NAME

std::latch::arrive_and_wait - std::latch::arrive_and_wait

Synopsis

void arrive_and_wait( std::ptrdiff_t n = 1 ); (since C++20)

Atomically decrements the internal counter by n and (if necessary) blocks the
calling thread until the counter reaches zero. Equivalent to count_down(n); wait();.

If n is greater than the value of the internal counter or is negative, the behavior
is undefined.

Parameters

n - the value by which the internal counter is decreased

Return value

(none)

Exceptions

Throws std::system_error with an error code allowed for mutex types on error.