1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
use std::fmt;
use std::ptr::copy;
use std::mem::{ uninitialized, size_of };
use memsec::{ memcmp, mlock, munlock };
pub struct Key<T: Sized>(pub T);
impl<T> Key<T> where T: Sized {
pub fn new(t: &T) -> Key<T> {
let mut memo = unsafe { uninitialized() };
unsafe {
mlock(&mut memo, size_of::<T>());
copy(t, &mut memo, 1);
}
Key(memo)
}
}
impl<T> From<T> for Key<T> {
#[inline]
fn from(mut t: T) -> Key<T> {
unsafe { mlock(&mut t, size_of::<T>()) };
Key(t)
}
}
impl<T> fmt::Debug for Key<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", "** tmp key **")
}
}
impl<T: Sized> PartialEq<T> for Key<T> {
fn eq(&self, rhs: &T) -> bool {
unsafe { memcmp(&self.0, rhs, size_of::<T>()) == 0 }
}
}
impl<T: Sized> PartialEq<Key<T>> for Key<T> {
fn eq(&self, &Key(ref rhs): &Key<T>) -> bool {
self == rhs
}
}
impl<T: Sized> Eq for Key<T> {}
impl<T> Drop for Key<T> where T: Sized {
fn drop(&mut self) {
unsafe { munlock(&mut self.0, size_of::<T>()) };
}
}