1 //! Implementation for DragonFly BSD
2 use crate::{
3 use_file,
4 util_libc::{sys_fill_exact, Weak},
5 Error,
6 };
7 use core::mem::MaybeUninit;
8
getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error>9 pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
10 static GETRANDOM: Weak = unsafe { Weak::new("getrandom\0") };
11 type GetRandomFn = unsafe extern "C" fn(*mut u8, libc::size_t, libc::c_uint) -> libc::ssize_t;
12
13 // getrandom(2) was introduced in DragonflyBSD 5.7
14 if let Some(fptr) = GETRANDOM.ptr() {
15 let func: GetRandomFn = unsafe { core::mem::transmute(fptr) };
16 return sys_fill_exact(dest, |buf| unsafe {
17 func(buf.as_mut_ptr() as *mut u8, buf.len(), 0)
18 });
19 } else {
20 use_file::getrandom_inner(dest)
21 }
22 }
23