libs/wave/tool/stop_watch.hpp

   1 /*=============================================================================
   2     Boost.Wave: A Standard compliant C++ preprocessor library
   3     http://www.boost.org/
   4
   5     Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost
   6     Software License, Version 1.0. (See accompanying file
   7     LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   8 =============================================================================*/
   9
  10 #if !defined(STOP_WATCH_HPP_HK040911_INCLUDED)
  11 #define STOP_WATCH_HPP_HK040911_INCLUDED
  12
  13 #include <boost/config.hpp>
  14 #include <boost/timer.hpp>
  15
  16 ///////////////////////////////////////////////////////////////////////////////
  17 //
  18 class stop_watch : public boost::timer {
  19
  20     typedef boost::timer base_t;
  21
  22 public:
  23     stop_watch() : is_suspended_since(0), suspended_overall(0) {}
  24
  25     void suspend()
  26     {
  27         if (0 == is_suspended_since) {
  28         // if not already suspended
  29             is_suspended_since = this->base_t::elapsed();
  30         }
  31     }
  32     void resume()
  33     {
  34         if (0 != is_suspended_since) {
  35         // if really suspended
  36             suspended_overall += this->base_t::elapsed() - is_suspended_since;
  37             is_suspended_since = 0;
  38         }
  39     }
  40     double elapsed() const
  41     {
  42         if (0 == is_suspended_since) {
  43         // currently running
  44             return this->base_t::elapsed() - suspended_overall;
  45         }
  46
  47     // currently suspended
  48         BOOST_ASSERT(is_suspended_since >= suspended_overall);
  49         return is_suspended_since - suspended_overall;
  50     }
  51
  52     std::string format_elapsed_time() const
  53     {
  54     double current = elapsed();
  55     char time_buffer[sizeof("1234:56:78.90 abcd.")+1];
  56
  57         using namespace std;
  58         if (current >= 3600) {
  59         // show hours
  60             sprintf (time_buffer, "%d:%02d:%02d.%03d hrs.",
  61                 (int)(current) / 3600, ((int)(current) % 3600) / 60,
  62                 ((int)(current) % 3600) % 60,
  63                 (int)(current * 1000) % 1000);
  64         }
  65         else if (current >= 60) {
  66         // show minutes
  67             sprintf (time_buffer, "%d:%02d.%03d min.",
  68                 (int)(current) / 60, (int)(current) % 60,
  69                 (int)(current * 1000) % 1000);
  70         }
  71         else {
  72         // show seconds
  73             sprintf(time_buffer, "%d.%03d sec.", (int)current,
  74                 (int)(current * 1000) % 1000);
  75         }
  76         return time_buffer;
  77     }
  78
  79 private:
  80     double is_suspended_since;
  81     double suspended_overall;
  82 };
  83
  84 #endif // !defined(STOP_WATCH_HPP_HK040911_INCLUDED)