src/common/stopwatch.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/stopwatch.cpp
   3 // Purpose:     wxStopWatch and other non-GUI stuff from wx/timer.h
   4 // Author:
   5 //    Original version by Julian Smart
   6 //    Vadim Zeitlin got rid of all ifdefs (11.12.99)
   7 //    Sylvain Bougnoux added wxStopWatch class
   8 //    Guillermo Rodriguez <guille@iies.es> rewrote from scratch (Dic/99)
   9 // Modified by:
  10 // Created:     20.06.2003 (extracted from common/timercmn.cpp)
  11 // RCS-ID:      $Id$
  12 // Copyright:   (c) 1998-2003 wxWidgets Team
  13 // License:     wxWindows license
  14 ///////////////////////////////////////////////////////////////////////////////
  15
  16 // ============================================================================
  17 // declarations
  18 // ============================================================================
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // for compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/intl.h"
  33     #include "wx/log.h"
  34 #endif //WX_PRECOMP
  35
  36 #include "wx/longlong.h"
  37 #include "wx/stopwatch.h"
  38
  39 // ----------------------------------------------------------------------------
  40 // System headers
  41 // ----------------------------------------------------------------------------
  42
  43 #if defined(__WIN32__)
  44     #include "wx/msw/wrapwin.h"
  45 #endif
  46
  47 #if defined(__WIN32__) && !defined(HAVE_FTIME) && !defined(__MWERKS__) && !defined(__WXWINCE__)
  48     #define HAVE_FTIME
  49 #endif
  50
  51 #if defined(__VISAGECPP__) && !defined(HAVE_FTIME)
  52     #define HAVE_FTIME
  53 #  if __IBMCPP__ >= 400
  54     #  define ftime(x) _ftime(x)
  55 #  endif
  56 #endif
  57
  58 #if defined(__MWERKS__) && defined(__WXMSW__)
  59 #   undef HAVE_FTIME
  60 #   undef HAVE_GETTIMEOFDAY
  61 #endif
  62
  63 #ifndef __WXWINCE__
  64 #include <time.h>
  65 #else
  66 #include "wx/msw/private.h"
  67 #include "wx/msw/wince/time.h"
  68 #endif
  69
  70 #if !defined(__WXMAC__) && !defined(__WXWINCE__)
  71     #include <sys/types.h>      // for time_t
  72 #endif
  73
  74 #if defined(HAVE_GETTIMEOFDAY)
  75     #include <sys/time.h>
  76     #include <unistd.h>
  77 #elif defined(HAVE_FTIME)
  78     #include <sys/timeb.h>
  79 #endif
  80
  81 #ifdef __WXMAC__
  82 #ifndef __DARWIN__
  83     #include <Timer.h>
  84     #include <DriverServices.h>
  85 #else
  86     #include <Carbon/Carbon.h>
  87 #endif
  88 #endif
  89
  90 #ifdef __WXPALMOS__
  91     #include <DateTime.h>
  92     #include <TimeMgr.h>
  93     #include <SystemMgr.h>
  94 #endif
  95
  96 // ----------------------------------------------------------------------------
  97 // macros
  98 // ----------------------------------------------------------------------------
  99
 100 // on some really old systems gettimeofday() doesn't have the second argument,
 101 // define wxGetTimeOfDay() to hide this difference
 102 #ifdef HAVE_GETTIMEOFDAY
 103     #ifdef WX_GETTIMEOFDAY_NO_TZ
 104         struct timezone;
 105         #define wxGetTimeOfDay(tv, tz)      gettimeofday(tv)
 106     #else
 107         #define wxGetTimeOfDay(tv, tz)      gettimeofday((tv), (tz))
 108     #endif
 109 #endif // HAVE_GETTIMEOFDAY
 110
 111 // ============================================================================
 112 // implementation
 113 // ============================================================================
 114
 115 // ----------------------------------------------------------------------------
 116 // wxStopWatch
 117 // ----------------------------------------------------------------------------
 118
 119 #if wxUSE_STOPWATCH
 120
 121 void wxStopWatch::Start(long t)
 122 {
 123 #if 0
 124 // __WXMSW__
 125     LARGE_INTEGER frequency_li;
 126     ::QueryPerformanceFrequency( &frequency_li );
 127     m_frequency = frequency_li.QuadPart;
 128     if (m_frequency == 0)
 129     {
 130         m_t0 = wxGetLocalTimeMillis() - t;
 131     }
 132     else
 133     {
 134         LARGE_INTEGER counter_li;
 135         ::QueryPerformanceCounter( &counter_li );
 136         wxLongLong counter = counter_li.QuadPart;
 137         m_t0 = (counter * 10000 / m_frequency) - t*10;
 138     }
 139 #else
 140     m_t0 = wxGetLocalTimeMillis() - t;
 141 #endif
 142     m_pause = 0;
 143     m_pauseCount = 0;
 144 }
 145
 146 long wxStopWatch::GetElapsedTime() const
 147 {
 148 #if 0
 149 //__WXMSW__
 150     if (m_frequency == 0)
 151     {
 152         return (wxGetLocalTimeMillis() - m_t0).GetLo();
 153     }
 154     else
 155     {
 156         LARGE_INTEGER counter_li;
 157         ::QueryPerformanceCounter( &counter_li );
 158         wxLongLong counter = counter_li.QuadPart;
 159         wxLongLong res = (counter * 10000 / m_frequency) - m_t0;
 160         return res.GetLo() / 10;
 161     }
 162 #else
 163     return (wxGetLocalTimeMillis() - m_t0).GetLo();
 164 #endif
 165 }
 166
 167 long wxStopWatch::Time() const
 168 {
 169     return m_pauseCount ? m_pause : GetElapsedTime();
 170 }
 171
 172 #endif // wxUSE_STOPWATCH
 173
 174 // ----------------------------------------------------------------------------
 175 // old timer functions superceded by wxStopWatch
 176 // ----------------------------------------------------------------------------
 177
 178 #if wxUSE_LONGLONG
 179
 180 static wxLongLong wxStartTime = 0l;
 181
 182 // starts the global timer
 183 void wxStartTimer()
 184 {
 185     wxStartTime = wxGetLocalTimeMillis();
 186 }
 187
 188 // Returns elapsed time in milliseconds
 189 long wxGetElapsedTime(bool resetTimer)
 190 {
 191     wxLongLong oldTime = wxStartTime;
 192     wxLongLong newTime = wxGetLocalTimeMillis();
 193
 194     if ( resetTimer )
 195         wxStartTime = newTime;
 196
 197     return (newTime - oldTime).GetLo();
 198 }
 199
 200 #endif // wxUSE_LONGLONG
 201
 202 // ----------------------------------------------------------------------------
 203 // the functions to get the current time and timezone info
 204 // ----------------------------------------------------------------------------
 205
 206 // Get local time as seconds since 00:00:00, Jan 1st 1970
 207 long wxGetLocalTime()
 208 {
 209     struct tm tm;
 210     time_t t0, t1;
 211
 212     // This cannot be made static because mktime can overwrite it.
 213     //
 214     memset(&tm, 0, sizeof(tm));
 215     tm.tm_year  = 70;
 216     tm.tm_mon   = 0;
 217     tm.tm_mday  = 5;        // not Jan 1st 1970 due to mktime 'feature'
 218     tm.tm_hour  = 0;
 219     tm.tm_min   = 0;
 220     tm.tm_sec   = 0;
 221     tm.tm_isdst = -1;       // let mktime guess
 222
 223     // Note that mktime assumes that the struct tm contains local time.
 224     //
 225     t1 = time(&t1);         // now
 226     t0 = mktime(&tm);       // origin
 227
 228     // Return the difference in seconds.
 229     //
 230     if (( t0 != (time_t)-1 ) && ( t1 != (time_t)-1 ))
 231         return (long)difftime(t1, t0) + (60 * 60 * 24 * 4);
 232
 233     wxLogSysError(_("Failed to get the local system time"));
 234     return -1;
 235 }
 236
 237 // Get UTC time as seconds since 00:00:00, Jan 1st 1970
 238 long wxGetUTCTime()
 239 {
 240     return (long)time(NULL);
 241 }
 242
 243 #if wxUSE_LONGLONG
 244
 245 // Get local time as milliseconds since 00:00:00, Jan 1st 1970
 246 wxLongLong wxGetLocalTimeMillis()
 247 {
 248     wxLongLong val = 1000l;
 249
 250     // If possible, use a function which avoids conversions from
 251     // broken-up time structures to milliseconds
 252
 253 #if defined(__WXPALMOS__)
 254     DateTimeType thenst;
 255     thenst.second  = 0;
 256     thenst.minute  = 0;
 257     thenst.hour    = 0;
 258     thenst.day     = 1;
 259     thenst.month   = 1;
 260     thenst.year    = 1970;
 261     thenst.weekDay = 5;
 262     uint32_t now = TimGetSeconds();
 263     uint32_t then = TimDateTimeToSeconds (&thenst);
 264     return SysTimeToMilliSecs(SysTimeInSecs(now - then));
 265 #elif defined(__WXMSW__) && (defined(__WINE__) || defined(__MWERKS__))
 266     // This should probably be the way all WXMSW compilers should do it
 267     // Go direct to the OS for time
 268
 269     SYSTEMTIME thenst = { 1970, 1, 4, 1, 0, 0, 0, 0 };  // 00:00:00 Jan 1st 1970
 270     FILETIME thenft;
 271     SystemTimeToFileTime( &thenst, &thenft );
 272     wxLongLong then( thenft.dwHighDateTime, thenft.dwLowDateTime );   // time in 100 nanoseconds
 273
 274     SYSTEMTIME nowst;
 275     GetLocalTime( &nowst );
 276     FILETIME nowft;
 277     SystemTimeToFileTime( &nowst, &nowft );
 278     wxLongLong now( nowft.dwHighDateTime, nowft.dwLowDateTime );   // time in 100 nanoseconds
 279
 280     return ( now - then ) / 10000.0;  // time from 00:00:00 Jan 1st 1970 to now in milliseconds
 281
 282 #elif defined(HAVE_GETTIMEOFDAY)
 283     struct timeval tp;
 284     if ( wxGetTimeOfDay(&tp, (struct timezone *)NULL) != -1 )
 285     {
 286         val *= tp.tv_sec;
 287         return (val + (tp.tv_usec / 1000));
 288     }
 289     else
 290     {
 291         wxLogError(_("wxGetTimeOfDay failed."));
 292         return 0;
 293     }
 294 #elif defined(HAVE_FTIME)
 295     struct timeb tp;
 296
 297     // ftime() is void and not int in some mingw32 headers, so don't
 298     // test the return code (well, it shouldn't fail anyhow...)
 299     (void)::ftime(&tp);
 300     val *= tp.time;
 301     return (val + tp.millitm);
 302 #elif defined(__WXMAC__)
 303
 304     static UInt64 gMilliAtStart = 0;
 305
 306     Nanoseconds upTime = AbsoluteToNanoseconds( UpTime() );
 307
 308     if ( gMilliAtStart == 0 )
 309     {
 310         time_t start = time(NULL);
 311         gMilliAtStart = ((UInt64) start) * 1000000L;
 312         gMilliAtStart -= upTime.lo / 1000 ;
 313         gMilliAtStart -= ( ( (UInt64) upTime.hi ) << 32 ) / (1000 * 1000);
 314     }
 315
 316     UInt64 millival = gMilliAtStart;
 317     millival += upTime.lo / (1000 * 1000);
 318     millival += ( ( (UInt64) upTime.hi ) << 32 ) / (1000 * 1000);
 319     val = millival;
 320
 321     return val;
 322 #else // no gettimeofday() nor ftime()
 323     // We use wxGetLocalTime() to get the seconds since
 324     // 00:00:00 Jan 1st 1970 and then whatever is available
 325     // to get millisecond resolution.
 326     //
 327     // NOTE that this might lead to a problem if the clocks
 328     // use different sources, so this approach should be
 329     // avoided where possible.
 330
 331     val *= wxGetLocalTime();
 332
 333 // GRG: This will go soon as all WIN32 seem to have ftime
 334 // JACS: unfortunately not. WinCE doesn't have it.
 335 #if defined (__WIN32__)
 336     // If your platform/compiler needs to use two different functions
 337     // to get ms resolution, please do NOT just shut off these warnings,
 338     // drop me a line instead at <guille@iies.es>
 339
 340     // FIXME
 341 #ifndef __WXWINCE__
 342     #warning "Possible clock skew bug in wxGetLocalTimeMillis()!"
 343 #endif
 344
 345     SYSTEMTIME st;
 346     ::GetLocalTime(&st);
 347     val += st.wMilliseconds;
 348 #else // !Win32
 349     // If your platform/compiler does not support ms resolution please
 350     // do NOT just shut off these warnings, drop me a line instead at
 351     // <guille@iies.es>
 352
 353     #if defined(__VISUALC__) || defined (__WATCOMC__)
 354         #pragma message("wxStopWatch will be up to second resolution!")
 355     #elif defined(__BORLANDC__)
 356         #pragma message "wxStopWatch will be up to second resolution!"
 357     #else
 358         #warning "wxStopWatch will be up to second resolution!"
 359     #endif // compiler
 360 #endif
 361
 362     return val;
 363
 364 #endif // time functions
 365 }
 366
 367 #endif // wxUSE_LONGLONG
 368
 369