a->Lock();
b->Lock();
        for(int i = 0; i < 9999; ++i)
        {
            bool skip = false;

            for(int j = 0; j < 9999; ++j)
            {
                if(/* Test Some Condition To Skip Involving Object a and b*/)
                {
                    skip = true;
                    break;

                }

            }

            if(skip) continue;

            // Do Something Important Here

        }
b->Unlock();
a->Unlock();