std::counting_semaphore<LeastMaxValue>::try_acquire

< cpp‎ | thread‎ | counting semaphore

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.

Return value

true if it decremented the internal counter, otherwise false

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.