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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 
00027                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00028 
00029 
00030         @version        Initial version, July 2004      
00031         @author         Kris
00032 
00033 
00034 *******************************************************************************/
00035 
00036 module mango.utils.Timer;
00037 
00038 private import mango.base.System;
00039 
00040 /*******************************************************************************
00041 
00042 *******************************************************************************/
00043 
00044 class Timer
00045 {
00046         private ulong   time;
00047         private uint    pause,
00048                         interval;
00049         
00050         /***********************************************************************
00051 
00052                 Construct a Timer for the specified interval (in microseconds)
00053 
00054         ***********************************************************************/
00055 
00056         this (uint interval)
00057         {
00058                 this.interval = interval;
00059                 pause = interval / 2000;
00060                 update ();
00061 
00062                 System.createThread (&run, true);
00063         }
00064 
00065         /***********************************************************************
00066 
00067                 Returns the current time in milliseconds
00068 
00069         ***********************************************************************/
00070 
00071         ulong getTime ()
00072         {
00073                 volatile return time;
00074         }
00075 
00076         /***********************************************************************
00077 
00078         ***********************************************************************/
00079 
00080         private final void update ()
00081         {
00082                 volatile time = (System.getMillisecs() / interval) * interval;
00083         }
00084 
00085         /***********************************************************************
00086 
00087         ***********************************************************************/
00088 
00089         private int run()
00090         {
00091                 while (true)
00092                       {
00093                       System.sleep (pause);
00094                       update ();
00095                       }
00096                 return 0;
00097         }
00098 }

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