2.3 KiB
[thread.sharedmutex.class]
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; // exclusive ownershipvoid lock(); // blockingbool try_lock(); void unlock(); // shared ownershipvoid lock_shared(); // blockingbool try_lock_shared(); void unlock_shared(); using native_handle_type = implementation-defined; // see [thread.req.native] native_handle_type native_handle(); // see [thread.req.native]};}
The class shared_mutex provides a non-recursive mutex with shared ownership semantics.
The class shared_mutex meets all of the shared mutex requirements ([thread.sharedmutex.requirements]).
It is a standard-layout class ([class.prop]).
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.