feat(event loop): global frame counter

src/core/eventloop.rs

@@ -6,9 +6,12 @@ use mio::unix::pipe;
 use mio::{Events, Interest, Poll, Token};
 use slab::Slab;
 use std::io::Write;
+use std::sync::atomic::AtomicU64;
 use std::sync::Arc;
 use std::thread::{self, JoinHandle};
 
+pub static FRAME: AtomicU64 = AtomicU64::new(0);
+
 pub struct EventLoop {
 	pub socket_path: String,
 	join_handle: Option<JoinHandle<Result<()>>>,