/
dragonfly.rs
27 lines (24 loc) · 1008 Bytes
/
dragonfly.rs
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// Copyright 2021 Developers of the Rand project.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Implementation for DragonFly BSD
use crate::{
use_file,
util_libc::{sys_fill_exact, Weak},
Error,
};
pub unsafe fn getrandom_inner(dst: *mut u8, len: usize) -> Result<(), Error> {
static GETRANDOM: Weak = unsafe { Weak::new("getrandom\0") };
type GetRandomFn = unsafe extern "C" fn(*mut u8, libc::size_t, libc::c_uint) -> libc::ssize_t;
// getrandom(2) was introduced in DragonflyBSD 5.7
if let Some(fptr) = GETRANDOM.ptr() {
let func: GetRandomFn = core::mem::transmute(fptr);
sys_fill_exact(dst, len, |cdst, clen| func(cdst, clen, 0))
} else {
use_file::getrandom_inner(dst, len)
}
}