Implemented the tick handler

lib/Gpio.php

@@ -57,11 +57,13 @@ class Gpio implements \ArrayAccess
         $read = $this->fd_gpio;
         $write = array();
         $except = $read;
-        select($read, $write, $except, 0);
-        foreach($except as $fd) {
-            $pin = $this->getPinFromFd($fd);
-            $pin->doInterrupt();
-        
+        if (count($read)>0) {
+            stream_select($read, $write, $except, 0);
+            foreach($except as $fd) {
+                $pin = $this->getPinFromFd($fd);
+                $pin->doInterrupt();
+            
+            }
         }
     }
     

lib/GpioTickHandler.php

@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * Copyright (C) 2014, NoccyLabs
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+namespace NoccyLabs\Gpio;
+
+declare(ticks=5);
+
+class GpioTickHandler
+{
+    protected $gpio = array();
+
+    public function __construct()
+    {
+        register_tick_function(array($this,"onTick"));
+    }
+
+    public function registerGpio(Gpio $gpio)
+    {
+        $this->gpio[] = $gpio;
+        return $this;
+    }
+
+    public function onTick()
+    {
+        foreach($this->gpio as $g) {
+            $g->refresh();
+        }
+    }
+
+}