linux - scripts/atomic/fallbacks/dec_unless

10 lines · 164 B

1	cat <<EOF
2	${int} c = raw_${atomic}_read(v);
3
4	do {
5	if (unlikely(c > 0))
6	return false;
7	} while (!raw_${atomic}_try_cmpxchg(v, &c, c - 1));
8
9	return true;
10	EOF