}
#[allow(dead_code)]
pub unsafe fn sigaddset(set: *mut libc::sigset_t, signum: libc::c_int) -> libc::c_int {
- use crate::{slice, mem};
+ use crate::{
+ mem::{align_of, size_of},
+ slice,
+ };
+ use libc::{c_ulong, sigset_t};
+
+ // The implementations from bionic (android libc) type pun `sigset_t` as an
+ // array of `c_ulong`. This works, but lets add a smoke check to make sure
+ // that doesn't change.
+ const _: () = assert!(
+ align_of::<c_ulong>() == align_of::<sigset_t>()
+ && (size_of::<sigset_t>() % size_of::<c_ulong>()) == 0
+ );
- let raw = slice::from_raw_parts_mut(set as *mut u8, mem::size_of::<libc::sigset_t>());
let bit = (signum - 1) as usize;
- raw[bit / 8] |= 1 << (bit % 8);
+ if set.is_null() || bit < 0 || bit >= (8 * size_of::<sigset_t>()) {
+ crate::sys::unix::os::set_errno(libc::EINVAL);
+ return -1;
+ }
+ let raw = slice::from_raw_parts_mut(
+ set as *mut c_ulong,
+ size_of::<sigset_t>() / size_of::<c_ulong>(),
+ );
+ const LONG_BIT: usize = size_of::<c_ulong>() * 8;
+ raw[bit / LONG_BIT] |= 1 << (bit % LONG_BIT);
return 0;
}
} else {