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//! Implementation using getentropy(2)
//!
//! Available since:
//! - macOS 10.12
//! - OpenBSD 5.6
//! - Emscripten 2.0.5
//! - vita newlib since Dec 2021
//!
//! For these targets, we use getentropy(2) because getrandom(2) doesn't exist.
use crate::Error;
use core::{ffi::c_void, mem::MaybeUninit};
pub use crate::util::{inner_u32, inner_u64};
#[path = "../util_libc.rs"]
mod util_libc;
pub fn fill_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
for chunk in dest.chunks_mut(256) {
let ret = unsafe { libc::getentropy(chunk.as_mut_ptr().cast::<c_void>(), chunk.len()) };
if ret != 0 {
return Err(util_libc::last_os_error());
}
}
Ok(())
}