source/libs/poppler/poppler-0.37.0/goo/GooTimer.cc

   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
  29 GooTimer::GooTimer() {
  30   start();
  31 }
  32
  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
  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
  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)
  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
  89 double GooTimer::getElapsed()
  90 {
  91 #warning "no support for GooTimer"
  92   return 0;
  93 }
  94 #endif
  95