1 //========================================================================
2 //
3 // GooTimer.cc
4 //
5 // This file is licensed under GPLv2 or later
6 //
7 // Copyright 2005 Jonathan Blandford <jrb@redhat.com>
8 // Copyright 2007 Krzysztof Kowalczyk <kkowalczyk@gmail.com>
9 // Copyright 2010 Hib Eris <hib@hiberis.nl>
10 // Inspired by gtimer.c in glib, which is Copyright 2000 by the GLib Team
11 //
12 //========================================================================
13 
14 #include <config.h>
15 
16 #ifdef USE_GCC_PRAGMAS
17 #pragma implementation
18 #endif
19 
20 #include "GooTimer.h"
21 #include <string.h>
22 
23 #define USEC_PER_SEC 1000000
24 
25 //------------------------------------------------------------------------
26 // GooTimer
27 //------------------------------------------------------------------------
28 
GooTimer()29 GooTimer::GooTimer() {
30   start();
31 }
32 
start()33 void GooTimer::start() {
34 #ifdef HAVE_GETTIMEOFDAY
35   gettimeofday(&start_time, NULL);
36 #elif defined(_WIN32)
37   QueryPerformanceCounter(&start_time);
38 #endif
39   active = true;
40 }
41 
stop()42 void GooTimer::stop() {
43 #ifdef HAVE_GETTIMEOFDAY
44   gettimeofday(&end_time, NULL);
45 #elif defined(_WIN32)
46   QueryPerformanceCounter(&end_time);
47 #endif
48   active = false;
49 }
50 
51 #ifdef HAVE_GETTIMEOFDAY
getElapsed()52 double GooTimer::getElapsed()
53 {
54   double total;
55   struct timeval elapsed;
56 
57   if (active)
58     gettimeofday(&end_time, NULL);
59 
60   if (start_time.tv_usec > end_time.tv_usec) {
61       end_time.tv_usec += USEC_PER_SEC;
62       end_time.tv_sec--;
63   }
64 
65   elapsed.tv_usec = end_time.tv_usec - start_time.tv_usec;
66   elapsed.tv_sec = end_time.tv_sec - start_time.tv_sec;
67 
68   total = elapsed.tv_sec + ((double) elapsed.tv_usec / 1e6);
69   if (total < 0)
70       total = 0;
71 
72   return total;
73 }
74 #elif defined(_WIN32)
getElapsed()75 double GooTimer::getElapsed()
76 {
77   LARGE_INTEGER   freq;
78   double          time_in_secs;
79   QueryPerformanceFrequency(&freq);
80 
81   if (active)
82     QueryPerformanceCounter(&end_time);
83 
84   time_in_secs = (double)(end_time.QuadPart-start_time.QuadPart)/(double)freq.QuadPart;
85   return time_in_secs * 1000.0;
86 
87 }
88 #else
getElapsed()89 double GooTimer::getElapsed()
90 {
91 #warning "no support for GooTimer"
92   return 0;
93 }
94 #endif
95 
96