+ }
+}
+
+
+void stop_timeout(timeout* t)
+{
+ // if not in the list, it was deleted in callback_timeout_expired
+ if (g_slist_find(timeout_list, t) || g_hash_table_lookup(multi_timeouts, t)) {
+ if (t->multi_timeout)
+ remove_from_multi_timeout((timeout*)t);
+ timeout_list = g_slist_remove(timeout_list, t);
+ free((void*)t);
+ }
+}
+
+
+void add_timeout_intern(int value_msec, int interval_msec, void(*_callback)(), void* arg, timeout *t)
+{
+ t->interval_msec = interval_msec;
+ t->_callback = _callback;
+ t->arg = arg;
+ struct timespec cur_time;
+ clock_gettime(CLOCK_MONOTONIC, &cur_time);
+ t->timeout_expires = add_msec_to_timespec(cur_time, value_msec);
+
+ int can_align = 0;
+ if (interval_msec > 0 && !t->multi_timeout)
+ can_align = align_with_existing_timeouts(t);
+ if (!can_align)
+ timeout_list = g_slist_insert_sorted(timeout_list, t, compare_timeouts);
+}
+
+
+gint compare_timeouts(gconstpointer t1, gconstpointer t2)
+{
+ return compare_timespecs(&((timeout*)t1)->timeout_expires,
+ &((timeout*)t2)->timeout_expires);
+}
+
+
+gint compare_timespecs(const struct timespec* t1, const struct timespec* t2)
+{
+ if (t1->tv_sec < t2->tv_sec)
+ return -1;
+ else if (t1->tv_sec == t2->tv_sec) {
+ if (t1->tv_nsec < t2->tv_nsec)
+ return -1;
+ else if (t1->tv_nsec == t2->tv_nsec)
+ return 0;
+ else
+ return 1;
+ }
+ else
+ return 1;
+}
+
+int timespec_subtract(struct timespec* result, struct timespec* x, struct timespec* y)
+{
+ /* Perform the carry for the later subtraction by updating y. */
+ if (x->tv_nsec < y->tv_nsec) {
+ int nsec = (y->tv_nsec - x->tv_nsec) / 1000000000 + 1;
+ y->tv_nsec -= 1000000000 * nsec;
+ y->tv_sec += nsec;
+ }
+ if (x->tv_nsec - y->tv_nsec > 1000000000) {
+ int nsec = (x->tv_nsec - y->tv_nsec) / 1000000000;
+ y->tv_nsec += 1000000000 * nsec;
+ y->tv_sec -= nsec;
+ }
+
+ /* Compute the time remaining to wait. tv_nsec is certainly positive. */
+ result->tv_sec = x->tv_sec - y->tv_sec;
+ result->tv_nsec = x->tv_nsec - y->tv_nsec;
+
+ /* Return 1 if result is negative. */
+ return x->tv_sec < y->tv_sec;
+}
+
+
+struct timespec add_msec_to_timespec(struct timespec ts, int msec)
+{
+ ts.tv_sec += msec / 1000;
+ ts.tv_nsec += (msec % 1000)*1000000;
+ if (ts.tv_nsec >= 1000000000) { // 10^9
+ ts.tv_sec++;
+ ts.tv_nsec -= 1000000000;
+ }
+ return ts;
+}
+
+
+int align_with_existing_timeouts(timeout *t)
+{
+ GSList* it = timeout_list;
+ while (it) {
+ timeout* t2 = it->data;
+ if (t2->interval_msec > 0) {
+ if (t->interval_msec % t2->interval_msec == 0 || t2->interval_msec % t->interval_msec == 0) {
+ if (multi_timeouts == 0)
+ multi_timeouts = g_hash_table_new(0, 0);
+ if (!t->multi_timeout && !t2->multi_timeout)
+ // both timeouts can be aligned, but there is no multi timeout for them
+ create_multi_timeout(t, t2);
+ else
+ // there is already a multi timeout, so we append the new timeout to the multi timeout
+ append_multi_timeout(t, t2);
+ return 1;
+ }
+ }
+ it = it->next;
+ }
+ return 0;
+}
+
+
+int calc_multi_timeout_interval(multi_timeout_handler* mth)
+{
+ GSList* it = mth->timeout_list;
+ timeout* t = it->data;
+ int min_interval = t->interval_msec;
+ it = it->next;
+ while (it) {
+ t = it->data;
+ if (t->interval_msec < min_interval)
+ min_interval = t->interval_msec;
+ it = it->next;
+ }
+ return min_interval;
+}
+
+
+void create_multi_timeout(timeout* t1, timeout* t2)
+{
+ multi_timeout* mt1 = malloc(sizeof(multi_timeout));
+ multi_timeout* mt2 = malloc(sizeof(multi_timeout));
+ multi_timeout_handler* mth = malloc(sizeof(multi_timeout_handler));
+ timeout* real_timeout = malloc(sizeof(timeout));
+
+ mth->timeout_list = 0;
+ mth->timeout_list = g_slist_prepend(mth->timeout_list, t1);
+ mth->timeout_list = g_slist_prepend(mth->timeout_list, t2);
+ mth->parent_timeout = real_timeout;
+
+ g_hash_table_insert(multi_timeouts, t1, mth);
+ g_hash_table_insert(multi_timeouts, t2, mth);
+ g_hash_table_insert(multi_timeouts, real_timeout, mth);
+
+ t1->multi_timeout = mt1;
+ t2->multi_timeout = mt2;
+ // set real_timeout->multi_timeout to something, such that we see in add_timeout_intern that
+ // it is already a multi_timeout (we never use it, except of checking for 0 ptr)
+ real_timeout->multi_timeout = (void*)real_timeout;
+
+ timeout_list = g_slist_remove(timeout_list, t1);
+ timeout_list = g_slist_remove(timeout_list, t2);
+
+ update_multi_timeout_values(mth);
+}
+
+
+void append_multi_timeout(timeout* t1, timeout* t2)
+{
+ if (t2->multi_timeout) {
+ // swap t1 and t2 such that t1 is the multi timeout
+ timeout* tmp = t2;
+ t2 = t1;
+ t1 = tmp;
+ }
+
+ multi_timeout* mt = malloc(sizeof(multi_timeout));
+ multi_timeout_handler* mth = g_hash_table_lookup(multi_timeouts, t1);
+
+ mth->timeout_list = g_slist_prepend(mth->timeout_list, t2);
+ g_hash_table_insert(multi_timeouts, t2, mth);
+
+ t2->multi_timeout = mt;
+
+ update_multi_timeout_values(mth);
+}
+
+
+void update_multi_timeout_values(multi_timeout_handler* mth)
+{
+ int interval = calc_multi_timeout_interval(mth);
+ int next_timeout_msec = interval;
+
+ struct timespec cur_time;
+ clock_gettime(CLOCK_MONOTONIC, &cur_time);
+
+ GSList* it = mth->timeout_list;
+ struct timespec diff_time;
+ while (it) {
+ timeout* t = it->data;
+ t->multi_timeout->count_to_expiration = t->interval_msec / interval;
+ timespec_subtract(&diff_time, &t->timeout_expires, &cur_time);
+ int msec_to_expiration = diff_time.tv_sec*1000 + diff_time.tv_nsec/1000000;
+ int count_left = msec_to_expiration / interval + (msec_to_expiration%interval != 0);
+ t->multi_timeout->current_count = t->multi_timeout->count_to_expiration - count_left;
+ if (msec_to_expiration < next_timeout_msec)
+ next_timeout_msec = msec_to_expiration;
+ it = it->next;
+ }
+
+ mth->parent_timeout->interval_msec = interval;
+ timeout_list = g_slist_remove(timeout_list, mth->parent_timeout);
+ add_timeout_intern(next_timeout_msec, interval, callback_multi_timeout, mth, mth->parent_timeout);
+}
+
+
+void callback_multi_timeout(void* arg)
+{
+ multi_timeout_handler* mth = arg;
+ struct timespec cur_time;
+ clock_gettime(CLOCK_MONOTONIC, &cur_time);
+ GSList* it = mth->timeout_list;
+ while (it) {
+ timeout* t = it->data;
+ if (++t->multi_timeout->current_count >= t->multi_timeout->count_to_expiration) {
+ t->_callback(t->arg);
+ t->multi_timeout->current_count = 0;
+ t->timeout_expires = add_msec_to_timespec(cur_time, t->interval_msec);