30 lines
885 B
Rust
30 lines
885 B
Rust
//! Implementation for VxWorks
|
|
use crate::{util_libc::last_os_error, Error};
|
|
use core::{
|
|
mem::MaybeUninit,
|
|
sync::atomic::{AtomicBool, Ordering::Relaxed},
|
|
};
|
|
|
|
pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
|
|
static RNG_INIT: AtomicBool = AtomicBool::new(false);
|
|
while !RNG_INIT.load(Relaxed) {
|
|
let ret = unsafe { libc::randSecure() };
|
|
if ret < 0 {
|
|
return Err(Error::VXWORKS_RAND_SECURE);
|
|
} else if ret > 0 {
|
|
RNG_INIT.store(true, Relaxed);
|
|
break;
|
|
}
|
|
unsafe { libc::usleep(10) };
|
|
}
|
|
|
|
// Prevent overflow of i32
|
|
for chunk in dest.chunks_mut(i32::max_value() as usize) {
|
|
let ret = unsafe { libc::randABytes(chunk.as_mut_ptr() as *mut u8, chunk.len() as i32) };
|
|
if ret != 0 {
|
|
return Err(last_os_error());
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|