1 //! Implementation for WASI
2 use crate::Error;
3 use core::{
4     mem::MaybeUninit,
5     num::{NonZeroU16, NonZeroU32},
6 };
7 use wasi::random_get;
8 
getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error>9 pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
10     unsafe { random_get(dest.as_mut_ptr() as *mut u8, dest.len()) }.map_err(|e| {
11         // The WASI errno will always be non-zero, but we check just in case.
12         match NonZeroU16::new(e.raw()) {
13             Some(r) => Error::from(NonZeroU32::from(r)),
14             None => Error::ERRNO_NOT_POSITIVE,
15         }
16     })
17 }
18