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/*
* Copyright (c) 2017 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.
*/
#include "icnet_content_store.h"
namespace icnet {
ContentStore::ContentStore(std::size_t max_packets)
: max_content_store_size_(max_packets) {
}
ContentStore::~ContentStore() {
content_store_hash_table_.clear();
}
void ContentStore::insert(const std::shared_ptr<ContentObject> &content_object) {
std::unique_lock<std::mutex> lock(cs_mutex_);
if (content_store_hash_table_.size() >= max_content_store_size_) {
// Evict item
content_store_hash_table_.erase(lru_list_.back());
lru_list_.pop_back();
}
// Insert new item
lru_list_.push_back(std::cref(content_object->getName()));
LRUList::iterator pos = lru_list_.end();
content_store_hash_table_[content_object->getName()] = CcnxContentStoreEntry(content_object, pos);
}
const std::shared_ptr<ContentObject> &ContentStore::find(const Interest &interest) {
std::unique_lock<std::mutex> lock(cs_mutex_);
ContentStoreHashTable::iterator it = content_store_hash_table_.find(interest.getName());
if (it != content_store_hash_table_.end()) {
if (it->second.second != lru_list_.begin()) {
// Move element to the top of the LRU list
lru_list_.splice(lru_list_.begin(), lru_list_, it->second.second);
}
return it->second.first;
} else {
return empty_reference_;
}
}
void ContentStore::erase(const Name &exact_name) {
std::unique_lock<std::mutex> lock(cs_mutex_);
ContentStoreHashTable::iterator it = content_store_hash_table_.find(exact_name);
lru_list_.erase(it->second.second);
content_store_hash_table_.erase(exact_name);
}
void ContentStore::setLimit(size_t max_packets) {
max_content_store_size_ = max_packets;
}
std::size_t ContentStore::getLimit() const {
return max_content_store_size_;
}
std::size_t ContentStore::size() const {
return content_store_hash_table_.size();
}
} // end namespace icnet
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