/* Useful for debugging the connection cache */
void Curl_conncache_print(struct conncache *connc)
{
struct curl_hash_iterator iter;
struct curl_llist_element *curr;
struct curl_hash_element *he;
if(!connc)
return;
fprintf(stderr, "=Bundle cache=\n");
Curl_hash_start_iterate(connc->hash, &iter);
he = Curl_hash_next_element(&iter);
while(he) {
struct connectbundle *bundle;
struct connectdata *conn;
bundle = he->ptr;
fprintf(stderr, "%s -", he->key);
curr = bundle->conn_list->head;
while(curr) {
conn = curr->ptr;
fprintf(stderr, " [%p %d]", (void *)conn, conn->inuse);
curr = curr->next;
}
fprintf(stderr, "\n");
he = Curl_hash_next_element(&iter);
}
}
/* This function iterates the entire connection cache and calls the
function func() with the connection pointer as the first argument
and the supplied 'param' argument as the other,
Return 0 from func() to continue the loop, return 1 to abort it.
*/
void Curl_conncache_foreach(struct conncache *connc,
void *param,
int (*func)(struct connectdata *conn, void *param))
{
struct curl_hash_iterator iter;
struct curl_llist_element *curr;
struct curl_hash_element *he;
if(!connc)
return;
Curl_hash_start_iterate(&connc->hash, &iter);
he = Curl_hash_next_element(&iter);
while(he) {
struct connectbundle *bundle;
bundle = he->ptr;
he = Curl_hash_next_element(&iter);
curr = bundle->conn_list->head;
while(curr) {
/* Yes, we need to update curr before calling func(), because func()
might decide to remove the connection */
struct connectdata *conn = curr->ptr;
curr = curr->next;
if(1 == func(conn, param))
return;
}
}
}
/* If we have reached the end of the list, find the next one */
if(!iter->current_element) {
for(i = iter->slot_index;i < h->slots;i++) {
if(h->table[i]->head) {
iter->current_element = h->table[i]->head;
iter->slot_index = i+1;
break;
}
}
}
if(iter->current_element) {
struct curl_hash_element *he = iter->current_element->ptr;
return he;
}
else {
iter->current_element = NULL;
return NULL;
}
}
#if 0 /* useful function for debugging hashes and their contents */
void Curl_hash_print(struct curl_hash *h,
void (*func)(void *))
{
struct curl_hash_iterator iter;
struct curl_hash_element *he;
int last_index = -1;
if(!h)
return;
fprintf(stderr, "=Hash dump=\n");
Curl_hash_start_iterate(h, &iter);
he = Curl_hash_next_element(&iter);
while(he) {
if(iter.slot_index != last_index) {
fprintf(stderr, "index %d:", iter.slot_index);
if(last_index >= 0) {
fprintf(stderr, "\n");
}
last_index = iter.slot_index;
}
if(func)
func(he->ptr);
else
fprintf(stderr, " [%p]", (void *)he->ptr);
he = Curl_hash_next_element(&iter);
}
fprintf(stderr, "\n");
}
/*
* This function finds the connection in the connection cache that has been
* unused for the longest time and extracts that from the bundle.
*
* Returns the pointer to the connection, or NULL if none was found.
*/
struct connectdata *
Curl_conncache_extract_oldest(struct Curl_easy *data)
{
struct conncache *connc = data->state.conn_cache;
struct curl_hash_iterator iter;
struct curl_llist_element *curr;
struct curl_hash_element *he;
timediff_t highscore =- 1;
timediff_t score;
struct curltime now;
struct connectdata *conn_candidate = NULL;
struct connectbundle *bundle;
struct connectbundle *bundle_candidate = NULL;
now = Curl_now();
CONN_LOCK(data);
Curl_hash_start_iterate(&connc->hash, &iter);
he = Curl_hash_next_element(&iter);
while(he) {
struct connectdata *conn;
bundle = he->ptr;
curr = bundle->conn_list.head;
while(curr) {
conn = curr->ptr;
if(!CONN_INUSE(conn)) {
/* Set higher score for the age passed since the connection was used */
score = Curl_timediff(now, conn->now);
if(score > highscore) {
highscore = score;
conn_candidate = conn;
bundle_candidate = bundle;
}
}
curr = curr->next;
}
he = Curl_hash_next_element(&iter);
}
if(conn_candidate) {
/* remove it to prevent another thread from nicking it */
bundle_remove_conn(bundle_candidate, conn_candidate);
connc->num_conn--;
DEBUGF(infof(data, "The cache now contains %zu members\n",
connc->num_conn));
conn_candidate->data = data; /* associate! */
}
CONN_UNLOCK(data);
return conn_candidate;
}
static void conncache_remove_bundle(struct conncache *connc,
struct connectbundle *bundle)
{
struct curl_hash_iterator iter;
struct curl_hash_element *he;
if(!connc)
return;
Curl_hash_start_iterate(&connc->hash, &iter);
he = Curl_hash_next_element(&iter);
while(he) {
if(he->ptr == bundle) {
/* The bundle is destroyed by the hash destructor function,
free_bundle_hash_entry() */
Curl_hash_delete(&connc->hash, he->key, he->key_len);
return;
}
he = Curl_hash_next_element(&iter);
}
}
/* Return the first connection found in the cache. Used when closing all
connections */
struct connectdata *
Curl_conncache_find_first_connection(struct conncache *connc)
{
struct curl_hash_iterator iter;
struct curl_hash_element *he;
struct connectbundle *bundle;
Curl_hash_start_iterate(&connc->hash, &iter);
he = Curl_hash_next_element(&iter);
while(he) {
struct curl_llist_element *curr;
bundle = he->ptr;
curr = bundle->conn_list->head;
if(curr) {
return curr->ptr;
}
he = Curl_hash_next_element(&iter);
}
return NULL;
}