private void setSizeAndPreviousInUseOfInUseChunk(int p, int s) {
    head(p, s | PINUSE_BIT | CINUSE_BIT);
    setFoot(p, s);
    occupied += s;
  }
private void setSizeAndPreviousInUseOfInUseChunk ( int p , int s ) { head ( p , s | PINUSE_BIT | CINUSE_BIT ) ; setFoot ( p , s ) ; occupied += s ; }
/* Set size, cinuse and pinuse bit of this chunk