void lru_cache_insert(lru_cache_t* lru,
DIR_handle_t handle,
struct giga_directory* entry) {
ACQUIRE_MUTEX(&(lru->mutex_), "lru_cache_insert(%d)", handle);
// printf("INSERT %d %d, length: %ld, cap: %ld\n", handle, entry->split_flag, lru->length_+1, lru->capacity_);
struct giga_directory* old;
HASH_FIND_INT(lru->table, &handle, old);
if (old != NULL) {
HASH_DEL(lru->table, old);
double_list_remove(old);
lru_cache_unref(old);
} else {
++lru->length_;
}
HASH_ADD_INT(lru->table, handle, entry);
double_list_append(&(lru->dummy), entry);
entry->refcount = 2;
while (lru->length_ > lru->capacity_ && lru->dummy.next != &(lru->dummy)) {
struct giga_directory* old = lru->dummy.next;
// printf("EVICT ENTRY %d\n", old->handle);
HASH_DEL(lru->table, old);
double_list_remove(old);
lru_cache_unref(old);
--lru->length_;
}
RELEASE_MUTEX(&(lru->mutex_), "lru_cache_insert(%d)", handle);
}
struct giga_directory* lru_cache_lookup(lru_cache_t* lru,
DIR_handle_t handle) {
ACQUIRE_MUTEX(&(lru->mutex_), "lru_cache_lookup(%d)", handle);
struct giga_directory* entry;
HASH_FIND_INT(lru->table, &handle, entry);
/*
if (entry != NULL) {
printf("LOOKUP: %d %d\n", handle, entry->split_flag);
} else {
printf("LOOKUP: %d NULL\n", handle);
}
*/
if (entry != NULL) {
entry->refcount ++;
double_list_remove(entry);
double_list_append(&(lru->dummy), entry);
}
RELEASE_MUTEX(&(lru->mutex_), "lru_cache_lookup(%d)", handle);
return entry;
}
void _my_free(void* p)
{
struct alloc_debug_node* m = (struct alloc_debug_node*)p;
--m;
WRITELOCK(_g_alloc_debug_list._locker);
double_list_remove(&_g_alloc_debug_list._link,&m->_link_node);
_g_alloc_debug_list._count --;
WRITEUNLOCK(_g_alloc_debug_list._locker);
free(m);
}
void lru_cache_erase(lru_cache_t* lru,
DIR_handle_t handle) {
ACQUIRE_MUTEX(&(lru->mutex_), "lru_cache_erase(%d)", handle);
struct giga_directory* old;
HASH_FIND_INT(lru->table, &handle, old);
if (old != NULL) {
// printf("DEL %d %d %d\n", old->handle, old->split_flag, old->refcount);
double_list_remove(old);
HASH_DEL(lru->table, old);
lru_cache_unref(old);
--lru->length_;
}
RELEASE_MUTEX(&(lru->mutex_), "lru_cache_erase(%d)", handle);
}
