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path: root/scripts/atomic/fallbacks/dec_unless_positive
blob: dcab6848ca1e5a2535c0a144cf7cb4af4d8a3e52 (plain)
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cat <<EOF
static __always_inline bool
${arch}${atomic}_dec_unless_positive(${atomic}_t *v)
{
	${int} c = ${arch}${atomic}_read(v);

	do {
		if (unlikely(c > 0))
			return false;
	} while (!${arch}${atomic}_try_cmpxchg(v, &c, c - 1));

	return true;
}
EOF