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标准库头文件 <thread>

此头文件是线程支持库的一部分。

类

(C++11)
 管理单独的线程
(类)
(C++20)
 有自动合并和取消支持的 std::thread
(类)

函数

(C++11)
 特化 std::swap 算法
(函数)
(C++20 中移除)(C++20 中移除)(C++20 中移除)(C++20 中移除)(C++20 中移除)(C++20)
 比较两个 thread::id 对象
(函数)
序列化 thread::id 对象
(函数模板)
特化 std::hash
(类模板特化)

命名空间

this_thread 提供访问当前执行线程的函数
函数
定义于命名空间 std::this_thread
(C++11)
 建议实现重新调度各执行线程
(函数)
(C++11)
 返回当前线程的线程 id
(函数)
(C++11)
 使当前线程的执行停止指定的时间段
(函数)
(C++11)
 使当前线程的执行停止直到指定的时间点
(函数)

概要

namespace std {
    class thread;
 
    void swap(thread& x, thread& y) noexcept;
 
    bool operator==(thread::id x, thread::id y) noexcept;
    bool operator!=(thread::id x, thread::id y) noexcept;
 
    bool operator<(thread::id x, thread::id y) noexcept;
    bool operator<=(thread::id x, thread::id y) noexcept;
    bool operator>(thread::id x, thread::id y) noexcept;
    bool operator>=(thread::id x, thread::id y) noexcept;
 
    template<class CharT, class Traits>
    basic_ostream<CharT, Traits>& operator<<(basic_ostream<CharT, Traits>& out,
                                            thread::id id);
 
    template <class T> struct hash;
    template <> struct hash<thread::id>;
 
    namespace this_thread {
 
        thread::id get_id() noexcept;
        void yield() noexcept;
        template <class Clock, class Duration>
            void sleep_until(const chrono::time_point<Clock, Duration>& abs_time);
        template <class Rep, class Period>
            void sleep_for(const chrono::duration<Rep, Period>& rel_time);
 
    }
}

类 std::thread

class thread {
 public:
    // 类型：
    class id;
    typedef /* 由实现定义 */ native_handle_type;
 
    // 构造/复制/销毁：
    thread() noexcept;
    template <class F, class ...Args> explicit thread(F&& f, Args&&... args);
    ~thread();
    thread(const thread&) = delete;
    thread(thread&&) noexcept;
    thread& operator=(const thread&) = delete;
    thread& operator=(thread&&) noexcept;
 
    // 成员：
    void swap(thread&) noexcept;
    bool joinable() const noexcept;
    void join();
    void detach();
    id get_id() const noexcept;
    native_handle_type native_handle();
 
    // 静态成员：
    static unsigned hardware_concurrency() noexcept;
};

类 std::jthread

namespace std {
    class jthread {
    public:
        // 类型
        using id = thread::id;
        using native_handle_type = thread::native_handle_type;
 
        // 构造函数、移动与赋值
        jthread() noexcept;
        template<class F, class... Args> explicit jthread(F&& f, Args&&... args);
        ~jthread();
        jthread(const jthread&) = delete;
        jthread(jthread&&) noexcept;
        jthread& operator=(const jthread&) = delete;
        jthread& operator=(jthread&&) noexcept;
 
        // 成员
        void swap(jthread&) noexcept;
        [[nodiscard]] bool joinable() const noexcept;
        void join();
        void detach();
        [[nodiscard]] id get_id() const noexcept;
        [[nodiscard]] native_handle_type native_handle();
 
        // 停止记号处理
        [[nodiscard]] stop_source get_stop_source() noexcept;
        [[nodiscard]] stop_token get_stop_token() const noexcept;
        bool request_stop() noexcept;
 
        // 特化的算法
        friend void swap(jthread& lhs, jthread& rhs) noexcept;
 
        // 静态成员
        [[nodiscard]] static unsigned int hardware_concurrency() noexcept;
 
    private:
        stop_source ssource;        // 仅用于阐释
    };
}

类 std::thread::id

class thread::id {
 public:
    id() noexcept;
};