added Timer

src/util/Timer.cpp

@@ -0,0 +1,74 @@
+//This file is part of Photon (http://photon.sourceforge.net)
+//Copyright (C) 2004-2005 James Turk
+//
+// Author:
+//  James Turk (jpt2433@rit.edu)
+//
+// Version:
+//  $Id: Timer.cpp,v 1.1 2005/03/02 08:44:16 cozman Exp $
+
+#include "util/Timer.hpp"
+
+namespace photon
+{
+namespace util
+{
+
+Timer::Timer(bool appTimeLinked) :
+    appCore_(AppCore::getInstance()),
+    appTimeLinked_(appTimeLinked)
+{
+    reset();	//initializes other members
+}
+
+Timer::~Timer()
+{
+}
+
+void Timer::reset()
+{
+    lastPause_ = pausedTime_ = appCore_.getTime();
+    paused_ = false;
+}
+
+void Timer::pause()
+{
+    if(!paused_)
+    {
+        lastPause_ = appCore_.getTime();
+        paused_ = true;
+    }
+}
+
+void Timer::unpause()
+{
+    if(paused_)
+    {
+        //when unpausing update the total paused time by that pause
+        pausedTime_ += (appCore_.getTime()-lastPause_);
+        paused_ = false;
+    }
+}
+
+double Timer::getTime() const
+{
+    if(paused_) 
+    {
+        //when paused timer adjusted to subtract currently paused time
+        return appCore_.getTime() - 
+                (pausedTime_ + (appCore_.getTime() - lastPause_));
+    }
+    else
+    {
+        //paused time is the total time the program has been paused
+        return appCore_.getTime() - pausedTime_;   
+    }
+}
+
+bool Timer::isPaused() const
+{
+    return paused_;
+}
+
+}
+}