75 lines
2.3 KiB
C
75 lines
2.3 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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#include <glog/logging.h>
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#include <atomic>
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#include <folly/executors/ScheduledExecutor.h>
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#include <folly/futures/Future.h>
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namespace folly {
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struct FOLLY_EXPORT TimekeeperScheduledExecutorNoTimekeeper
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: public std::logic_error {
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TimekeeperScheduledExecutorNoTimekeeper()
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: std::logic_error("No Timekeeper available") {}
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};
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// This class turns a Executor into a ScheduledExecutor.
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class TimekeeperScheduledExecutor : public ScheduledExecutor {
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public:
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TimekeeperScheduledExecutor(TimekeeperScheduledExecutor const&) = delete;
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TimekeeperScheduledExecutor& operator=(TimekeeperScheduledExecutor const&) =
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delete;
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TimekeeperScheduledExecutor(TimekeeperScheduledExecutor&&) = delete;
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TimekeeperScheduledExecutor& operator=(TimekeeperScheduledExecutor&&) =
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delete;
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static Executor::KeepAlive<TimekeeperScheduledExecutor> create(
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Executor::KeepAlive<> parent,
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Function<std::shared_ptr<Timekeeper>()> getTimekeeper =
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detail::getTimekeeperSingleton);
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virtual void add(Func func) override;
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virtual void scheduleAt(Func&& func, ScheduledExecutor::TimePoint const& t)
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override;
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protected:
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bool keepAliveAcquire() override;
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void keepAliveRelease() override;
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private:
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TimekeeperScheduledExecutor(
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KeepAlive<Executor>&& parent,
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Function<std::shared_ptr<Timekeeper>()> getTimekeeper)
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: parent_(std::move(parent)), getTimekeeper_(std::move(getTimekeeper)) {}
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~TimekeeperScheduledExecutor() {
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DCHECK(!keepAliveCounter_);
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}
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void run(Func);
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KeepAlive<Executor> parent_;
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Function<std::shared_ptr<Timekeeper>()> getTimekeeper_;
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std::atomic<ssize_t> keepAliveCounter_{1};
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};
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} // namespace folly
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