| //! 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(()) |
| } |