easy measuring time. Let's go benchmarking !

Not yet tested on window (Linux/Mac:OK)

include/Utils/chrono.h

+/*******************************************************************************
+ * CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
+ * version 0.1                                                                  *
+ * Copyright (C) 2009-2011, IGG Team, LSIIT, University of Strasbourg           *
+ *                                                                              *
+ * This library is free software; you can redistribute it and/or modify it      *
+ * under the terms of the GNU Lesser General Public License as published by the *
+ * Free Software Foundation; either version 2.1 of the License, or (at your     *
+ * option) any later version.                                                   *
+ *                                                                              *
+ * This library 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 Lesser General Public License  *
+ * for more details.                                                            *
+ *                                                                              *
+ * You should have received a copy of the GNU Lesser General Public License     *
+ * along with this library; if not, write to the Free Software Foundation,      *
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
+ *                                                                              *
+ * Web site: http://cgogn.u-strasbg.fr/                                         *
+ * Contact information: cgogn@unistra.fr                                        *
+ *                                                                              *
+ *******************************************************************************/
+#ifndef _CGOGN_CHRONO_H_
+#define _CGOGN_CHRONO_H_
+
+
+#if defined WIN32
+	#include <windows.h>
+#else
+	#include <sys/time.h>
+#endif
+
+
+namespace CGoGN
+{
+namespace Utils
+{
+#if defined _WIN32
+class Chrono
+{
+	ULARGE_INTEGER m_begin;
+	ULARGE_INTEGER m_end;
+public:
+	/// start the chrono
+	inline void start()
+	{
+		FILETIME ttmp={0,0};
+		::GetSystemTimeAsFileTime(&ttmp);
+	    m_begin.HighPart=ttmp.dwHighDateTime;
+	    m_begin.LowPart=ttmp.dwLowDateTime;
+	 }
+
+	/// return elapsed time since start (cumulative if several calls)
+	inline int elapsed()
+	{
+		FILETIME ttmp={0,0};
+		::GetSystemTimeAsFileTime(&ttmp);
+		m_end.HighPart=ttmp.dwHighDateTime;
+		m_end.LowPart=ttmp.dwLowDateTime;
+    	return int((double(m_end.QuadPart-m_begin.QuadPart)/10000.0));
+    }
+};
+#else
+/**
+ * class for each time mesuring
+ */
+class Chrono
+{
+	struct timeval m_start;
+	struct timeval m_end;
+public:
+	/// start the chrono
+	inline void start() { gettimeofday(&m_start, NULL) ; }
+
+	/// return elapsed time since start (cumulative if several calls)
+	inline int elapsed()
+	{
+		gettimeofday(&m_end, NULL) ;
+	    long seconds  = m_end.tv_sec  - m_start.tv_sec;
+	    long useconds = m_end.tv_usec - m_start.tv_usec;
+    	return int ((seconds * 1000 + useconds/1000.0) + 0.5);
+    }
+
+};
+#endif
+
+}
+}
+
+
+
+
+#endif /* _CGOGN_CHRONO_H_ */