| Joel Galenson | 4be0c6d | 2020-07-07 13:20:14 -0700 | [diff] [blame] | 1 | // Copyright 2018 Developers of the Rand project. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| 4 | // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| 5 | // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your |
| 6 | // option. This file may not be copied, modified, or distributed |
| 7 | // except according to those terms. |
| 8 | |
| 9 | //! Implementation for CloudABI |
| 10 | use crate::Error; |
| 11 | use core::num::NonZeroU32; |
| 12 | |
| 13 | extern "C" { |
| 14 | fn cloudabi_sys_random_get(buf: *mut u8, buf_len: usize) -> u16; |
| 15 | } |
| 16 | |
| 17 | pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> { |
| 18 | let errno = unsafe { cloudabi_sys_random_get(dest.as_mut_ptr(), dest.len()) }; |
| 19 | if let Some(code) = NonZeroU32::new(errno as u32) { |
| 20 | error!("cloudabi_sys_random_get: failed with {}", errno); |
| 21 | Err(Error::from(code)) |
| 22 | } else { |
| 23 | Ok(()) // Zero means success for CloudABI |
| 24 | } |
| 25 | } |