Add rust kext to the mono repo

windows_kext/wdk/src/utils.rs

@@ -0,0 +1,22 @@
+use alloc::string::{String, ToString};
+use ntstatus::ntstatus::NtStatus;
+use windows_sys::Win32::Foundation::STATUS_SUCCESS;
+
+use crate::ffi;
+
+pub fn check_ntstatus(status: i32) -> Result<(), String> {
+    if status == STATUS_SUCCESS {
+        return Ok(());
+    }
+
+    let Some(status) = NtStatus::from_u32(status as u32) else {
+        return Err("UNKNOWN_ERROR_CODE".to_string());
+    };
+
+    return Err(status.to_string());
+}
+
+pub fn get_system_timestamp_ms() -> u64 {
+    // 100 nano seconds units -> device by 10 -> micro seconds -> divide by 1000 -> milliseconds
+    unsafe { ffi::pm_QuerySystemTime() / 10_000 }
+}