| // Copyright 2018 Developers of the Rand project. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| //! Implementation for WASI |
| use crate::Error; |
| use core::{ |
| mem::MaybeUninit, |
| num::{NonZeroU16, NonZeroU32}, |
| }; |
| use wasi::random_get; |
| |
| pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> { |
| unsafe { random_get(dest.as_mut_ptr() as *mut u8, dest.len()) }.map_err(|e| { |
| // The WASI errno will always be non-zero, but we check just in case. |
| match NonZeroU16::new(e.raw()) { |
| Some(r) => Error::from(NonZeroU32::from(r)), |
| None => Error::ERRNO_NOT_POSITIVE, |
| } |
| }) |
| } |
