(&mut self, offset: usize)
| 42 | } |
| 43 | |
| 44 | pub fn get_mut<T>(&mut self, offset: usize) -> &mut T |
| 45 | where |
| 46 | T: Sized, |
| 47 | { |
| 48 | let type_size = core::mem::size_of::<T>(); |
| 49 | assert!(offset + type_size <= BLOCK_SZ); |
| 50 | self.modified = true; |
| 51 | let addr = self.addr_of_offset(offset); |
| 52 | unsafe { &mut *(addr as *mut T) } |
| 53 | } |
| 54 | |
| 55 | pub fn read<T, V>(&self, offset: usize, f: impl FnOnce(&T) -> V) -> V { |
| 56 | f(self.get_ref(offset)) |