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#[cfg(not(windows))]
extern crate libc;
#[cfg(windows)]
extern crate windows;
#[cfg(not(windows))]
use std::mem;
use std::time::Duration;
#[cfg(target_os = "linux")]
pub fn get() -> Result<Duration, String> {
let mut info: libc::sysinfo = unsafe { mem::zeroed() };
let ret = unsafe { libc::sysinfo(&mut info) };
if ret == 0 {
Ok(Duration::from_secs(info.uptime as u64))
} else {
Err("sysinfo failed".to_string())
}
}
#[cfg(any(
target_os = "macos",
target_os = "freebsd",
target_os = "openbsd",
target_os = "netbsd"
))]
pub fn get() -> Result<Duration, String> {
use std::time::SystemTime;
let mut request = [libc::CTL_KERN, libc::KERN_BOOTTIME];
let mut boottime: libc::timeval = unsafe { mem::zeroed() };
let mut size: libc::size_t = mem::size_of_val(&boottime) as libc::size_t;
let ret = unsafe {
libc::sysctl(
&mut request[0],
2,
&mut boottime as *mut libc::timeval as *mut libc::c_void,
&mut size,
std::ptr::null_mut(),
0,
)
};
if ret == 0 {
SystemTime::now()
.duration_since(SystemTime::UNIX_EPOCH)
.map(|d| d - Duration::new(boottime.tv_sec as u64, boottime.tv_usec as u32 * 1000))
.map_err(|e| e.to_string())
} else {
Err("sysctl failed".to_string())
}
}
#[cfg(target_os = "windows")]
pub fn get() -> Result<Duration, String> {
let ret: u64 = unsafe { windows::Win32::System::SystemInformation::GetTickCount64() };
Ok(Duration::from_millis(ret))
}