void cg_list_clear(CgList *headList, CG_LIST_DESTRUCTORFUNC destructorFunc)
{
CgList *list;
cg_log_debug_l5("Entering...\n");
if (NULL == headList)
return;
list = cg_list_next(headList);
while(list != NULL) {
cg_list_remove(list);
//Theo Beisch: use destructorFunc or just free(listElement)
if (destructorFunc != NULL){
destructorFunc(list);
} else {
free(list);
}
list = cg_list_next(headList);
}
/*** list header must be deleted by user ***/
/* free(headList); */
cg_log_debug_l5("Leaving...\n");
}
int cg_list_size(CgList *headList)
{
CgList *list;
int listCnt;
cg_log_debug_l5("Entering...\n");
if (NULL == headList)
return 0;
listCnt = 0;
for (list = cg_list_next(headList); list != NULL; list = cg_list_next(list))
listCnt++;
cg_log_debug_l5("Leaving...\n");
return listCnt;
}
CgList *cg_list_get(CgList *headList, int index)
{
CgList *list;
int n;
cg_log_debug_l5("Entering...\n");
if (NULL == headList)
return NULL;
list = cg_list_next(headList);
for (n=0; n<index; n++) {
if (NULL == list)
break;
list = cg_list_next(list);
}
cg_log_debug_l5("Leaving...\n");
return list;
}
BOOL cg_http_persistentconnection_put(char *host, int port, void *data)
{
CgHttpPersistentConnection *new_node = NULL, *node = NULL;
cg_log_debug_l4("Entering...\n");
/* If we dont have cache, then just exit */
if (cache == NULL) {
cg_log_debug("(put) No cache! Persistent connections not initialized?\n");
return FALSE;
}
/* Check if we already have this one cached */
for (node = (CgHttpPersistentConnection*)cg_list_gets((CgList*)cache);
node != NULL;
node = (CgHttpPersistentConnection*)cg_list_next((CgList*)node))
{
if (cg_strcmp(cg_string_getvalue(node->host), host) == 0 &&
node->port == port)
{
/* If also data is the same, then update just
timestamp */
if (node->cacheData == data)
{
node->timestamp = cg_getcurrentsystemtime();
return TRUE;
}
cg_log_debug_s("Found cached persistent connection for %s:%d\n",
cg_string_getvalue(node->host), node->port);
new_node = node;
cg_list_remove((CgList*)new_node);
break;
}
}
/* We didn't find it */
if (new_node == NULL)
{
/* Check if we have already too many cached things */
if (cg_list_size((CgList*)cache) >= CG_HTTP_PERSISTENT_CACHE_SIZE)
{
/* Take last node (not refreshed for a long time) */
new_node = (CgHttpPersistentConnection *)cg_list_next((CgList *)cache);
cg_list_remove((CgList*)new_node);
cg_http_persistentconnection_delete(new_node);
new_node = NULL;
cg_log_debug_s("Max persistent HTTP connection cache reached.\n");
}
if (new_node == NULL)
{
if (data == NULL) return TRUE;
new_node = cg_http_persistentconnection_new();
if (new_node == NULL) return FALSE;
cg_log_debug_s("Adding persistent HTTP Connection %s:%d to cache\n",
host, port);
cg_log_debug_s("Persistent connections: %d\n", cg_list_size((CgList*)cache));
}
}
if (data != NULL)
{
/* Set appropriate values for the node */
cg_string_setvalue(new_node->host, host);
new_node->port = port;
new_node->cacheData = data;
new_node->timestamp = cg_getcurrentsystemtime();
cg_list_add((CgList*)cache, (CgList*)new_node);
} else {
/* remove and delete node */
cg_http_persistentconnection_delete(new_node);
}
return TRUE;
cg_log_debug_l4("Leaving...\n");
}
void *cg_http_persistentconnection_get(char *host, int port)
{
CgHttpPersistentConnection *node;
CgSysTime sys_time = cg_getcurrentsystemtime();
BOOL iterate;
cg_log_debug_l4("Entering...\n");
/* If we dont have cache, then just exit */
if (cache == NULL) {
cg_log_debug("(get) No cache! Persistent connections not initialized?\n");
return NULL;
}
/* Clear all expired nodes */
do {
iterate = FALSE;
for (node = (CgHttpPersistentConnection*)cg_list_gets((CgList*)cache);
node != NULL;
node = (CgHttpPersistentConnection*)cg_list_next((CgList*)node))
{
if (sys_time > node->timestamp + CG_HTTP_PERSISTENT_TIMEOUT_PERIOD)
{
cg_log_debug_s("Timeout for persistent HTTP Connection to %s:%d "
"(timestamp: %d)\n",
cg_string_getvalue(node->host), node->port,
node->timestamp);
cg_list_remove((CgList*)node);
cg_http_persistentconnection_delete(node);
iterate = TRUE;
break;
}
}
} while (iterate);
/* Get persistent node */
for (node = (CgHttpPersistentConnection*)cg_list_gets((CgList*)cache);
node != NULL;
node = (CgHttpPersistentConnection*)cg_list_next((CgList*)node))
{
if (cg_strcmp(cg_string_getvalue(node->host), host) == 0 &&
node->port == port)
{
/* Node was required, remove and add again to refresh
cache */
cg_list_remove((CgList*)node);
cg_list_add((CgList*)cache, (CgList*)node);
node->timestamp = cg_getcurrentsystemtime();
cg_log_debug_s("Persistent HTTP Connection cache HIT for %s:%d\n",
host, port);
return node->cacheData;
}
}
cg_log_debug_s("Persistent HTTP Connection cache MISS for %s:%d\n",
host, port);
return NULL;
cg_log_debug_l4("Leaving...\n");
}