void _dump_stats_to_queue(stats_event_t **queue)
{
avl_node *node;
avl_node *node2;
stats_event_t *event;
stats_source_t *source;
thread_mutex_lock(&_stats_mutex);
/* first we fill our queue with the current stats */
/* start with the global stats */
node = avl_get_first(_stats.global_tree);
while (node) {
event = _make_event_from_node((stats_node_t *)node->key, NULL);
_add_event_to_queue(event, queue);
node = avl_get_next(node);
}
/* now the stats for each source */
node = avl_get_first(_stats.source_tree);
while (node) {
source = (stats_source_t *)node->key;
node2 = avl_get_first(source->stats_tree);
while (node2) {
event = _make_event_from_node((stats_node_t *)node2->key, source->source);
_add_event_to_queue(event, queue);
node2 = avl_get_next(node2);
}
node = avl_get_next(node);
}
thread_mutex_unlock(&_stats_mutex);
}
/* factoring out code for stats loops
** this function copies all stats to queue, and registers
** the queue for all new events atomically.
** note: mutex must already be created!
*/
static void _register_listener (event_listener_t *listener)
{
avl_node *node;
avl_node *node2;
stats_event_t *event;
stats_source_t *source;
thread_mutex_lock(&_stats_mutex);
/* first we fill our queue with the current stats */
/* start with the global stats */
node = avl_get_first(_stats.global_tree);
while (node) {
event = _make_event_from_node((stats_node_t *) node->key, NULL);
_add_event_to_queue(event, &listener->queue);
node = avl_get_next(node);
}
/* now the stats for each source */
node = avl_get_first(_stats.source_tree);
while (node) {
source = (stats_source_t *)node->key;
node2 = avl_get_first(source->stats_tree);
while (node2) {
event = _make_event_from_node((stats_node_t *)node2->key, source->source);
_add_event_to_queue (event, &listener->queue);
node2 = avl_get_next(node2);
}
node = avl_get_next(node);
}
/* now we register to receive future event notices */
listener->next = (event_listener_t *)_event_listeners;
_event_listeners = listener;
thread_mutex_unlock(&_stats_mutex);
}
static void *_stats_thread(void *arg)
{
stats_event_t *event;
stats_event_t *copy;
stats_node_t *node;
stats_node_t *anode;
stats_source_t *snode;
stats_source_t *asnode;
event_listener_t *listener;
avl_node *avlnode;
while (_stats_running) {
thread_mutex_lock(&_global_event_mutex);
if (_global_event_queue != NULL) {
/* grab the next event from the queue */
event = _global_event_queue;
_global_event_queue = event->next;
event->next = NULL;
thread_mutex_unlock(&_global_event_mutex);
thread_mutex_lock(&_stats_mutex);
if (event->source == NULL) {
/* we have a global event */
if (event->value != NULL) {
/* adding/updating */
node = _find_node(_stats.global_tree, event->name);
if (node == NULL) {
/* add node */
anode = (stats_node_t *)malloc(sizeof(stats_node_t));
anode->name = (char *)strdup(event->name);
anode->value = (char *)strdup(event->value);
avl_insert(_stats.global_tree, (void *)anode);
} else {
/* update node */
free(node->value);
node->value = (char *)strdup(event->value);
}
} else {
/* we're deleting */
node = _find_node(_stats.global_tree, event->name);
if (node != NULL)
avl_delete(_stats.global_tree, (void *)node, _free_stats);
}
} else {
/* we have a source event */
snode = _find_source(_stats.source_tree, event->source);
if (snode != NULL) {
/* this is a source we already have a tree for */
if (event->value != NULL) {
/* we're add/updating */
node = _find_node(snode->stats_tree, event->name);
if (node == NULL) {
/* adding node */
anode = (stats_node_t *)malloc(sizeof(stats_node_t));
anode->name = (char *)strdup(event->name);
anode->value = (char *)strdup(event->value);
avl_insert(snode->stats_tree, (void *)anode);
} else {
/* updating node */
free(node->value);
node->value = (char *)strdup(event->value);
}
} else {
/* we're deleting */
node = _find_node(snode->stats_tree, event->name);
if (node != NULL) {
avl_delete(snode->stats_tree, (void *)node, _free_stats);
avlnode = avl_get_first(snode->stats_tree);
if (avlnode == NULL) {
avl_delete(_stats.source_tree, (void *)snode, _free_source_stats);
}
}
}
} else {
/* this is a new source */
asnode = (stats_source_t *)malloc(sizeof(stats_source_t));
asnode->source = (char *)strdup(event->source);
asnode->stats_tree = avl_tree_new(_compare_stats, NULL);
anode = (stats_node_t *)malloc(sizeof(stats_node_t));
anode->name = (char *)strdup(event->name);
anode->value = (char *)strdup(event->value);
avl_insert(asnode->stats_tree, (void *)anode);
avl_insert(_stats.source_tree, (void *)asnode);
}
}
/* now we have an event that's been processed into the running stats */
/* this event should get copied to event listeners' queues */
listener = _event_listeners;
while (listener) {
copy = _copy_event(event);
thread_mutex_lock(listener->mutex);
_add_event_to_queue(copy, listener->queue);
thread_mutex_unlock(listener->mutex);
listener = listener->next;
}
thread_cond_broadcast(&_event_signal_cond);
/* now we need to destroy the event */
_free_event(event);
thread_mutex_unlock(&_stats_mutex);
continue;
} else {
thread_mutex_unlock(&_global_event_mutex);
}
thread_sleep(300000);
}
/* wake the other threads so they can shut down cleanly */
thread_cond_broadcast(&_event_signal_cond);
thread_exit(0);
return NULL;
}
static void *_stats_thread(void *arg)
{
stats_event_t *event;
stats_event_t *copy;
event_listener_t *listener;
stats_event_time (NULL, "server_start");
stats_event_time_iso8601 (NULL, "server_start_iso8601");
/* global currently active stats */
stats_event (NULL, "clients", "0");
stats_event (NULL, "connections", "0");
stats_event (NULL, "sources", "0");
stats_event (NULL, "stats", "0");
stats_event (NULL, "listeners", "0");
/* global accumulating stats */
stats_event (NULL, "client_connections", "0");
stats_event (NULL, "source_client_connections", "0");
stats_event (NULL, "source_relay_connections", "0");
stats_event (NULL, "source_total_connections", "0");
stats_event (NULL, "stats_connections", "0");
stats_event (NULL, "listener_connections", "0");
ICECAST_LOG_INFO("stats thread started");
while (_stats_running) {
thread_mutex_lock(&_global_event_mutex);
if (_global_event_queue.head != NULL) {
/* grab the next event from the queue */
event = _get_event_from_queue (&_global_event_queue);
thread_mutex_unlock(&_global_event_mutex);
if (event == NULL)
continue;
event->next = NULL;
thread_mutex_lock(&_stats_mutex);
/* check if we are dealing with a global or source event */
if (event->source == NULL)
process_global_event (event);
else
process_source_event (event);
/* now we have an event that's been processed into the running stats */
/* this event should get copied to event listeners' queues */
listener = (event_listener_t *)_event_listeners;
while (listener) {
copy = _copy_event(event);
thread_mutex_lock (&listener->mutex);
_add_event_to_queue (copy, &listener->queue);
thread_mutex_unlock (&listener->mutex);
listener = listener->next;
}
/* now we need to destroy the event */
_free_event(event);
thread_mutex_unlock(&_stats_mutex);
continue;
}
else
{
thread_mutex_unlock(&_global_event_mutex);
}
thread_sleep(300000);
}
return NULL;
}
static void queue_global_event (stats_event_t *event)
{
thread_mutex_lock(&_global_event_mutex);
_add_event_to_queue (event, &_global_event_queue);
thread_mutex_unlock(&_global_event_mutex);
}
static void *_stats_thread(void *arg)
{
stats_event_t *event;
stats_event_t *copy;
event_listener_t *listener;
if (!kitsune_is_updating()) { /**DSU control */
stats_event (NULL, "server", ICECAST_VERSION_STRING);
stats_event_time (NULL, "server_start");
/* global currently active stats */
stats_event (NULL, "clients", "0");
stats_event (NULL, "connections", "0");
stats_event (NULL, "sources", "0");
stats_event (NULL, "stats", "0");
/* global accumulating stats */
stats_event (NULL, "client_connections", "0");
stats_event (NULL, "source_client_connections", "0");
stats_event (NULL, "source_relay_connections", "0");
stats_event (NULL, "source_total_connections", "0");
stats_event (NULL, "stats_connections", "0");
stats_event (NULL, "listener_connections", "0");
INFO0 ("stats thread started");
}
while (_stats_running) {
kitsune_update("stats"); /**DSU updatepoint */
if (_global_event_queue != NULL) {
/* grab the next event from the queue */
thread_mutex_lock(&_global_event_mutex);
event = (stats_event_t *)_global_event_queue;
_global_event_queue = event->next;
thread_mutex_unlock(&_global_event_mutex);
event->next = NULL;
thread_mutex_lock(&_stats_mutex);
/* check if we are dealing with a global or source event */
if (event->source == NULL)
process_global_event (event);
else
process_source_event (event);
/* now we have an event that's been processed into the running stats */
/* this event should get copied to event listeners' queues */
listener = (event_listener_t *)_event_listeners;
while (listener) {
copy = _copy_event(event);
thread_mutex_lock(listener->mutex);
_add_event_to_queue(copy, listener->queue);
thread_mutex_unlock(listener->mutex);
listener = listener->next;
}
/* now we need to destroy the event */
_free_event(event);
thread_mutex_unlock(&_stats_mutex);
continue;
}
thread_sleep(300000);
}
return NULL;
}
