i = 0
switch (i)
{
case 0: if Init1() i++ else break;
case 1: if Init2() i++ else break;
case 2: if Init3() i++ else break;
case 3: if Init4() i++ else break;
};

if i < 4
switch (i)
{
case 3: Uninit3(); i--;
case 2: Uninit2(); i--;
case 1: Uninit1();
}
else
ok