Function cpuset_shadow

freebsd/kern/kern_cpuset.c:996–1026

* Create an anonymous set with the provided mask in the space provided by * 'nset'. If the passed in set is anonymous we use its parent otherwise * the new set is a child of 'set'. */

 * the new set is a child of 'set'.
 */
static int
cpuset_shadow(struct cpuset *set, struct cpuset **nsetp,
   const cpuset_t *mask, const struct domainset *domain,
   struct setlist *cpusets, struct domainlist *domains)
{
	struct cpuset *parent;
	struct cpuset *nset;
	struct domainset *dset;
	struct domainset *d;
	int error;

	error = cpuset_testshadow(set, mask, domain);
	if (error)
		return (error);

	parent = cpuset_getbase(set);
	dset = parent->cs_domain;
	if (mask == NULL)
		mask = &set->cs_mask;
	if (domain != NULL)
		d = domainset_shadow(dset, domain, domains);
	else
		d = set->cs_domain;
	nset = LIST_FIRST(cpusets);
	error = cpuset_init(nset, parent, mask, d, CPUSET_INVALID);
	if (error == 0) {
		LIST_REMOVE(nset, cs_link);
		*nsetp = nset;
	}
	return (error);
}

static struct cpuset *
cpuset_update_thread(struct thread *td, struct cpuset *nset)