recursive_mutex::try_lock Method
Attempts to obtain ownership of the mutex without blocking.
bool try_lock() _NOEXCEPT;
Return Value
true if the method successfully obtains ownership of the mutex or if the calling thread already owns the mutex; otherwise, false.
Remarks
If the calling thread already owns the mutex, the function immediately returns true, and the previous lock remains in effect.
Requirements
Header: mutex
Namespace: std