Function nc::munlock

pub fn munlock(addr: usize, len: size_t) -> Result<(), Errno>

Unlock memory.

let mut passwd_buf = [0_u8; 64];
let addr = passwd_buf.as_ptr() as usize;
let ret = nc::mlock2(addr, passwd_buf.len(), nc::MCL_CURRENT);
for i in 0..passwd_buf.len() {
  passwd_buf[i] = i as u8;
}
assert!(ret.is_ok());
let ret = nc::munlock(addr, passwd_buf.len());
assert!(ret.is_ok());