[thread.sharedmutex.class] (original) (raw)

32 Concurrency support library [thread]

32.6 Mutual exclusion [thread.mutex]

32.6.4 Mutex requirements [thread.mutex.requirements]

32.6.4.4 Shared mutex types [thread.sharedmutex.requirements]

32.6.4.4.2 Class shared_mutex [thread.sharedmutex.class]

namespace std { class shared_mutex { public: shared_mutex();~shared_mutex(); shared_mutex(const shared_mutex&) = delete; shared_mutex& operator=(const shared_mutex&) = delete;void lock(); bool try_lock();void unlock();void lock_shared(); bool try_lock_shared();void unlock_shared();using native_handle_type = implementation-defined; native_handle_type native_handle(); };}

The class shared_mutex provides a non-recursive mutex with shared ownership semantics.

The behavior of a program is undefined if

• it destroys a shared_mutex object owned by any thread,
• a thread attempts to recursively gain any ownership of a shared_mutex, or
• a thread terminates while possessing any ownership of a shared_mutex.

shared_mutex may be a synonym for shared_timed_mutex.