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/*
* Copyright (c) 2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* \file content_store.c
* \brief Implementation of hICN content_store
*/
#include <inttypes.h>
#include <hicn/base/pool.h>
#include <hicn/util/log.h>
//#include <hicn/content_store/lru.h>
#include "content_store.h"
extern const content_store_ops_t content_store_lru;
const content_store_ops_t * const content_store_vft[] = {
[CONTENT_STORE_TYPE_LRU] = &content_store_lru,
};
// XXX TODO replace by a single packet cache
// XXX TODO per cs type entry data too !
// XXX TODO getting rid of logger and the need to acquire
// XXX TODO separate cs from vft, same with strategy
#define content_store_entry_from_msgbuf(entry, msgbuf) \
do { \
(entry)->hasExpiryTimeTicks = msgbuf_HasContentExpiryTime(msgbuf); \
if ((entry)->hasExpiryTimeTicks) \
(entry)->expiryTimeTicks = msgbuf_GetContentExpiryTimeTicks(msgbuf); \
} while(0)
content_store_t *
content_store_create(content_store_type_t type, size_t max_elts)
{
content_store_t * cs = malloc(sizeof(content_store_t));
if (!cs)
goto ERR_MALLOC;
if (!CONTENT_STORE_TYPE_VALID(type))
goto ERR_TYPE;
cs->type = type;
// XXX TODO an entry = data + metadata specific to each policy
pool_init(cs->entries, max_elts);
// data
// options
// stats
// index by name
cs->index_by_name = kh_init(cs_name);
cs->index_by_expiry_time = NULL;
if (!cs->index_by_expiry_time) {
ERROR("Could not create index (expiry time)");
goto ERR_INDEX_EXPIRY;
}
// XXX indices specific to each policy => vft
// index by expiration time
// lru ?
content_store_vft[type]->initialize(cs);
ERR_INDEX_EXPIRY:
// XXX TODO
ERR_TYPE:
ERR_MALLOC:
return NULL;
}
void
content_store_free(content_store_t * cs)
{
content_store_vft[cs->type]->finalize(cs);
if (cs->index_by_expiry_time)
; //listTimeOrdered_Release(&(store->indexByExpirationTime));
}
void content_store_clear(content_store_t * cs)
{
// XXX TODO
}
msgbuf_t *
content_store_match(content_store_t * cs, msgbuf_t * msgbuf, uint64_t now)
{
assert(cs);
assert(msgbuf);
assert(msgbuf_get_type(msgbuf) == MESSAGE_TYPE_INTEREST);
/* Lookup entry by name */
khiter_t k = kh_get_cs_name(cs->index_by_name, msgbuf_get_name(msgbuf));
if (k == kh_end(cs->index_by_name))
return NULL;
content_store_entry_t * entry = cs->entries + kh_val(cs->index_by_name, k);
assert(entry);
/* Remove any expired entry */
if (content_store_entry_has_expiry_time(entry) &&
content_store_entry_expiry_time(entry) < now) {
// the entry is expired, we can remove it
content_store_remove_entry(cs, entry);
goto NOT_FOUND;
}
cs->stats.lru.countHits++;
#if 0 // XXX
contentStoreEntry_MoveToHead(entry);
#endif
DEBUG("CS %p LRU match %p (hits %" PRIu64 ", misses %" PRIu64 ")",
cs, msgbuf, cs->stats.lru.countHits, cs->stats.lru.countMisses);
return content_store_entry_message(entry);
NOT_FOUND:
cs->stats.lru.countMisses++;
DEBUG("ContentStoreLRU %p missed msgbuf %p (hits %" PRIu64 ", misses %" PRIu64 ")",
cs, msgbuf, cs->stats.lru.countHits, cs->stats.lru.countMisses);
return NULL;
}
void
content_store_add(content_store_t * cs, msgbuf_t * msgbuf, uint64_t now)
{
assert(cs);
assert(msgbuf);
assert(msgbuf_get_type(msgbuf) == MESSAGE_TYPE_DATA);
content_store_entry_t * entry = NULL;
/* borrow from content_store_lru_add_entry */
content_store_vft[cs->type]->add_entry(cs, entry);
}
void
content_store_remove_entry(content_store_t * cs, content_store_entry_t * entry)
{
assert(cs);
assert(entry);
if (content_store_entry_has_expiry_time(entry))
; // XXX TODO listTimeOrdered_Remove(store->indexByExpirationTime, entryToPurge);
msgbuf_t * msgbuf = content_store_entry_message(entry);
khiter_t k = kh_get_cs_name(cs->index_by_name, msgbuf_get_name(msgbuf));
if (k != kh_end(cs->index_by_name))
kh_del(cs_name, cs->index_by_name, k);
// This will take care of LRU entry for instance
content_store_vft[cs->type]->remove_entry(cs, entry);
//store->objectCount--;
pool_put(cs->entries, entry);
}
//
// XXX TODO what is the difference between purge and remove ?
bool
content_store_remove(content_store_t * cs, msgbuf_t * msgbuf)
{
assert(cs);
assert(msgbuf);
assert(msgbuf_get_type(msgbuf) == MESSAGE_TYPE_DATA);
/* Lookup entry by name */
khiter_t k = kh_get_cs_name(cs->index_by_name, msgbuf_get_name(msgbuf));
if (k == kh_end(cs->index_by_name))
return false;
content_store_entry_t * entry = cs->entries + kh_val(cs->index_by_name, k);
assert(entry);
content_store_remove_entry(cs, entry);
return true;
}
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