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std::counting_semaphore<LeastMaxValue>::~counting_semaphore

From cppreference.com
 
 
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~counting_semaphore();
(since C++20)

Destroys the counting_semaphore object.

The behavior is undefined if any thread is concurrently calling any other member function on this semaphore. This includes threads blocked in acquire(), try_acquire_for(), or try_acquire_until().