标准库标头 <barrier>

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C++
 
标准库头
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<any> (C++17)
<bitset>
<bit> (C++20)
<charconv> (C++17)
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此头文件是线程支持库的一部分。

类

(C++20)
 可复用的线程屏障
(类模板) [编辑]

概要

namespace std {
  template<class CompletionFunction = /* 见描述 */>
    class barrier;
}

类模板 std::barrier

namespace std {
  template<class CompletionFunction = /* 见描述 */>
  class barrier {
  public:
    using arrival_token =  /* 见描述 */;

    static constexpr ptrdiff_t max() noexcept;

    constexpr explicit barrier(ptrdiff_t expected,
                               CompletionFunction f = CompletionFunction());
    ~barrier();

    barrier(const barrier&) = delete;
    barrier& operator=(const barrier&) = delete;

    arrival_token arrive(ptrdiff_t update = 1);
    void wait(arrival_token&& arrival) const;

    void arrive_and_wait();
    void arrive_and_drop();

  private:
    CompletionFunction completion;      // 仅用于阐释
  };
}