jemalloc_Arena.java

class Arena {
  List<Thread> threads; // Threads that this arena is associated with
  List<Chunk> chunks; // Chunks that this arena manages  
  Lock lock; // guard accesses to various things in this arena.
  RBTree<Run> runsAvailClean; // let's talk about runs in a little bit.
  // clean vs dirty = free zeroed data (calloc) vs free dirty data (malloc).
  RBTree<Run> runsAvailDirty;
  List<Bin> bins; // we will look at Bins soon.
}