1// FIXME: Replace with `core::hint::{likely, unlikely}` once they are stable.
2#[cfg(feature = "nightly")]
3pub(crate) use core::intrinsics::{likely, unlikely};
4
5#[cfg(not(feature = "nightly"))]
6#[inline(always)]
7#[cold]
8fn cold_path() {}
9
10#[cfg(not(feature = "nightly"))]
11#[inline(always)]
12pub(crate) fn likely(b: bool) -> bool {
13 if b {
14 true
15 } else {
16 cold_path();
17 false
18 }
19}
20
21#[cfg(not(feature = "nightly"))]
22#[inline(always)]
23pub(crate) fn unlikely(b: bool) -> bool {
24 if b {
25 cold_path();
26 true
27 } else {
28 false
29 }
30}
31
32// FIXME: use strict provenance functions once they are stable.
33// Implement it with a transmute for now.
34#[inline(always)]
35#[allow(clippy::useless_transmute)] // clippy is wrong, cast and transmute are different here
36pub(crate) fn invalid_mut<T>(addr: usize) -> *mut T {
37 unsafe { core::mem::transmute(src:addr) }
38}
39