physical_IsSet
return c->argptr && physical_IsSet(&c->physical->desc, fdset);
result += physical_IsSet(d, fdset);
if (physical_IsSet(d, fdset))
result += physical_IsSet(d, fdset);
result += physical_IsSet(d, fdset);
if (physical_IsSet(d, fdset))
p->desc.IsSet = physical_IsSet;
p->desc.IsSet = physical_IsSet;
extern int physical_IsSet(struct fdescriptor *, const fd_set *);