std::experimental::latch::count_down (3) Linux Manual Page

std::experimental::latch::count_down – std::experimental::latch::count_down

Synopsis

void count_down(ptrdiff_t n = 1);
(1)(concurrency TS)

Atomically decrements the internal counter by n without blocking the caller.
If n is greater than the value of the internal counter or is negative, the behavior is undefined.
This operation synchronizes_with all calls that block on this latch and all is_ready calls on this latch that returns true.

Parameters

n – the value by which the internal counter is decreased

Return value

(none)

Exceptions

Throws nothing.