标准库标头 <shared_mutex> (C++14)

 

C++

编译器支持

自立实现与有宿主实现

语言

标准库

标准库标头

具名要求

功能特性测试宏(C++20)

语言支持库

概念库(C++20)

诊断库

内存管理库

元编程库(C++11)

通用工具库

容器库

迭代器库

范围库(C++20)

算法库

字符串库

文本处理库

数值库

日期和时间库

输入/输出库

文件系统库(C++17)

并发支持库(C++11)

执行控制库(C++26)

技术规范

符号索引

外部库

 

标准库头

语言支持 <cfloat> <climits> <compare>(C++20) <contracts>(C++26) <coroutine>(C++20) <csetjmp> <csignal> <cstdarg> <cstddef> <cstdint>(C++11) <cstdlib> <exception> <initializer_list>(C++11)    <limits> <new> <source_location>(C++20) <stdfloat>(C++23) <typeinfo> <version>(C++20) 概念 <concepts>(C++20) 诊断 <cassert> <cerrno> <debugging>(C++26) <stacktrace>(C++23) <stdexcept> <system_error>(C++11) 内存管理 <memory> <memory_resource>(C++17) <scoped_allocator>(C++11) 元编程 <type_traits>(C++11) <ratio>(C++11)

通用工具 <any>(C++17) <bitset> <bit>(C++20) <charconv>(C++17) <expected>(C++23) <format>(C++20) <functional> <optional>(C++17) <stdbit.h>(C++26) <tuple>(C++11) <typeindex>(C++11) <utility> <variant>(C++17) 容器 <array>(C++11) <deque> <flat_map>(C++23) <flat_set>(C++23) <forward_list>(C++11) <hive>(C++26) <inplace_vector>(C++26)    <list> <map> <mdspan>(C++23) <queue> <set> <span>(C++20) <stack> <unordered_map>(C++11) <unordered_set>(C++11) <vector> 迭代器 <iterator> 范围 <generator>(C++23) <ranges>(C++20)

算法 <algorithm> <numeric> 字符串 <cctype> <cstring> <cuchar>(C++11) <cwchar> <cwctype> <string_view>(C++17) <string> 文本处理 <clocale> <codecvt>(C++11/17/26*) <locale> <regex>(C++11) <text_encoding>(C++26)    cpp/header#数值库数值 <cfenv>(C++11) <cmath> <complex> <linalg>(C++26) <numbers>(C++20) <random>(C++11) <simd>(C++26) <stdckdint.h>(C++26) <valarray> 时间 <chrono>(C++11) <ctime> C 兼容性 <ccomplex>(C++11/17/20*) <ciso646>(C++20 前) <cstdalign>(C++11/17/20*) <cstdbool>(C++11/17/20*) <ctgmath>(C++11/17/20*)

输入/输出 <cinttypes>(C++11) <cstdio> <filesystem>(C++17) <fstream> <iomanip> <iosfwd> <iostream> <ios> <istream> <ostream> <print>(C++23) <spanstream>(C++23) <sstream> <streambuf> <strstream>(C++98/26*) <syncstream>(C++20) 并发支持 <atomic>(C++11) <barrier>(C++20) <condition_variable>(C++11) <future>(C++11) <hazard_pointer>(C++26) <latch>(C++20) <mutex>(C++11) <rcu>(C++26) <semaphore>(C++20) <shared_mutex>(C++14) <stdatomic.h>(C++23) <stop_token>(C++20) <thread>(C++11) 执行支持 <execution>(C++17)

 

此头文件是线程支持库的一部分。

类
shared_mutex (C++17)	提供共享互斥设施 (类)
shared_timed_mutex (C++14)	提供共享互斥设施并实现有时限锁定 (类)
shared_lock (C++14)	实现可移动的共享互斥体所有权封装器 (类模板)
函数
std::swap(std::shared_lock) (C++14)	特化 std::swap 算法 (函数模板)

概要

namespace std {class shared_mutex;class shared_timed_mutex;template<class Mutex>class shared_lock;template<class Mutex>void swap(shared_lock<Mutex>& x, shared_lock<Mutex>& y)noexcept;}

类 std::shared_mutex

namespace std {class shared_mutex {public: shared_mutex(); ~shared_mutex();   shared_mutex(const shared_mutex&)= delete; shared_mutex& operator=(const shared_mutex&)= delete;   // 排他性所有权void lock();// 阻塞bool try_lock();void unlock();   // 共享所有权void lock_shared();// 阻塞bool try_lock_shared();void unlock_shared();   using native_handle_type =/* 由实现定义 */; native_handle_type native_handle();};}

类 std::shared_timed_mutex

namespace std {class shared_timed_mutex {public: shared_timed_mutex(); ~shared_timed_mutex();   shared_timed_mutex(const shared_timed_mutex&)= delete; shared_timed_mutex& operator=(const shared_timed_mutex&)= delete;   // 排他性所有权void lock();// 阻塞bool try_lock();template<class Rep, class Period>bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);template<class Clock, class Duration>bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);void unlock();   // 共享所有权void lock_shared();// 阻塞bool try_lock_shared();template<class Rep, class Period>bool try_lock_shared_for(const chrono::duration<Rep, Period>& rel_time);template<class Clock, class Duration>bool try_lock_shared_until(const chrono::time_point<Clock, Duration>& abs_time);void unlock_shared();};}

类模板 std::shared_lock

namespace std {template<class Mutex>class shared_lock {public:using mutex_type = Mutex;   // 构造/复制/析构 shared_lock()noexcept;explicit shared_lock(mutex_type& m);// 阻塞 shared_lock(mutex_type& m, defer_lock_t)noexcept; shared_lock(mutex_type& m, try_to_lock_t); shared_lock(mutex_type& m, adopt_lock_t);template<class Clock, class Duration> shared_lock(mutex_type& m, const chrono::time_point<Clock, Duration>& abs_time);template<class Rep, class Period> shared_lock(mutex_type& m, const chrono::duration<Rep, Period>& rel_time); ~shared_lock();   shared_lock(const shared_lock&)= delete; shared_lock& operator=(const shared_lock&)= delete;   shared_lock(shared_lock&& u)noexcept; shared_lock& operator=(shared_lock&& u)noexcept;   // 锁定void lock();// 阻塞bool try_lock();template<class Rep, class Period>bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);template<class Clock, class Duration>bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);void unlock();   // 修改器void swap(shared_lock& u)noexcept; mutex_type* release()noexcept;   // 观察器bool owns_lock()constnoexcept;explicit operator bool()constnoexcept; mutex_type* mutex()constnoexcept;   private: mutex_type* pm;// 仅用于阐释bool owns;// 仅用于阐释};   template<class Mutex>void swap(shared_lock<Mutex>& x, shared_lock<Mutex>& y)noexcept;}