libbase/WallClockTimer.cpp

   1 // WallClockTimer.cpp:  Wall clock timer, for Gnash.
   2 //
   3 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Free Software
   4 //   Foundation, Inc
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 3 of the License, or
   9 // (at your option) any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19 //
  20
  21 #include "WallClockTimer.h"
  22 #include "ClockTime.h" // for "portable" get_ticks (contains implementation for win32)
  23
  24 namespace gnash {
  25
  26 WallClockTimer::WallClockTimer()
  27     :
  28     startTimer(clocktime::getTicks())
  29 {
  30 }
  31
  32 void
  33 WallClockTimer::restart()
  34 {
  35     startTimer = clocktime::getTicks();
  36 }
  37
  38 boost::uint32_t
  39 WallClockTimer::elapsed() const
  40 {
  41     boost::uint64_t currTime = clocktime::getTicks();
  42
  43     // be aware of time glitches
  44     if ( currTime <= startTimer ) return 0;
  45
  46     return currTime - startTimer;
  47
  48 }
  49
  50 } // namespace gnash