18     fn is_allocated(&self, idx: usize) -> bool;  in is_allocated()
19     fn set_bit(&self, idx: usize);  in set_bit()
20     fn clear_bit(&self, idx: usize);  in clear_bit()
46         for idx in 0..relevant_bits {  in initialize()
47             self.clear_bit(idx);  in initialize()
72                 let idx: usize = base_idx * 64 + first_free;  in first_fit()  localVariable
73                 let offset = idx * layout.size();  in first_fit()
86                     return Some((idx, addr));  in first_fit()
95     fn is_allocated(&self, idx: usize) -> bool {  in is_allocated()
96         let base_idx = idx / 64;  in is_allocated()
97         let bit_idx = idx % 64;  in is_allocated()
103     fn set_bit(&self, idx: usize) {  in set_bit()
104         let base_idx = idx / 64;  in set_bit()
105         let bit_idx = idx % 64;  in set_bit()
111     fn clear_bit(&self, idx: usize) {  in clear_bit()
112         let base_idx = idx / 64;  in clear_bit()
113         let bit_idx = idx % 64;  in clear_bit()
139         for (idx, bitmap) in self.iter().enumerate() {  in all_free()
140             let checking_bit_range = (idx * 64, (idx + 1) * 64);  in all_free()
220             Some((idx, addr)) => {  in allocate()
221                 self.bitfield().set_bit(idx);  in allocate()
248         let idx = page_offset / layout.size();  in deallocate()  localVariable
250             self.bitfield().is_allocated(idx),  in deallocate()
255         self.bitfield().clear_bit(idx);  in deallocate()