From bac3da61644515f05663789b122554dc77549286 Mon Sep 17 00:00:00 2001
From: Luca Muscariello <lumuscar+fdio@cisco.com>
Date: Thu, 17 Jan 2019 13:47:57 +0100
Subject: This is the first commit of the hicn project

Change-Id: I6f2544ad9b9f8891c88cc4bcce3cf19bd3cc863f
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>
---
 .../src/hicn/transport/utils/object_pool.h         | 76 ++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100755 libtransport/src/hicn/transport/utils/object_pool.h

(limited to 'libtransport/src/hicn/transport/utils/object_pool.h')

diff --git a/libtransport/src/hicn/transport/utils/object_pool.h b/libtransport/src/hicn/transport/utils/object_pool.h
new file mode 100755
index 000000000..d4d8e18d6
--- /dev/null
+++ b/libtransport/src/hicn/transport/utils/object_pool.h
@@ -0,0 +1,76 @@
+/*
+ * 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
-- 
cgit 1.2.3-korg