30 Thread support library [thread]

30.4 Mutual exclusion [thread.mutex]

30.4.1 Mutex requirements [thread.mutex.requirements]

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

30.4.1.4.1 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 shall satisfy all of the SharedTimedMutex requirements ([thread.sharedtimedmutex.requirements]). It shall be a standard-layout class (Clause [class]).

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.