1 files changed, 31 insertions, 0 deletions
diff --git a/third_party/rust/whatsys/src/windows.rs b/third_party/rust/whatsys/src/windows.rs
new file mode 100644
index 0000000000..07ae21dd56
--- /dev/null
+++ b/third_party/rust/whatsys/src/windows.rs
@@ -0,0 +1,31 @@
+use libc::c_char;
+use std::{ffi, ptr};
+
+extern "C" {
+    fn get_os_release() -> *const c_char;
+    fn str_free(ptr: *const c_char);
+}
+
+/// Get the version of the currently running kernel.
+///
+/// **Note**: On Windows 8 and later this will report the Windows 8 OS version value `6.2`,
+/// unless the final application is build to explicitly target Windows 10.
+/// See [`GetVersionEx`] for details.
+///
+/// [`GetVersionEx`]: https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getversionexa
+///
+///
+/// Returns `None` if an error occured.
+pub fn kernel_version() -> Option<String> {
+    unsafe {
+        let rp = get_os_release();
+        if rp == ptr::null() {
+            None
+        } else {
+            let typ = ffi::CStr::from_ptr(rp);
+            let res = Some(typ.to_string_lossy().into_owned());
+            str_free(rp);
+            res
+        }
+    }
+}