Function cpuset_setproc_setthread_mask

freebsd/kern/kern_cpuset.c:1071–1103

}

static int
cpuset_setproc_setthread_mask(struct cpuset *tdset, struct cpuset *set,
    cpuset_t *mask, struct domainset *domain)
{
	struct cpuset *parent;

	parent = cpuset_getbase(tdset);

	/*
	 * If the thread restricted its mask then apply that same
	 * restriction to the new set, otherwise take it wholesale.
	 */
	if (CPU_CMP(&tdset->cs_mask, &parent->cs_mask) != 0) {
		CPU_COPY(&tdset->cs_mask, mask);
		CPU_AND(mask, &set->cs_mask);
	} else
		CPU_COPY(&set->cs_mask, mask);

	/*
	 * If the thread restricted the domain then we apply the
	 * restriction to the new set but retain the policy.
	 */
	if (tdset->cs_domain != parent->cs_domain) {
		domainset_copy(tdset->cs_domain, domain);
		DOMAINSET_AND(&domain->ds_mask, &set->cs_domain->ds_mask);
	} else
		domainset_copy(set->cs_domain, domain);

	if (CPU_EMPTY(mask) || DOMAINSET_EMPTY(&domain->ds_mask))
		return (EDEADLK);

	return (0);
}

static int
cpuset_setproc_test_setthread(struct cpuset *tdset, struct cpuset *set)