33 Concurrency support library [thread]

33.6 Mutual exclusion [thread.mutex]

33.6.4 Mutex requirements [thread.mutex.requirements]

33.6.4.5 Shared timed mutex types [thread.sharedtimedmutex.requirements]

33.6.4.5.2 Class shared_­timed_­mutex [thread.sharedtimedmutex.class]

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; // exclusive ownership void lock(); // blocking 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(); // shared ownership void lock_shared(); // blocking 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(); }; }
The class shared_­timed_­mutex provides a non-recursive mutex with shared ownership semantics.
The class shared_­timed_­mutex meets all of the shared timed mutex requirements ([thread.sharedtimedmutex.requirements]).
It is a standard-layout class ([class.prop]).
The behavior of a program is undefined if:
  • it destroys a shared_­timed_­mutex object owned by any thread,
  • a thread attempts to recursively gain any ownership of a shared_­timed_­mutex, or
  • a thread terminates while possessing any ownership of a shared_­timed_­mutex.