luaur_vm/functions/
clock_timestamp.rs

1pub(crate) fn clock_timestamp() -> f64 {
2    #[cfg(windows)]
3    {
4        use core::mem::MaybeUninit;
5        #[link(name = "kernel32")]
6        extern "system" {
7            fn QueryPerformanceCounter(lpPerformanceCount: *mut i64) -> i32;
8        }
9        let mut result = 0i64;
10        unsafe {
11            QueryPerformanceCounter(&mut result);
12        }
13        result as f64
14    }
15    #[cfg(target_os = "macos")]
16    {
17        extern "C" {
18            fn mach_absolute_time() -> u64;
19        }
20        unsafe { mach_absolute_time() as f64 }
21    }
22    #[cfg(any(target_os = "linux", target_os = "freebsd"))]
23    {
24        use core::mem::MaybeUninit;
25        #[repr(C)]
26        struct timespec {
27            tv_sec: core::ffi::c_long,
28            tv_nsec: core::ffi::c_long,
29        }
30        extern "C" {
31            fn clock_gettime(clk_id: i32, tp: *mut timespec) -> i32;
32        }
33        const CLOCK_MONOTONIC: i32 = 1;
34        let mut now = MaybeUninit::<timespec>::uninit();
35        unsafe {
36            clock_gettime(CLOCK_MONOTONIC, now.as_mut_ptr());
37            let now = now.assume_init();
38            (now.tv_sec as f64) * 1e9 + (now.tv_nsec as f64)
39        }
40    }
41    #[cfg(target_os = "emscripten")]
42    {
43        extern "C" {
44            fn emscripten_get_now() -> f64;
45        }
46        unsafe { emscripten_get_now() }
47    }
48    #[cfg(not(any(
49        windows,
50        target_os = "macos",
51        target_os = "linux",
52        target_os = "freebsd",
53        target_os = "emscripten"
54    )))]
55    {
56        extern "C" {
57            fn clock() -> core::ffi::c_long;
58        }
59        unsafe { clock() as f64 }
60    }
61}
luaur_vm/functions/clock_timestamp.rs

luaur_vm/functions/
clock_timestamp.rs
