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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.sudo make instamake install
*/
#pragma once
#include <hicn/transport/portability/portability.h>
#include <hicn/transport/utils/log.h>
#include <deque>
#include <iostream>
#include <set>
#include <type_traits>
#include <vector>
namespace utils {
template <typename T>
class MinFilter {
public:
MinFilter(std::size_t size) : size_(size) {}
std::size_t size() { return by_arrival_.size(); }
template <typename R>
TRANSPORT_ALWAYS_INLINE void pushBack(R&& value) {
if (by_arrival_.size() > size_) {
by_order_.erase(by_arrival_.back());
by_arrival_.pop_back();
}
by_arrival_.push_front(by_order_.insert(std::forward<R>(value)));
}
TRANSPORT_ALWAYS_INLINE const T& begin() { return *by_order_.cbegin(); }
TRANSPORT_ALWAYS_INLINE const T& rBegin() { return *by_order_.crbegin(); }
private:
std::multiset<T> by_order_;
std::deque<typename std::multiset<T>::const_iterator> by_arrival_;
std::size_t size_;
};
} // namespace utils
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