/* Add a node to the linked list with the current data from the server. */
void add_node(cache* list, char* url, char* data, int length)
{
node* p;
if (list == NULL)
return;
p = new_node(url, data, length);
if (p == NULL)
return;
if (list->empty_size >= p->size)
{
P(&list->mutex_w);
insert_node_end(list, p);
V(&list->mutex_w);
}
else
{
P(&list->mutex_w);
evict_node(list, p);
insert_node_end(list, p);
V(&list->mutex_w);
}
return;
}
/*
* write_cache - Write the response to the cache
*
* Given uri, response, the size of response and the cache-list header
* Insert a node with all these information
*
*/
int write_cache(Cache cache, char *uri, char *res, int res_size)
{
c_dbgprintf("\n-------------------------------\n");
c_dbgprintf(" -try writing uri: %s\n", uri);
if (res_size > MAX_OBJECT_SIZE)
return 0;
if (uri[strlen(uri) + 1] == '/')
return 0;
sem_wait(cache->write);
evict_node(cache, res_size);
Node new_n = new_node(uri, res, res_size);
if (cache->head == NULL && cache->tail == NULL)
{
cache->head = new_n;
cache->tail = new_n;
new_n->next = NULL;
}
else
{
new_n->next = cache->head;
cache->head = new_n;
// cache->tail->next = new_n;
// cache->tail = new_n;
}
cache->left_size -= res_size;
c_dbgprintf(" -write in cache, uri: %s\n", new_n->uri);
c_dbgprintf(" -left size: %d\n", cache->left_size);
c_dbgprintf("-------------------------------\n");
sem_post(cache->write);
return 1;
}
