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" {
cloudabi_sys_random_get(buf: *mut u8, buf_len: usize) -> u1614 fn cloudabi_sys_random_get(buf: *mut u8, buf_len: usize) -> u16;
15 }
16
getrandom_inner(dest: &mut [u8]) -> Result<(), Error>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 }
26