/// Cook a cookie for use
///
/// \param result ref to memory cell that receives cookie if status is
/// success
///
/// \note this call should be a pretty rare because it actually does
/// lookup for an entry in database
Status cook(const Slice &name, Cookie &cookie)
{
Status s;
assert( !name.empty() );
std::string v;
s = meta.Get(name, v);
if (s.ok())
{
if (Cookie::corrupted(v))
{ return Status::Corruption("Invalid sandwich mapping entry"); }
cookie = v;
return s;
}
else if (s.IsNotFound())
{
Cookie nextCookie;
s = seq.Next(nextCookie);
if (s.ok() && nextCookie == 0) s = seq.Next(nextCookie); // skip meta part
if (s.ok()) s = meta.Put(name, nextCookie);
if (s.ok()) cookie = nextCookie;
return s;
}
else
{ return s; }
}
