pub trait MutexExtension {
fn is_locked(&self) -> bool;
}
pub trait RwLockExtension {
fn is_readable(&self) -> bool;
fn is_writeable(&self) -> bool;
}
pub fn foo(reference: &'static i8) {
assert_eq!(*reference, 42);
}
pub fn bar(reference: &'static mut i8) {
assert_eq!(*reference, 42);
*reference = 21;
assert_eq!(*reference, 21);
}