std::shared_lock<Mutex>::operator bool
From cppreference.com
< cpp | thread | shared lock
C++
Feature test macros (C++20)
Concepts library (C++20)
Metaprogramming library (C++11)
Ranges library (C++20)
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Concurrency support library
(C++11)
(C++20)
(C++11)
(C++11)
(C++20)
(C++26)
(C++26)
(C++20)
(C++26)
(C++20)
(C++26)
(C++26)
(C++26)
(C++26)
(C++26)
(C++26)
(C++11)
(C++11)
(C++17)
(C++11)
(C++14)
(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)(C++11)(C++11)(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++20)(C++20)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++26)
(C++26)
(C++26)
(C++11)
(C++20)
(C++11)
(C++11)(deprecated in C++20)
(C++11)(deprecated in C++20)
(C++11)
(C++11)
(C++11)(deprecated in C++26)
(C++11)
(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)
(C++26)(C++26)
(C++26)(C++26)
(C++11)
(C++20)(C++20)
(C++20)
(C++20)
(C++11)(C++11)
(C++11)(C++11)
(C++20)(C++20)
(C++20)(C++20)
(C++20)
(C++20)
std::shared_lock
Member functions
Shared locking
Modifiers
Observers
shared_lock::operator bool
Non-member functions
explicit operator bool() const noexcept;
(since C++14)
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 shared ownership of it, false otherwise.