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Timer.d

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00001 /*******************************************************************************
00002 
00003         @file Timer.d
00004         
00005         Copyright (c) 2004 Kris Bell
00006         
00007         This software is provided 'as-is', without any express or implied
00008         warranty. In no event will the authors be held liable for damages
00009         of any kind arising from the use of this software.
00010         
00011         Permission is hereby granted to anyone to use this software for any 
00012         purpose, including commercial applications, and to alter it and/or 
00013         redistribute it freely, subject to the following restrictions:
00014         
00015         1. The origin of this software must not be misrepresented; you must 
00016            not claim that you wrote the original software. If you use this 
00017            software in a product, an acknowledgment within documentation of 
00018            said product would be appreciated but is not required.
00019 
00020         2. Altered source versions must be plainly marked as such, and must 
00021            not be misrepresented as being the original software.
00022 
00023         3. This notice may not be removed or altered from any distribution
00024            of the source.
00025 
00026         4. Derivative works are permitted, but they must carry this notice
00027            in full and credit the original source.
00028 
00029 
00030                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00031 
00032 
00033         @version        Initial version, July 2004      
00034         @author         Kris
00035 
00036 
00037 *******************************************************************************/
00038 
00039 module mango.utils.Timer;
00040 
00041 private import mango.sys.System;
00042 
00043 /*******************************************************************************
00044 
00045 *******************************************************************************/
00046 
00047 class Timer
00048 {
00049         private ulong   time;
00050         private uint    pause,
00051                         interval;
00052         
00053         /***********************************************************************
00054 
00055                 Construct a Timer for the specified interval (in microseconds)
00056 
00057         ***********************************************************************/
00058 
00059         this (uint interval)
00060         {
00061                 this.interval = interval;
00062                 pause = interval / 2000;
00063                 update ();
00064 
00065                 System.createThread (&run, true);
00066         }
00067 
00068         /***********************************************************************
00069 
00070                 Returns the current time in milliseconds
00071 
00072         ***********************************************************************/
00073 
00074         ulong getTime ()
00075         {
00076                 volatile return time;
00077         }
00078 
00079         /***********************************************************************
00080 
00081         ***********************************************************************/
00082 
00083         private final void update ()
00084         {
00085                 volatile time = (System.getMillisecs() / interval) * interval;
00086         }
00087 
00088         /***********************************************************************
00089 
00090         ***********************************************************************/
00091 
00092         version (Ares) 
00093                  alias void ThreadReturn;
00094               else
00095                  alias int ThreadReturn;
00096 
00097         ThreadReturn run ()
00098         {
00099                 while (true)
00100                       {
00101                       System.sleep (pause);
00102                       update ();
00103                       }
00104                 return 0;
00105         }
00106 }

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