71 pub struct ReadOnly<T: Copy>(T);
74 impl<T: Copy> ReadOnly<T> {
76     pub fn new(value: T) -> Self {  in new()
84 pub struct WriteOnly<T: Copy>(T);
89 pub struct Volatile<T: Copy>(T);
92 impl<T: Copy> Volatile<T> {
94     pub fn new(value: T) -> Self {  in new()
100 pub trait VolatileReadable<T> {
102     unsafe fn vread(self) -> T;  in vread()  argument
105 impl<T: Copy> VolatileReadable<T> for *const ReadOnly<T> {
106     unsafe fn vread(self) -> T {  in vread()  argument
111 impl<T: Copy> VolatileReadable<T> for *const Volatile<T> {
112     unsafe fn vread(self) -> T {  in vread()  argument
118 pub trait VolatileWritable<T> {
120     unsafe fn vwrite(self, value: T);  in vwrite()  argument
123 impl<T: Copy> VolatileWritable<T> for *mut WriteOnly<T> {
124     unsafe fn vwrite(self, value: T) {  in vwrite()  argument
125         (self as *mut T).write_volatile(value)  in vwrite()
129 impl<T: Copy> VolatileWritable<T> for *mut Volatile<T> {
130     unsafe fn vwrite(self, value: T) {  in vwrite()  argument
131         (self as *mut T).write_volatile(value)  in vwrite()