84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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#pragma once
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#include <memory>
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#include <thread>
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#include <folly/io/async/EventBase.h>
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#include <folly/synchronization/Baton.h>
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namespace folly {
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class EventBaseManager;
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template <class Iter>
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class Range;
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typedef Range<const char*> StringPiece;
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/**
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* A helper class to start a new thread running a EventBase loop.
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*
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* The new thread will be started by the ScopedEventBaseThread constructor.
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* When the ScopedEventBaseThread object is destroyed, the thread will be
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* stopped.
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*/
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class ScopedEventBaseThread : public IOExecutor, public SequencedExecutor {
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public:
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ScopedEventBaseThread();
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explicit ScopedEventBaseThread(StringPiece name);
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explicit ScopedEventBaseThread(EventBaseManager* ebm);
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explicit ScopedEventBaseThread(EventBaseManager* ebm, StringPiece name);
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ScopedEventBaseThread(
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EventBase::Options eventBaseOptions,
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EventBaseManager* ebm,
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StringPiece name);
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~ScopedEventBaseThread();
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EventBase* getEventBase() const { return &eb_; }
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EventBase* getEventBase() override { return &eb_; }
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std::thread::id getThreadId() const { return th_.get_id(); }
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void add(Func func) override { getEventBase()->add(std::move(func)); }
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protected:
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bool keepAliveAcquire() noexcept override {
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return getEventBase()->keepAliveAcquire();
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}
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void keepAliveRelease() noexcept override {
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getEventBase()->keepAliveRelease();
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}
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private:
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ScopedEventBaseThread(ScopedEventBaseThread&& other) = delete;
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ScopedEventBaseThread& operator=(ScopedEventBaseThread&& other) = delete;
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ScopedEventBaseThread(const ScopedEventBaseThread& other) = delete;
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ScopedEventBaseThread& operator=(const ScopedEventBaseThread& other) = delete;
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EventBaseManager* ebm_;
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union {
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mutable EventBase eb_;
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};
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std::thread th_;
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folly::Baton<> stop_;
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};
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} // namespace folly
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