[libcvd-members] libcvd/cvd_src/posix timer.cc

[Edward Rosten]

CVSROOT:        /cvsroot/libcvd
Module name:    libcvd
Changes by:     Edward Rosten <edrosten>        09/05/14 08:08:53

Added files:
        cvd_src/posix  : timer.cc 

Log message:
        Added missing file

CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/libcvd/cvd_src/posix/timer.cc?cvsroot=libcvd&rev=1.1

Patches:
Index: timer.cc
===================================================================
RCS file: timer.cc
diff -N timer.cc
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ timer.cc    14 May 2009 08:08:53 -0000      1.1
@@ -0,0 +1,83 @@
+/*                       
+       This file is part of the CVD Library.
+
+       Copyright (C) 2005 The Authors
+
+       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
+*/
+///////////////////////////////////////////////////////
+// 
+// A timer class designed for dealing with timestamps
+// CK Nov 2002
+//
+///////////////////////////////////////////////////////
+
+#include "cvd/timer.h"
+#include <inttypes.h>
+#include <time.h>  //clock_gettime
+#include <sys/time.h>  //timeval
+
+namespace CVD {
+
+unsigned long long get_time_of_day_ns()
+{
+       struct timespec ts;
+       clock_gettime(CLOCK_REALTIME, &ts);
+       return (unsigned long long)ts.tv_sec*1000000000+ts.tv_nsec;
+}
+
+cvd_timer::cvd_timer()
+{
+       startTime = get_time_of_day_ns();
+}
+
+double cvd_timer::reset() 
+{
+  unsigned long long temp  = get_time_of_day_ns();
+  double elapsed =  (temp - startTime) / 1e9;
+  startTime = temp;
+  return elapsed;
+}
+
+double cvd_timer::get_time() 
+{
+  return (get_time_of_day_ns()-startTime)/1e9;
+}
+
+// Conv from units of nanosecs (specifically for v4l2 : kernel 2.4
+double cvd_timer::conv_ntime(signed long long time)
+{
+  return (time-startTime)/1e9;
+}
+
+// Conv from units of nanosecs (specifically for v4l2 : kernel 2.6
+// Let the overloading mecnanism sort out the difference in the 
+// headers from 2.4 hee, hee, hee
+double cvd_timer::conv_ntime(const struct timeval& tv)
+{
+       double time = tv.tv_sec + tv.tv_usec*1e-6;
+       return time-startTime / 1e6;
+}
+
+double get_time_of_day() 
+{
+  return get_time_of_day_ns()/1e9;
+}
+
+
+cvd_timer timer;
+
+}