avl_tree_t *event_tree;
extern time_t now;
-int id;
+static int id;
-static int event_compare(const event_t *a, const event_t *b)
-{
- if(a->time > b->time)
+static int event_compare(const event_t *a, const event_t *b) {
+ if(a->time > b->time) {
return 1;
+ }
- if(a->time < b->time)
+ if(a->time < b->time) {
return -1;
+ }
return a->id - b->id;
}
-void init_events(void)
-{
- cp();
-
+void init_events(void) {
event_tree = avl_alloc_tree((avl_compare_t) event_compare, (avl_action_t) free_event);
}
-void exit_events(void)
-{
- cp();
-
+void exit_events(void) {
avl_delete_tree(event_tree);
}
-void expire_events(void)
-{
+void expire_events(void) {
avl_node_t *node;
event_t *event;
time_t diff;
/*
* Make all events appear expired by substracting the difference between
- * the expiration time of the last event and the current time.
+ * the expiration time of the last event and the current time.
*/
- cp();
-
- if(!event_tree->tail)
+ if(!event_tree->tail) {
return;
+ }
event = event_tree->tail->data;
- if(event->time < now)
+
+ if(event->time <= now) {
return;
+ }
+
+ diff = event->time - now;
- diff = 1 + event->time - now;
-
for(node = event_tree->head; node; node = node->next) {
event = node->data;
event->time -= diff;
}
}
-event_t *new_event(void)
-{
- cp();
-
+event_t *new_event(void) {
return xmalloc_and_zero(sizeof(event_t));
}
-void free_event(event_t *event)
-{
- cp();
-
+void free_event(event_t *event) {
free(event);
}
-void event_add(event_t *event)
-{
- cp();
-
+void event_add(event_t *event) {
event->id = ++id;
avl_insert(event_tree, event);
}
-void event_del(event_t *event)
-{
- cp();
-
+void event_del(event_t *event) {
avl_delete(event_tree, event);
}
-event_t *get_expired_event(void)
-{
+event_t *get_expired_event(void) {
event_t *event;
- cp();
-
if(event_tree->head) {
event = event_tree->head->data;
- if(event->time < now) {
+ if(event->time <= now) {
avl_node_t *node = event_tree->head;
avl_unlink_node(event_tree, node);
free(node);
return NULL;
}
+
+event_t *peek_next_event(void) {
+ if(event_tree->head) {
+ return event_tree->head->data;
+ }
+
+ return NULL;
+}