std::counting_semaphore<LeastMaxValue>::try_acquire_for

template< class Rep, class Period >
bool try_acquire_for( const std::chrono::duration<Rep, Period>& rel_time );

(since C++20)

Tries to atomically decrement the internal counter by 1 if it is greater than 0; otherwise blocks until it is greater than 0 and can successfully decrement the internal counter, or the rel_time duration has been exceeded.

Preconditions

(none)

Parameters

rel_time

the minimum duration the function must wait for it to fail

Return value

true if it decremented the internal counter, otherwise false.

Exceptions

May throw std::system_error or a timeout-related exception.

Notes

In practice the function may take longer than rel_time to fail.

release	increments the internal counter and unblocks acquirers (public member function)
acquire	decrements the internal counter or blocks until it can (public member function)
try_acquire	tries to decrement the internal counter without blocking (public member function)
try_acquire_until	tries to decrement the internal counter, blocking until a point in time (public member function)