92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
/**
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* Copyright (C) 2018-present MongoDB, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the Server Side Public License, version 1,
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* as published by MongoDB, Inc.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* Server Side Public License for more details.
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*
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* You should have received a copy of the Server Side Public License
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* along with this program. If not, see
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* <http://www.mongodb.com/licensing/server-side-public-license>.
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*
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* As a special exception, the copyright holders give permission to link the
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* code of portions of this program with the OpenSSL library under certain
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* conditions as described in each individual source file and distribute
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* linked combinations including the program with the OpenSSL library. You
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* must comply with the Server Side Public License in all respects for
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* all of the code used other than as permitted herein. If you modify file(s)
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* with this exception, you may extend this exception to your version of the
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* file(s), but you are not obligated to do so. If you do not wish to do so,
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* delete this exception statement from your version. If you delete this
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* exception statement from all source files in the program, then also delete
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* it in the license file.
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*/
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#pragma once
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#include "mongo/stdx/condition_variable.h"
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#include "mongo/stdx/mutex.h"
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#include "mongo/util/concurrency/thread_pool_interface.h"
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#include "mongo/util/hierarchical_acquisition.h"
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#include "mongo/util/out_of_line_executor.h"
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#include <cstdint>
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#include <mutex>
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#include <vector>
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#include <boost/move/utility_core.hpp>
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namespace mongo {
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namespace executor {
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class NetworkInterface;
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/**
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* A Thread Pool implementation based on running tasks on the background thread
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* of some Network Interface.
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*
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* The basic idea is to triage tasks, running them immediately if we're invoked
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* from on the network interface thread, and queueing them up to be drained by
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* a setAlarm if not.
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*/
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class NetworkInterfaceThreadPool final : public ThreadPoolInterface {
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public:
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NetworkInterfaceThreadPool(NetworkInterface* net);
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~NetworkInterfaceThreadPool() override;
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void startup() override;
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void shutdown() override;
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void join() override;
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void schedule(Task task) override;
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private:
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void _consumeTasks(stdx::unique_lock<stdx::mutex> lk);
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void _consumeTasksInline(stdx::unique_lock<stdx::mutex> lk);
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void _dtorImpl();
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NetworkInterface* const _net;
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// Protects all of the pool state below
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stdx::mutex _mutex;
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stdx::condition_variable _joiningCondition;
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std::vector<Task> _tasks;
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bool _started = false;
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bool _inShutdown = false;
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bool _joining = false;
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enum class ConsumeState {
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kNeutral = 0,
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kScheduled,
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kConsuming,
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};
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ConsumeState _consumeState = ConsumeState::kNeutral;
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};
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} // namespace executor
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} // namespace mongo
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