Function nc::mlock2

pub fn mlock2(addr: usize, len: size_t, flags: i32) -> Result<(), Errno>

Lock memory.

let mut passwd_buf = [0_u8; 64];
let ret = nc::mlock2(passwd_buf.as_ptr() as usize, passwd_buf.len(), nc::MCL_CURRENT);
assert!(ret.is_ok());