标准库头文件 <shared_mutex>
此头文件是线程支持库的一部分。
类 | |
(C++17) |
提供共享互斥设施 (类) |
(C++14) |
提供共享互斥设施并实现有时限锁定 (类) |
(C++14) |
实现可移动的共享互斥体所有权封装器 (类模板) |
函数 | |
(C++14) |
std::swap 对 shared_lock 的特化 (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; }
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(); }; }
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(); }; }
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() const noexcept; explicit operator bool () const noexcept; mutex_type* mutex() const noexcept; 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; }