nc 0.9.7

Access system calls directly
Documentation 
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/// Lock memory.
///
/// # Examples
///
/// ```
/// let ret = unsafe { nc::mlockall(nc::MCL_CURRENT) };
/// // We got out-of-memory error in CI environment.
/// assert!(ret.is_ok() || ret == Err(nc::ENOMEM));
/// ```
pub unsafe fn mlockall(flags: i32) -> Result<(), Errno> {
    let flags = flags as usize;
    syscall1(SYS_MLOCKALL, flags).map(drop)
}