| use crate::mem; |
| use crate::slice; |
| |
| pub fn hashmap_random_keys() -> (u64, u64) { |
| let mut v = (0, 0); |
| unsafe { |
| let view = slice::from_raw_parts_mut(&mut v as *mut _ as *mut u8, mem::size_of_val(&v)); |
| imp::fill_bytes(view); |
| } |
| return v; |
| } |
| |
| mod imp { |
| use crate::io; |
| use core::sync::atomic::{AtomicBool, Ordering::Relaxed}; |
| use libc; |
| |
| pub fn fill_bytes(v: &mut [u8]) { |
| static RNG_INIT: AtomicBool = AtomicBool::new(false); |
| while !RNG_INIT.load(Relaxed) { |
| let ret = unsafe { libc::randSecure() }; |
| if ret < 0 { |
| panic!("couldn't generate random bytes: {}", io::Error::last_os_error()); |
| } else if ret > 0 { |
| RNG_INIT.store(true, Relaxed); |
| break; |
| } |
| unsafe { libc::usleep(10) }; |
| } |
| let ret = unsafe { |
| libc::randABytes(v.as_mut_ptr() as *mut libc::c_uchar, v.len() as libc::c_int) |
| }; |
| if ret < 0 { |
| panic!("couldn't generate random bytes: {}", io::Error::last_os_error()); |
| } |
| } |
| } |