1 files changed, 126 insertions, 0 deletions

diff --git a/libtransport/includes/hicn/transport/utils/event_thread.h b/libtransport/includes/hicn/transport/utils/event_thread.h
new file mode 100644
index 000000000..bb6ab90ef
--- /dev/null
+++ b/libtransport/includes/hicn/transport/utils/event_thread.h
@@ -0,0 +1,126 @@
+/*
+ * 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/config.h>
+#include <hicn/transport/errors/runtime_exception.h>
+#include <hicn/transport/utils/log.h>
+
+#ifndef ASIO_STANDALONE
+#define ASIO_STANDALONE
+#endif
+#include <asio.hpp>
+#include <memory>
+#include <thread>
+
+namespace utils {
+
+class EventThread {
+ public:
+  EventThread(asio::io_service& io_service, bool detached = false)
+      : internal_io_service_(nullptr),
+        io_service_(std::ref(io_service)),
+        work_(std::make_unique<asio::io_service::work>(io_service_)),
+        thread_(nullptr),
+        detached_(detached) {
+    run();
+  }
+
+  EventThread(bool detached = false)
+      : internal_io_service_(std::make_unique<asio::io_service>()),
+        io_service_(std::ref(*internal_io_service_)),
+        work_(std::make_unique<asio::io_service::work>(io_service_)),
+        thread_(nullptr),
+        detached_(detached) {
+    run();
+  }
+
+  EventThread(const EventThread&) = delete;
+  EventThread& operator=(const EventThread&) = delete;
+
+  EventThread(EventThread&& other)
+      : internal_io_service_(std::move(other.internal_io_service_)),
+        io_service_(std::move(other.io_service_)),
+        work_(std::move(other.work_)),
+        thread_(std::move(other.thread_)),
+        detached_(std::move(other.detached_)) {}
+
+  EventThread& operator=(EventThread&& other) {
+    internal_io_service_ = std::move(other.internal_io_service_);
+    io_service_ = std::move(other.io_service_);
+    work_ = std::move(other.work_);
+    thread_ = std::move(other.thread_);
+    detached_ = other.detached_;
+
+    return *this;
+  }
+
+  ~EventThread() { stop(); }
+
+  void run() {
+    if (stopped()) {
+      io_service_.get().stopped();
+    }
+
+    thread_ =
+        std::make_unique<std::thread>([this]() { io_service_.get().run(); });
+
+    if (detached_) {
+      thread_->detach();
+    }
+  }
+
+  std::thread::id getThreadId() const {
+    if (thread_) {
+      return thread_->get_id();
+    } else {
+      throw errors::RuntimeException("Event thread is not running.");
+    }
+  }
+
+  template <typename Func>
+  void add(Func&& f) {
+    io_service_.get().post(std::forward<Func&&>(f));
+  }
+
+  template <typename Func>
+  void tryRunHandlerNow(Func&& f) {
+    io_service_.get().dispatch(std::forward<Func&&>(f));
+  }
+
+  void stop() {
+    work_.reset();
+
+    if (thread_ && thread_->joinable()) {
+      thread_->join();
+    }
+
+    thread_.reset();
+  }
+
+  bool stopped() { return io_service_.get().stopped(); }
+
+  asio::io_service& getIoService() { return io_service_; }
+
+ private:
+  std::unique_ptr<asio::io_service> internal_io_service_;
+  std::reference_wrapper<asio::io_service> io_service_;
+  std::unique_ptr<asio::io_service::work> work_;
+  std::unique_ptr<std::thread> thread_;
+  bool detached_;
+};
+
+}  // namespace utils
\ No newline at end of file