From 619d1513422b35bed79c0bfcf72584fe4ec211db Mon Sep 17 00:00:00 2001
From: ponchio <federico.ponchio@isti.cnr.it>
Date: Thu, 1 Jul 2004 21:38:30 +0000
Subject: [PATCH] First draft created.

---
 apps/nexus/stopwatch.cpp | 88 ++++++++++++++++++++++++++++++++++++++++
 apps/nexus/stopwatch.h   | 51 +++++++++++++++++++++++
 2 files changed, 139 insertions(+)
 create mode 100644 apps/nexus/stopwatch.cpp
 create mode 100644 apps/nexus/stopwatch.h

diff --git a/apps/nexus/stopwatch.cpp b/apps/nexus/stopwatch.cpp
new file mode 100644
index 00000000..b5b0c7bf
--- /dev/null
+++ b/apps/nexus/stopwatch.cpp
@@ -0,0 +1,88 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004                                                \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* This program is free software; you can redistribute it and/or modify      *   
+* it under the terms of the GNU General Public License as published by      *
+* the Free Software Foundation; either version 2 of the License, or         *
+* (at your option) any later version.                                       *
+*                                                                           *
+* This program is distributed in the hope that it will be useful,           *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+/****************************************************************************
+  History
+
+$Log: not supported by cvs2svn $
+
+****************************************************************************/
+#include "stopwatch.h"
+
+StopWatch::StopWatch(): elapsed(0) {}
+
+#ifdef _WIN32
+void StopWatch::Start(void) {
+  static int first = 1;
+  if(first) {
+    QueryPerformanceFrequency(&freq);
+    first = 0;
+  }
+  QueryPerformanceCounter(&tstart);
+}
+
+void StopWatch::Stop() {
+  QueryPerformanceCounter(&tend);         
+  elapsed += Diff();
+}               
+
+double StopWatch::Diff() {  
+  return ((double)tend.QuadPart -
+	  (double)tstart.QuadPart)/
+    ((double)freq.QuadPart);
+}         
+
+#else
+
+void StopWatch::Start() {
+   gettimeofday(&tstart, &tz); 
+}
+
+void StopWatch::Stop() {
+  gettimeofday(&tend, &tz); 
+  elapsed += Diff();
+}
+ 
+double StopWatch::Diff() {
+  double t1 =  (double)tstart.tv_sec + (double)tstart.tv_usec/(1000*1000);
+  double t2 =  (double)tend.tv_sec + (double)tend.tv_usec/(1000*1000);
+  return t2 - t1;   
+}
+#endif
+
+void StopWatch::Reset() {
+  elapsed = 0;
+}
+
+double StopWatch::Elapsed() {
+  return elapsed;
+}
+
+int StopWatch::Usec() {
+#ifdef _WIN32
+  return 0;
+#else  
+  struct timeval ttime;
+  gettimeofday(&ttime, &tz);
+  return ttime.tv_usec;
+#endif
+}
diff --git a/apps/nexus/stopwatch.h b/apps/nexus/stopwatch.h
new file mode 100644
index 00000000..685cc7b6
--- /dev/null
+++ b/apps/nexus/stopwatch.h
@@ -0,0 +1,51 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004                                                \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* This program is free software; you can redistribute it and/or modify      *   
+* it under the terms of the GNU General Public License as published by      *
+* the Free Software Foundation; either version 2 of the License, or         *
+* (at your option) any later version.                                       *
+*                                                                           *
+* This program is distributed in the hope that it will be useful,           *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+/****************************************************************************
+  History
+
+$Log: not supported by cvs2svn $
+
+****************************************************************************/
+#include <sys/time.h>
+#include <unistd.h>     
+
+class StopWatch {
+public:
+  StopWatch();
+  void Start();
+  void Stop();
+  void Reset();
+  double Elapsed();
+  int Usec();
+private:
+  double Diff();
+
+#ifdef _WIN32
+  static LARGE_INTEGER _tstart, _tend;
+  static LARGE_INTEGER freq;
+#else  
+  struct timeval tstart, tend;  
+  struct timezone tz;   
+#endif
+  double elapsed;
+};