Struct pancake_engine_ssi::ds_n_a::send_ptr::NonNullSendPtr
source · pub struct NonNullSendPtr<T>(NonNull<T>);Expand description
Tuple Fields§
§0: NonNull<T>Implementations§
Methods from Deref<Target = NonNull<T>>§
1.25.0 · sourcepub unsafe fn as_ref<'a>(&self) -> &'a T
pub unsafe fn as_ref<'a>(&self) -> &'a T
Returns a shared reference to the value. If the value may be uninitialized, as_uninit_ref
must be used instead.
For the mutable counterpart see as_mut.
Safety
When calling this method, you have to ensure that all of the following is true:
-
The pointer must be properly aligned.
-
It must be “dereferenceable” in the sense defined in the module documentation.
-
The pointer must point to an initialized instance of
T. -
You must enforce Rust’s aliasing rules, since the returned lifetime
'ais arbitrarily chosen and does not necessarily reflect the actual lifetime of the data. In particular, while this reference exists, the memory the pointer points to must not get mutated (except insideUnsafeCell).
This applies even if the result of this method is unused! (The part about being initialized is not yet fully decided, but until it is, the only safe approach is to ensure that they are indeed initialized.)
Examples
use std::ptr::NonNull;
let mut x = 0u32;
let ptr = NonNull::new(&mut x as *mut _).expect("ptr is null!");
let ref_x = unsafe { ptr.as_ref() };
println!("{ref_x}");