Merge "[HICN-534] Major rework on libtransport organization"

1 files changed, 80 insertions, 0 deletions

diff --git a/libtransport/src/utils/epoll_event_reactor.h b/libtransport/src/utils/epoll_event_reactor.h
new file mode 100644
index 000000000..4cb87ebd4
--- /dev/null
+++ b/libtransport/src/utils/epoll_event_reactor.h
@@ -0,0 +1,80 @@
+/*
+ * 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 <utils/event_reactor.h>
+
+#include <sys/epoll.h>
+#include <atomic>
+#include <cstddef>
+#include <functional>
+#include <mutex>
+#include <unordered_map>
+
+#define FD_NUMBER 20000
+
+namespace utils {
+
+typedef struct epoll_event Event;
+typedef std::function<int(const Event &)> EventCallback;
+typedef std::unordered_map<int, EventCallback> EventCallbackMap;
+
+class EpollEventReactor : public EventReactor {
+ public:
+  explicit EpollEventReactor();
+
+  ~EpollEventReactor();
+
+  template <typename EventHandler>
+  int addFileDescriptor(int fd, uint32_t events, EventHandler &&callback) {
+    auto it = event_callback_map_.find(fd);
+    int ret = 0;
+
+    if (it == event_callback_map_.end()) {
+      {
+        utils::SpinLock::Acquire locked(event_callback_map_lock_);
+        event_callback_map_[fd] = std::forward<EventHandler &&>(callback);
+      }
+
+      ret = addFileDescriptor(fd, events);
+    }
+
+    return ret;
+  }
+
+  int delFileDescriptor(int fd);
+
+  int modFileDescriptor(int fd, uint32_t events);
+
+  void runEventLoop(int timeout = -1) override;
+
+  void runOneEvent() override;
+
+  void stop() override;
+
+  std::size_t mapSize();
+
+ private:
+  int addFileDescriptor(int fd, uint32_t events);
+
+  int epoll_fd_;
+  std::atomic_bool run_event_loop_;
+  EventCallbackMap event_callback_map_;
+  utils::SpinLock event_callback_map_lock_;
+};
+
+}  // namespace utils