NAME¶

std::counting_semaphore::try_acquire - std::counting_semaphore::try_acquire

Synopsis¶

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.