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// 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 CloudABI
use crate::Error;
use core::num::NonZeroU32;
extern "C" {
fn cloudabi_sys_random_get(buf: *mut u8, buf_len: usize) -> u16;
}
pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
let errno = unsafe { cloudabi_sys_random_get(dest.as_mut_ptr(), dest.len()) };
if let Some(code) = NonZeroU32::new(errno as u32) {
error!("cloudabi_sys_random_get: failed with {}", errno);
Err(Error::from(code))
} else {
Ok(()) // Zero means success for CloudABI
}
}
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