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34 lines
840 B
C++
34 lines
840 B
C++
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#pragma once
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#include <boost/noncopyable.hpp>
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#include <mutex>
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#include <string>
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#include <unordered_set>
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namespace DB
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{
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/// Manages set of active temporary paths that should not be cleaned by background thread.
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class TemporaryParts : private boost::noncopyable
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{
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private:
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/// To add const qualifier for contains()
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mutable std::mutex mutex;
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/// NOTE: It is pretty short, so use STL is fine.
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std::unordered_set<std::string> parts;
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public:
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/// Returns true if passed part name is active.
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/// (is the destination for one of active mutation/merge).
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///
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/// NOTE: that it accept basename (i.e. dirname), not the path,
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/// since later requires canonical form.
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bool contains(const std::string & basename) const;
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void add(std::string basename);
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void remove(const std::string & basename);
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};
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}
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