[HICN-534] Major rework on libtransport organization

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

1 files changed, 76 insertions, 0 deletions

diff --git a/libtransport/src/utils/content_store.h b/libtransport/src/utils/content_store.h
new file mode 100644
index 000000000..03ce76f42
--- /dev/null
+++ b/libtransport/src/utils/content_store.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
+
+#include <hicn/transport/utils/spinlock.h>
+
+#include <mutex>
+
+namespace transport {
+
+namespace core {
+class Name;
+class ContentObject;
+class Interest;
+}  // namespace core
+
+}  // namespace transport
+
+namespace utils {
+
+using Name = transport::core::Name;
+using ContentObject = transport::core::ContentObject;
+using Interest = transport::core::Interest;
+
+typedef std::pair<std::shared_ptr<ContentObject>,
+                  std::chrono::steady_clock::time_point>
+    ObjectTimeEntry;
+typedef std::pair<ObjectTimeEntry,
+                  std::list<std::reference_wrapper<const Name>>::iterator>
+    ContentStoreEntry;
+typedef std::list<std::reference_wrapper<const Name>> FIFOList;
+typedef std::unordered_map<Name, ContentStoreEntry> ContentStoreHashTable;
+
+class ContentStore {
+ public:
+  explicit ContentStore(std::size_t max_packets = (1 << 16));
+
+  ~ContentStore();
+
+  void insert(const std::shared_ptr<ContentObject> &content_object);
+
+  const std::shared_ptr<ContentObject> find(const Interest &interest);
+
+  void erase(const Name &exact_name);
+
+  void setLimit(size_t max_packets);
+
+  size_t getLimit() const;
+
+  size_t size() const;
+
+  void printContent();
+
+ private:
+  ContentStoreHashTable content_store_hash_table_;
+  FIFOList fifo_list_;
+  std::shared_ptr<ContentObject> empty_reference_;
+  // Must be atomic
+  std::atomic_size_t max_content_store_size_;
+  mutable utils::SpinLock cs_mutex_;
+};
+
+}  // end namespace utils
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