[HICN-534] Major rework on libtransport organization

Change-Id: I361b83a18b4fd59be136d5f0817fc28e17e89884
Signed-off-by: Mauro Sardara <msardara@cisco.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/libtransport/src/protocols/packet_manager.h b/libtransport/src/protocols/packet_manager.h
new file mode 100644
index 000000000..a552607ea
--- /dev/null
+++ b/libtransport/src/protocols/packet_manager.h
@@ -0,0 +1,65 @@
+/*
+ * 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
+
+#include <hicn/transport/utils/object_pool.h>
+
+namespace transport {
+
+namespace protocol {
+
+using namespace core;
+
+template <typename PacketType, std::size_t packet_pool_size = 4096>
+class PacketManager {
+  static_assert(std::is_base_of<Packet, PacketType>::value,
+                "The packet manager support just Interest and Data.");
+
+ public:
+  PacketManager(std::size_t size = packet_pool_size) : size_(0) {
+    // Create pool of interests
+    increasePoolSize(size);
+  }
+
+  TRANSPORT_ALWAYS_INLINE void increasePoolSize(std::size_t size) {
+    for (std::size_t i = 0; i < size; i++) {
+      interest_pool_.add(new PacketType());
+    }
+
+    size_ += size;
+  }
+
+  TRANSPORT_ALWAYS_INLINE typename PacketType::Ptr getPacket() {
+    auto result = interest_pool_.get();
+
+    while (TRANSPORT_EXPECT_FALSE(!result.first)) {
+      // Add packets to the pool
+      increasePoolSize(size_);
+      result = interest_pool_.get();
+    }
+
+    result.second->resetPayload();
+    return std::move(result.second);
+  }
+
+ private:
+  utils::ObjectPool<PacketType> interest_pool_;
+  std::size_t size_;
+};
+
+}  // end namespace protocol
+
+}  // end namespace transport