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std::counting_semaphore<LeastMaxValue>::try_acquire

From cppreference.com
 
 
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bool try_acquire() noexcept;
(since C++20)

Tries to atomically decrement the internal counter by 1 if it is greater than 0; no blocking occurs regardless.

[edit] Return value

true if it decremented the internal counter, otherwise false.

[edit] Notes

Implementations are allowed to fail to decrement the counter even if it was greater than 0 - i.e., they are allowed to spuriously fail and return false.

[edit] See also

increments the internal counter and unblocks acquirers
(public member function) [edit]
decrements the internal counter or blocks until it can
(public member function) [edit]
tries to decrement the internal counter, blocking for up to a duration time
(public member function) [edit]
tries to decrement the internal counter, blocking until a point in time
(public member function) [edit]