405     pub size: usize,  field
413         size: 0,
417     pub fn new(base: PhysAddr, size: usize, flags: MemoryAreaAttr) -> Self {  in new()
418         Self { base, size, flags }  in new()
430         return PhysAddr::new((self.base.data() + self.size) & !(MMArch::PAGE_SIZE - 1));  in area_end_aligned()
707     size: usize,  field
713     pub fn new(start: VirtAddr, size: usize) -> Self {  in new()
714         VirtRegion { start, size }  in new()
726         return self.start().add(self.size);  in end()
736         let size = end.data() - start.data();  in between()  localVariable
737         return Some(VirtRegion::new(start, size));  in between()
756     pub fn size(&self) -> usize {  in size()  method
757         self.size  in size()
762     pub fn set_size(&mut self, size: usize) {  in set_size()
763         self.size = size;  in set_size()
769         self.size == 0  in is_empty()
775         return VirtRegion::new(self.start, round_up_to_page_size(self.size));  in round_up_size_to_page()
852 pub fn verify_area(addr: VirtAddr, size: usize) -> Result<(), SystemError> {  in verify_area()
853     let end = addr.add(size);  in verify_area()