mirror of
https://github.com/ZeroTier/ZeroTierOne
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119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
/**************************************************************************
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Copyright (c) 2021 sewenew
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*************************************************************************/
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#ifndef SEWENEW_REDISPLUSPLUS_EVENT_LOOP_H
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#define SEWENEW_REDISPLUSPLUS_EVENT_LOOP_H
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#include <unordered_set>
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#include <unordered_map>
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#include <memory>
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#include <exception>
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#include <mutex>
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#include <thread>
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#include <uv.h>
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#include "connection.h"
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namespace sw {
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namespace redis {
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class AsyncConnection;
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class AsyncEvent;
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class EventLoop {
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public:
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EventLoop();
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EventLoop(const EventLoop &) = delete;
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EventLoop& operator=(const EventLoop &) = delete;
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EventLoop(EventLoop &&that);
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EventLoop& operator=(EventLoop &&that);
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~EventLoop();
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void unwatch(std::shared_ptr<AsyncConnection> connection, std::exception_ptr err = nullptr);
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void add(std::shared_ptr<AsyncConnection> event);
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// Not thread safe. Only call it in callback functions.
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void watch(redisAsyncContext &ctx);
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private:
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static void _connect_callback(const redisAsyncContext *ctx, int status);
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static void _disconnect_callback(const redisAsyncContext *ctx, int status);
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static void _event_callback(uv_async_t *handle);
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static void _stop_callback(uv_async_t *handle);
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struct LoopDeleter {
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void operator()(uv_loop_t *loop) const;
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};
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using LoopUPtr = std::unique_ptr<uv_loop_t, LoopDeleter>;
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std::string _err_msg(int err) const {
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return uv_strerror(err);
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}
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LoopUPtr _create_event_loop() const;
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using UvAsyncUPtr = std::unique_ptr<uv_async_t>;
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using AsyncCallback = void (*)(uv_async_t*);
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UvAsyncUPtr _create_uv_async(AsyncCallback callback);
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void _stop();
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void _notify();
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void _clean_up(std::unordered_set<std::shared_ptr<AsyncConnection>> &command_events,
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std::unordered_map<std::shared_ptr<AsyncConnection>, std::exception_ptr> &disconnect_events);
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auto _get_events()
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-> std::pair<std::unordered_set<std::shared_ptr<AsyncConnection>>,
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std::unordered_map<std::shared_ptr<AsyncConnection>, std::exception_ptr>>;
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// We must define _event_async and _stop_async before _loop,
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// because these memory can only be release after _loop's deleter
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// has been called, i.e. the deleter will close these handles.
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UvAsyncUPtr _event_async;
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UvAsyncUPtr _stop_async;
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std::thread _loop_thread;
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std::mutex _mtx;
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std::unordered_map<std::shared_ptr<AsyncConnection>, std::exception_ptr> _disconnect_events;
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std::unordered_set<std::shared_ptr<AsyncConnection>> _command_events;
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// _loop must be defined at last, since its destructor needs other data members.
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LoopUPtr _loop;
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};
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using EventLoopSPtr = std::shared_ptr<EventLoop>;
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}
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}
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#endif // end SEWENEW_REDISPLUSPLUS_EVENT_LOOP_H
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