std::shared_mutex:: try_lock_shared

bool try_lock_shared ( ) ;		(since C++17)

Tries to lock the mutex in shared mode. Returns immediately. On successful lock acquisition returns true , otherwise returns false .

This function is allowed to fail spuriously and return false even if the mutex is not currenly exclusively locked by any other thread.

A prior unlock() operation on the same mutex synchronizes-with (as defined in std::memory_order ) this operation if it returns true .

The behavior is undefined if the calling thread already owns the mutex in any mode.

Contents 1 Parameters 2 Return value 3 Exceptions 4 Example 5 See also

Parameters

(none)

Return value

true if the lock was acquired successfully, otherwise false .

Exceptions

Throws nothing.

Example

This section is incomplete Reason: no example

See also

lock	locks the mutex, blocks if the mutex is not available (public member function)
try_lock	tries to lock the mutex, returns if the mutex is not available (public member function)
unlock_shared	unlocks the mutex (shared ownership) (public member function)