer, add_timer, schedule_timer to be called from within - * the callback we jump through some loops. - * - * First we set the handled flag of each active timer to zero, - * then we iterate over the list and execute the callbacks. As the - * list might have been changed (specially the next) from within - * the callback we have to start over again. Once every callback - * is dispatched we will remove the non-active from the list. - * - * TODO: If this is a performance issue we can poison a global - * variable in add_timer and del_timer and only then restart. - */ - llist_for_each_entry(timer, &timer_list, entry) { - timer->handled = 0; - } - -restart: - llist_for_each_entry(timer, &timer_list, entry) { - if (!timer->handled && TIME_SMALLER(timer->timeout, current_time)) { - timer->handled = 1; - timer->active = 0; - (*timer->cb)(timer->data); - work = 1; - goto restart; - } - } - - llist_for_each_entry_safe(timer, tmp, &timer_list, entry) { - timer->handled = 0; - if (!timer->active) { - bsc_del_timer(timer); - } - } - - return work; -} - -int bsc_timer_check(void) -{ - struct timer_list *timer; - int i = 0; - - llist_for_each_entry(timer, &timer_list, entry) { - i++; - } - return i; -} |