so long as
1. Considering the fact that; seeing as; because. Hey, so long as you're going to the shop, would you mind picking me up a pack of gum? I suppose I might as well do a bit of work on my thesis so long as I've got the apartment to myself.
2. If it is the case that; provided that. Hey, so long as you get your homework finished and handed in on time, I don't care what kind of music you listen to. Okay, you can have one cookie before dinner so long as you don't spoil your appetite!