Function try_decode_void_star

src/backend/linux_raw/io/errno.rs:145–155

(
    raw: RetReg<Num>,
)

/// `*mut c_void` on success.
#[inline]
pub(in crate::backend) fn try_decode_void_star<Num: RetNumber>(
    raw: RetReg<Num>,
) -> io::Result<*mut c::c_void> {
    if raw.is_in_range(-4095..0) {
        // SAFETY: `raw` must be in `-4095..0`, and we just checked that raw is
        // in that range.
        return Err(unsafe { Errno(raw.decode_error_code()) });
    }

    Ok(raw.decode_void_star())
}

/// Check for an error from the result of a syscall which encodes a
/// `u64` on success.