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Standard library header <latch> (C++20)

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This header is part of the thread support library.

Classes

(C++20)
single-use thread barrier
(class) [edit]

[edit] Synopsis

namespace std {
  class latch;
}

[edit] Class std::latch

namespace std {
  class latch {
  public:
    static constexpr ptrdiff_t max() noexcept;
 
    constexpr explicit latch(ptrdiff_t expected);
    ~latch();
 
    latch(const latch&) = delete;
    latch& operator=(const latch&) = delete;
 
    void count_down(ptrdiff_t update = 1);
    bool try_wait() const noexcept;
    void wait() const;
    void arrive_and_wait(ptrdiff_t update = 1);
 
  private:
    ptrdiff_t counter;  // exposition only
  };
}