Initial project import

tools/v/vlib/sync/thread_windows.c.v

@@ -0,0 +1,9 @@
+module sync
+
+// Get current thread ID from Windows API (via C interface)
+fn C.GetCurrentThreadId() u32
+
+// thread_id returns a unique identifier for the caller thread.
+pub fn thread_id() u64 {
+	return u64(C.GetCurrentThreadId())
+}