aboutsummaryrefslogtreecommitdiffstats
path: root/libtransport/src/utils/max_filter.h
diff options
context:
space:
mode:
Diffstat (limited to 'libtransport/src/utils/max_filter.h')
-rw-r--r--libtransport/src/utils/max_filter.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/libtransport/src/utils/max_filter.h b/libtransport/src/utils/max_filter.h
new file mode 100644
index 000000000..db1a1a565
--- /dev/null
+++ b/libtransport/src/utils/max_filter.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2021 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 <deque>
+#include <iostream>
+#include <set>
+#include <type_traits>
+#include <vector>
+
+namespace utils {
+
+template <typename T>
+class MaxFilter {
+ public:
+ MaxFilter(std::size_t size) : size_(size) {}
+
+ std::size_t size() const { return by_arrival_.size(); }
+
+ template <typename R>
+ 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)));
+ }
+
+ void clear() {
+ by_arrival_.clear();
+ by_order_.clear();
+ }
+
+ const T& begin() const { return *by_order_.crbegin(); }
+
+ const T& rBegin() const { return *by_order_.rbegin(); }
+
+ private:
+ std::multiset<T> by_order_;
+ std::deque<typename std::multiset<T>::const_iterator> by_arrival_;
+ std::size_t size_;
+};
+
+} // namespace utils