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/*
* Copyright (c) 2017-2019 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.
*/
#ifndef _WIN32
#include <sys/queue.h>
#endif
#include <hicn/util/log.h>
#include <hicn/hicn-light/config.h>
#include <stdio.h>
#include <hicn/core/content_store.h>
#include "lru.h"
// XXX TODO some part to be moved to parent
// XXX TODO
#if 0
static void _content_store_lru_Log(ContentStoreInterface *storeImpl) {
content_store_lru_data_t *store =
(content_store_lru_data_t *)contentStoreInterface_GetPrivateData(storeImpl);
logger_Log(store->logger, LoggerFacility_Processor, PARCLogLevel_All,
__func__,
"ContentStoreLRU @%p {count = %zu, capacity = %zu {"
"stats = @%p {adds = %" PRIu64 ", hits = %" PRIu64
", misses = %" PRIu64 ", LRUEvictons = %" PRIu64
", ExpiryEvictions = %" PRIu64 ", RCTEvictions = %" PRIu64 "} }",
store, store->objectCount, store->objectCapacity, &store->stats,
store->stats.countAdds, store->stats.countHits,
store->stats.countMisses, store->stats.countLruEvictions,
store->stats.countExpiryEvictions, store->stats.countRCTEvictions);
}
static
bool
_content_store_lru_remove_least_used(content_store_t * cs)
{
if (content_store_size(cs) == 0)
return false;
#if 0
ListLruEntry *lruEntry = listLRU_PopTail(store->lru);
content_store_entry_t *storeEntry =
(content_store_entry_t *)listLRU_EntryGetData(lruEntry);
#else
content_store_entry_t * entry = NULL;
#endif
DEBUG("CS %p LRU evict msgbuf %p (#evictions %" PRIu64 ")",
cs, content_store_entry_message(entry),
cs->stats.lru.countLruEvictions);
content_store_purge_entry(cs, entry);
return true;
}
static
void
_evictByStorePolicy(content_store_t * cs, uint64_t currentTimeInTicks)
{
// We need to make room. Here's the plan:
// 1) Check to see if anything has expired. If so, remove it and we're done.
// If not, 2) Remove the least recently used item.
content_store_entry_t *entry =
listTimeOrdered_GetOldest(store->indexByExpirationTime);
if (entry && content_store_entry_has_expiry_time(entry) &&
(currentTimeInTicks > content_store_entry_get_expiry_time(entry))) {
// Found an expired entry. Remove it, and we're done.
store->stats.countExpiryEvictions++;
DEBUG("ContentStore %p evict message %p by ExpiryTime (ExpiryTime evictions %" PRIu64 ")",
(void *)store, (void *)contentStoreEntry_GetMessage(entry),
store->stats.countExpiryEvictions);
_content_store_lru_purge_entry(store, entry);
} else {
store->stats.countLruEvictions++;
_content_store_lru_remove_least_used(store);
}
}
#endif
void
content_store_lru_initialize(content_store_t * cs)
{
content_store_lru_data_t * data = cs->data;
data->lru = NULL;
if (!data->lru) {
ERROR("Could not create LRU index");
goto ERR_INDEX;
}
ERR_INDEX:
return;
}
void
content_store_lru_finalize(content_store_t * cs)
{
content_store_lru_data_t * data = cs->data;
if (data->lru != NULL)
; // XXX TODO listLRU_Destroy(&(store->lru));
}
bool
content_store_lru_add_entry(content_store_t * cs, content_store_entry_t * entry)
{
assert(cs);
assert(entry);
if (content_store_size(cs) == 0)
return false;
#if 0
content_store_lru_data_t * data = cs->data;
content_store_entry_t *dataEntry = parcHashCodeTable_Get(data->storageByName, content);
if(dataEntry)
_content_store_lru_purge_entry(data, dataEntry);
uint64_t expiryTimeTicks = contentStoreEntry_MaxExpiryTime;
if (message_HasContentExpiryTime(content))
expiryTimeTicks = message_GetContentExpiryTimeTicks(content);
// Don't add anything that's already expired or has exceeded RCT.
if (now >= expiryTimeTicks)
return false;
if (data->objectCount >= data->objectCapacity)
// Store is full. Need to make room.
_evictByStorePolicy(data, now);
// And now add a new entry to the head of the LRU.
content_store_entry_t *entry = contentStoreEntry_Create(content, data->lru);
if (!entry)
return false;
if (!parcHashCodeTable_Add(data->storageByName, content, entry)) {
// Free what we just created, but did not add. 'entry' has ownership of
// 'copy', and so will call _Release() on it
contentStoreEntry_Release(&entry);
WARN("ContentStoreLRU %p failed to add message %p to hash table",
(void *)data, (void *)content);
return false;
}
if (content_store_entry_has_expiry_time(entry))
listTimeOrdered_Add(data->indexByExpirationTime, entry);
data->objectCount++;
data->stats.countAdds++;
DEBUG("ContentStoreLRU %p saved message %p (object count %" PRIu64 ")",
data, msgbuf, content_store_size(cs));
#endif
return true;
}
/**
* Remove a content_store_entry_t from all tables and indices.
*/
static
void
content_store_lru_remove_entry(content_store_t * cs, content_store_entry_t * entry)
{
assert(cs);
assert(entry);
//
// XXX REMOVE ENTRY FROM LRU
}
DECLARE_CONTENT_STORE(lru);
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