linux - scripts/atomic/fallbacks/dec_if

11 lines · 176 B

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