Move C/C++ sources to src subdirectory

src/timerfd_interval.h

@@ -0,0 +1,19 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
+
+#pragma once
+
+#include "ringloop.h"
+
+class timerfd_interval
+{
+    int wait_state;
+    int timerfd;
+    ring_loop_t *ringloop;
+    ring_consumer_t consumer;
+    std::function<void(void)> callback;
+public:
+    timerfd_interval(ring_loop_t *ringloop, int seconds, std::function<void(void)> cb);
+    ~timerfd_interval();
+    void loop();
+};