include/wx/stopwatch.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/stopwatch.h
   3 // Purpose:     wxStopWatch and global time-related functions
   4 // Author:      Julian Smart (wxTimer), Sylvain Bougnoux (wxStopWatch)
   5 // Created:     26.06.03 (extracted from wx/timer.h)
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 1998-2003 wxWindows team
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_STOPWATCH_H_
  12 #define _WX_STOPWATCH_H_
  13 //
  14 // ----------------------------------------------------------------------------
  15 // wxStopWatch: measure time intervals with up to 1ms resolution
  16 // ----------------------------------------------------------------------------
  17
  18 #if wxUSE_STOPWATCH
  19
  20 class WXDLLEXPORT wxStopWatch
  21 {
  22 public:
  23     // ctor starts the stop watch
  24     wxStopWatch() { m_pauseCount = 0; Start(); }
  25
  26     // start the stop watch at the moment t0
  27     void Start(long t0 = 0);
  28
  29     // pause the stop watch
  30     void Pause()
  31     {
  32         if ( !m_pauseCount++ )
  33             m_pause = GetElapsedTime();
  34     }
  35
  36     // resume it
  37     void Resume()
  38     {
  39         wxASSERT_MSG( m_pauseCount > 0,
  40                       _T("Resuming stop watch which is not paused") );
  41
  42         if ( !--m_pauseCount )
  43             Start(m_pause);
  44     }
  45
  46     // get elapsed time since the last Start() in milliseconds
  47     long Time() const;
  48
  49 protected:
  50     // returns the elapsed time since t0
  51     long GetElapsedTime() const;
  52
  53 private:
  54     // the time of the last Start()
  55     wxLongLong m_t0;
  56
  57     // the time of the last Pause() (only valid if m_pauseCount > 0)
  58     long m_pause;
  59
  60     // if > 0, the stop watch is paused, otherwise it is running
  61     int m_pauseCount;
  62 };
  63
  64 #endif // wxUSE_STOPWATCH
  65
  66 #if wxUSE_LONGLONG
  67
  68 // Starts a global timer
  69 // -- DEPRECATED: use wxStopWatch instead
  70 void WXDLLEXPORT wxStartTimer();
  71
  72 // Gets elapsed milliseconds since last wxStartTimer or wxGetElapsedTime
  73 // -- DEPRECATED: use wxStopWatch instead
  74 long WXDLLEXPORT wxGetElapsedTime(bool resetTimer = TRUE);
  75
  76 #endif // wxUSE_LONGLONG
  77
  78 // ----------------------------------------------------------------------------
  79 // global time functions
  80 // ----------------------------------------------------------------------------
  81
  82 // Get number of seconds since local time 00:00:00 Jan 1st 1970.
  83 extern long WXDLLEXPORT wxGetLocalTime();
  84
  85 // Get number of seconds since GMT 00:00:00, Jan 1st 1970.
  86 extern long WXDLLEXPORT wxGetUTCTime();
  87
  88 #if wxUSE_LONGLONG
  89 // Get number of milliseconds since local time 00:00:00 Jan 1st 1970
  90 extern wxLongLong WXDLLEXPORT wxGetLocalTimeMillis();
  91 #endif // wxUSE_LONGLONG
  92
  93 #define wxGetCurrentTime() wxGetLocalTime()
  94
  95 #endif // _WX_STOPWATCH_H_
  96