1 /*
   2  * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.glass.ui.ios;
  27 
  28 import com.sun.glass.ui.Timer;
  29 
  30 /**
  31  * iOS platform implementation class for Timer.
  32  */
  33 final class IosTimer extends Timer implements Runnable {
  34     private Thread timerThread;
  35     private Runnable timerRunnable;
  36     private long timerPeriod;
  37 
  38     protected IosTimer(Runnable runnable) {
  39         super(runnable);
  40     }
  41 
  42     @Override native protected long _start(Runnable runnable);
  43 
  44     native protected void _stopVsyncTimer(long timer);
  45 
  46     @Override
  47     protected long _start(Runnable runnable, int period) {
  48         timerThread = new Thread(this);
  49         timerRunnable = runnable;
  50         timerPeriod = period;
  51         timerThread.start();
  52         return timerThread.hashCode();
  53     }
  54 
  55     @Override
  56     protected void _stop(long timer) {
  57         if (timerThread != null ) {
  58             Thread t = timerThread;
  59             timerThread = null;
  60             try {
  61                 t.join();
  62             } catch (InterruptedException e) { }
  63         } else {
  64             _stopVsyncTimer(timer);
  65         }
  66     }
  67 
  68     static int getMinPeriod_impl() {
  69         return 0;
  70     }
  71 
  72     static int getMaxPeriod_impl() {
  73         return 1000000;
  74     }
  75 
  76     /**
  77      * inheritDoc
  78      */
  79     @Override
  80     public void run() {
  81         Thread t = Thread.currentThread();
  82         long start;
  83         long sleepTime;
  84         while (t == timerThread) {
  85             start = System.currentTimeMillis();
  86             timerRunnable.run();
  87             sleepTime = timerPeriod - (System.currentTimeMillis() - start);
  88             if (sleepTime > 0) {
  89                 try {
  90                     Thread.sleep(sleepTime);
  91                 } catch (InterruptedException e) { }
  92             }
  93         }
  94     }
  95 }
  96