libcore/SystemClock.cpp

   1 // SystemClock.cpp -- system-time based VirtualClock for gnash core lib
   2 //
   3 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
   4 //   Free Software 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 "SystemClock.h"
  22
  23 #include "ClockTime.h" // for getting system time
  24
  25 #include <cstdint> // for std::uint64_t typedef
  26
  27 namespace gnash {
  28
  29 namespace {
  30
  31 std::uint64_t
  32 fetchSystemTime()
  33 {
  34     // ClockTime::getTicks always returns milliseconds
  35     return clocktime::getTicks();
  36 }
  37
  38 }
  39
  40 SystemClock::SystemClock()
  41         :
  42         _startTime(fetchSystemTime())
  43 {
  44 }
  45
  46 unsigned long int
  47 SystemClock::elapsed() const
  48 {
  49     return fetchSystemTime() - _startTime;
  50 }
  51
  52 void
  53 SystemClock::restart()
  54 {
  55     _startTime = fetchSystemTime();
  56 }
  57
  58 } // namespace gnash
  59