core/code/system/f_timer.cpp

   1 /*
   2     fegdk: FE Game Development Kit
   3     Copyright (C) 2001-2008 Alexey "waker" Yakovenko
   4
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Library General Public
   7     License as published by the Free Software Foundation; either
   8     version 2 of the License, or (at your option) any later version.
   9
  10     This library is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13     Library General Public License for more details.
  14
  15     You should have received a copy of the GNU Library General Public
  16     License along with this library; if not, write to the Free
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18
  19     Alexey Yakovenko
  20     waker@users.sourceforge.net
  21 */
  22
  23 #include "pch.h"
  24 #include "f_timer.h"
  25 #ifndef _WIN32
  26 #include <sys/time.h>
  27 #endif
  28
  29 namespace fe
  30 {
  31
  32         static float processTime;
  33
  34         void
  35         initProcessTime (void)
  36         {
  37         #ifdef _WIN32
  38                 processTime = timeGetTime ()*0.001f;
  39         #else
  40                 struct timeval tv;
  41                 gettimeofday (&tv, NULL);
  42                 processTime = tv.tv_sec + tv.tv_usec * 0.000001;
  43         #endif
  44         }
  45
  46         #ifdef _WIN32
  47         float
  48         getProcessTime (void)
  49         {
  50                 return timeGetTime ()*0.001f - processTime;
  51         }
  52         #else
  53         float getProcessTime (void)
  54         {
  55                 struct timeval tv;
  56                 gettimeofday (&tv, NULL);
  57                 return tv.tv_sec + tv.tv_usec * 0.000001- processTime;
  58         }
  59         #endif
  60
  61         void sleep (int ms)
  62         {
  63         }
  64
  65         timer::timer (void)
  66         {
  67                 mbPaused = false;
  68                 mPrevTime = 0;
  69                 mCurrentTime = 0;
  70                 mSysPrevTime = 0;
  71                 mSysCurrentTime = 0;
  72                 mStartTime = getProcessTime ();
  73         }
  74
  75         timer::~timer ()
  76         {
  77         }
  78
  79         void            timer::update (void)
  80         {
  81                 // update timer
  82                 mSysPrevTime = mSysCurrentTime;
  83                 mSysCurrentTime = getProcessTime () - mStartTime;
  84
  85                 mPrevTime = mCurrentTime;
  86                 if (!mbPaused)
  87                         mCurrentTime += mSysCurrentTime - mSysPrevTime;
  88         }
  89
  90         float           timer::getTime (void) const
  91         {
  92                 return mCurrentTime;
  93         }
  94
  95         float           timer::getTimePassed (void) const
  96         {
  97                 return mCurrentTime - mPrevTime;
  98         }
  99
 100         float           timer::getSysTime (void) const
 101         {
 102                 return mSysCurrentTime;
 103         }
 104
 105         float           timer::getSysTimePassed () const
 106         {
 107                 return mSysCurrentTime - mSysPrevTime;
 108         }
 109
 110         void            timer::pause (bool onoff)
 111         {
 112                 mbPaused = onoff;
 113                 update ();
 114         }
 115
 116         bool            timer::isPaused (void) const
 117         {
 118                 return mbPaused;
 119         }
 120
 121 }
 122