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标准库头文件 <condition_variable> (C++11)

来自 cppreference.com
< cpp‎ | header
 
 
标准库头文件
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<condition_variable> (C++11)  
<semaphore> (C++20)
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<cstdalign> (C++11/17/20*)

<ciso646> (直到 C++20)

 

此头文件是 线程支持 库的一部分。

内容

提供与 std::unique_lock 关联的条件变量
(类) [编辑]
提供与任何锁类型关联的条件变量
(类) [编辑]
(C++11)
列出条件变量计时等待的可能结果
(枚举) [编辑]

函数

安排在当前线程完全结束时调用 notify_all
(函数) [编辑]

[编辑] 概要

namespace std {
  class condition_variable;
  class condition_variable_any;
 
  void notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk);
 
  enum class cv_status { no_timeout, timeout };
}

[编辑] std::condition_variable

namespace std {
  class condition_variable {
  public:
    condition_variable();
    ~condition_variable();
 
    condition_variable(const condition_variable&) = delete;
    condition_variable& operator=(const condition_variable&) = delete;
 
    void notify_one() noexcept;
    void notify_all() noexcept;
    void wait(unique_lock<mutex>& lock);
    template<class Pred>
      void wait(unique_lock<mutex>& lock, Pred pred);
    template<class Clock, class Duration>
      cv_status wait_until(unique_lock<mutex>& lock,
                           const chrono::time_point<Clock, Duration>& abs_time);
    template<class Clock, class Duration, class Pred>
      bool wait_until(unique_lock<mutex>& lock,
                      const chrono::time_point<Clock, Duration>& abs_time, Pred pred);
    template<class Rep, class Period>
      cv_status wait_for(unique_lock<mutex>& lock,
                         const chrono::duration<Rep, Period>& rel_time);
    template<class Rep, class Period, class Pred>
      bool wait_for(unique_lock<mutex>& lock,
                    const chrono::duration<Rep, Period>& rel_time, Pred pred);
 
    using native_handle_type = /* implementation-defined */;
    native_handle_type native_handle();
  };
}

[编辑] std::condition_variable_any

namespace std {
  class condition_variable_any {
  public:
    condition_variable_any();
    ~condition_variable_any();
 
    condition_variable_any(const condition_variable_any&) = delete;
    condition_variable_any& operator=(const condition_variable_any&) = delete;
 
    void notify_one() noexcept;
    void notify_all() noexcept;
 
    // noninterruptible waits
    template<class Lock>
      void wait(Lock& lock);
    template<class Lock, class Pred>
      void wait(Lock& lock, Pred pred);
 
    template<class Lock, class Clock, class Duration>
      cv_status wait_until(Lock& lock,
                           const chrono::time_point<Clock, Duration>& abs_time);
    template<class Lock, class Clock, class Duration, class Pred>
      bool wait_until(Lock& lock, const chrono::time_point<Clock, Duration>& abs_time,
                      Pred pred);
    template<class Lock, class Rep, class Period>
      cv_status wait_for(Lock& lock, const chrono::duration<Rep, Period>& rel_time);
    template<class Lock, class Rep, class Period, class Pred>
      bool wait_for(Lock& lock, const chrono::duration<Rep, Period>& rel_time, Pred pred);
 
    // interruptible waits
    template<class Lock, class Pred>
      bool wait(Lock& lock, stop_token stoken, Pred pred);
    template<class Lock, class Clock, class Duration, class Pred>
      bool wait_until(Lock& lock, stop_token stoken,
                      const chrono::time_point<Clock, Duration>& abs_time, Pred pred);
    template<class Lock, class Rep, class Period, class Pred>
      bool wait_for(Lock& lock, stop_token stoken,
                    const chrono::duration<Rep, Period>& rel_time, Pred pred);
  };
}