1b8a62b91Sopenharmony_ci/// Convert a `&T` into a `*const T` without using an `as`. 2b8a62b91Sopenharmony_ci#[inline] 3b8a62b91Sopenharmony_ci#[allow(dead_code)] 4b8a62b91Sopenharmony_cipub(crate) const fn as_ptr<T>(t: &T) -> *const T { 5b8a62b91Sopenharmony_ci t 6b8a62b91Sopenharmony_ci} 7b8a62b91Sopenharmony_ci 8b8a62b91Sopenharmony_ci/// Convert a `&mut T` into a `*mut T` without using an `as`. 9b8a62b91Sopenharmony_ci#[inline] 10b8a62b91Sopenharmony_ci#[allow(dead_code)] 11b8a62b91Sopenharmony_cipub(crate) fn as_mut_ptr<T>(t: &mut T) -> *mut T { 12b8a62b91Sopenharmony_ci t 13b8a62b91Sopenharmony_ci} 14b8a62b91Sopenharmony_ci 15b8a62b91Sopenharmony_ci/// Convert a `*mut c_void` to a `*mut T`, checking that it is not null, 16b8a62b91Sopenharmony_ci/// misaligned, or pointing to a region of memory that wraps around the address 17b8a62b91Sopenharmony_ci/// space. 18b8a62b91Sopenharmony_ci#[allow(dead_code)] 19b8a62b91Sopenharmony_cipub(crate) fn check_raw_pointer<T>(value: *mut core::ffi::c_void) -> Option<core::ptr::NonNull<T>> { 20b8a62b91Sopenharmony_ci if (value as usize) 21b8a62b91Sopenharmony_ci .checked_add(core::mem::size_of::<T>()) 22b8a62b91Sopenharmony_ci .is_none() 23b8a62b91Sopenharmony_ci || (value as usize) % core::mem::align_of::<T>() != 0 24b8a62b91Sopenharmony_ci { 25b8a62b91Sopenharmony_ci return None; 26b8a62b91Sopenharmony_ci } 27b8a62b91Sopenharmony_ci 28b8a62b91Sopenharmony_ci core::ptr::NonNull::new(value.cast()) 29b8a62b91Sopenharmony_ci} 30