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-rwxr-xr-xlibtransport/src/hicn/transport/utils/object_pool.h76
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diff --git a/libtransport/src/hicn/transport/utils/object_pool.h b/libtransport/src/hicn/transport/utils/object_pool.h
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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.
+ */
+
+#pragma once
+
+// TODO
+#include <hicn/transport/utils/spinlock.h>
+
+#include <deque>
+#include <memory>
+#include <mutex>
+
+namespace utils {
+
+template <typename T>
+class ObjectPool {
+ class ObjectDeleter {
+ public:
+ ObjectDeleter(ObjectPool<T> *pool = nullptr) : pool_(pool) {}
+
+ void operator()(T *t) {
+ if (pool_) {
+ pool_->add(t);
+ } else {
+ delete t;
+ }
+ }
+
+ private:
+ ObjectPool<T> *pool_;
+ };
+
+ public:
+ using Ptr = std::unique_ptr<T, ObjectDeleter>;
+
+ ObjectPool() {}
+
+ std::pair<bool, Ptr> get() {
+ if (object_pool_.empty()) {
+ return std::make_pair<bool, Ptr>(false, makePtr(nullptr));
+ }
+
+ utils::SpinLock::Acquire locked(object_pool_lock_);
+ auto ret = std::move(object_pool_.front());
+ object_pool_.pop_front();
+ return std::make_pair<bool, Ptr>(true, std::move(ret));
+ }
+
+ void add(T *object) {
+ utils::SpinLock::Acquire locked(object_pool_lock_);
+ object_pool_.emplace_back(makePtr(object));
+ }
+
+ Ptr makePtr(T *object) { return Ptr(object, ObjectDeleter(this)); }
+
+ private:
+ // No copies
+ ObjectPool(const ObjectPool &other) = delete;
+
+ utils::SpinLock object_pool_lock_;
+ std::deque<Ptr> object_pool_;
+};
+
+} // namespace utils \ No newline at end of file