nc 0.9.8

Access system calls directly
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

/// Get resource usage.
///
/// # Examples
///
/// ```
/// let mut usage = nc::rusage_t::default();
/// let ret = unsafe { nc::getrusage(nc::RUSAGE_SELF, &mut usage) };
/// assert!(ret.is_ok());
/// assert!(usage.ru_maxrss > 0);
/// assert_eq!(usage.ru_nswap, 0);
/// ```
pub unsafe fn getrusage(who: i32, usage: &mut rusage_t) -> Result<(), Errno> {
    let who = who as usize;
    let usage_ptr = core::ptr::from_mut(usage) as usize;
    unsafe { syscall2(SYS_GETRUSAGE, who, usage_ptr).map(drop) }
}