89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
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/*
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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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#if defined(__linux__) && !defined(__ANDROID__)
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#define FOLLY_HAVE_TIMERFD
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#endif
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#include <folly/io/async/EventBase.h>
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#ifdef FOLLY_HAVE_TIMERFD
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#include <folly/io/async/EventHandler.h>
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#else
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#include <folly/io/async/AsyncTimeout.h>
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#endif
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#include <chrono>
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namespace folly {
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#ifdef FOLLY_HAVE_TIMERFD
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// timerfd wrapper
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class TimerFD : public folly::EventHandler, public DelayedDestruction {
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public:
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explicit TimerFD(folly::EventBase* eventBase);
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~TimerFD() override;
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virtual void onTimeout() noexcept = 0;
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void schedule(std::chrono::microseconds timeout);
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void cancel();
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// from folly::EventHandler
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void handlerReady(uint16_t events) noexcept override;
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protected:
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void close();
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private:
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TimerFD(folly::EventBase* eventBase, int fd);
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static int createTimerFd();
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// use 0 to stop the timer
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bool setTimer(std::chrono::microseconds useconds);
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int fd_{-1};
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};
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#else
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// alternative implementation using a folly::AsyncTimeout
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class TimerFD {
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public:
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explicit TimerFD(folly::EventBase* eventBase);
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virtual ~TimerFD();
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virtual void onTimeout() = 0;
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void schedule(std::chrono::microseconds timeout);
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void cancel();
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protected:
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void close() {}
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private:
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class TimerFDAsyncTimeout : public folly::AsyncTimeout {
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public:
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TimerFDAsyncTimeout(folly::EventBase* eventBase, TimerFD* timerFd);
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~TimerFDAsyncTimeout() override = default;
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// from folly::AsyncTimeout
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void timeoutExpired() noexcept final;
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private:
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TimerFD* timerFd_;
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};
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TimerFDAsyncTimeout timeout_;
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};
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#endif
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} // namespace folly
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