1cat <<EOF
2static inline bool
3${atomic}_dec_unless_positive(${atomic}_t *v)
4{
5	${int} c = ${atomic}_read(v);
6
7	do {
8		if (unlikely(c > 0))
9			return false;
10	} while (!${atomic}_try_cmpxchg(v, &c, c - 1));
11
12	return true;
13}
14EOF
15