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43 lines
921 B
C++
43 lines
921 B
C++
#pragma once
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#include <zkutil/ZooKeeperHolder.h>
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#include <string>
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#include <functional>
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namespace zkutil
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{
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/** Single distributed barrier for ZooKeeper.
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*/
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class SingleBarrier final
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{
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public:
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using CancellationHook = std::function<void()>;
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public:
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SingleBarrier(ZooKeeperPtr zookeeper_, const std::string & path_, size_t counter_);
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SingleBarrier(const SingleBarrier &) = delete;
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SingleBarrier & operator=(const SingleBarrier &) = delete;
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SingleBarrier(SingleBarrier &&) = default;
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SingleBarrier & operator=(SingleBarrier &&) = default;
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/// Register a function that checks whether barrier operation should be cancelled.
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void setCancellationHook(CancellationHook cancellation_hook_);
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void enter(uint64_t timeout = 0);
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private:
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void abortIfRequested();
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private:
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ZooKeeperPtr zookeeper;
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EventPtr event = new Poco::Event;
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CancellationHook cancellation_hook;
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std::string path;
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size_t counter;
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};
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}
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