std::unique_lock::operator bool - cppreference.com

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# std::unique_lock::operator bool

From cppreference.com
< cpp‎ | thread‎ | unique lock

explicit operator bool() const; |  | (since C++11)

Checks whether *this owns a locked mutex or not. Effectively calls owns_lock().

### [edit] Parameters

(none)

### [edit] Return value

true if *this has an associated mutex and has acquired ownership of it, false otherwise.

### [edit] Exceptions

`noexcept` specification:
noexcept

### [edit] See also

owns_lock | tests whether the lock owns its associated mutex (public member function) [edit]

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