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 wxWindows 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/timer.h"
  37 #include "wx/longlong.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     #include <Timer.h>
  83     #include <DriverServices.h>
  84 #endif
  85
  86 // ----------------------------------------------------------------------------
  87 // macros
  88 // ----------------------------------------------------------------------------
  89
  90 // on some really old systems gettimeofday() doesn't have the second argument,
  91 // define wxGetTimeOfDay() to hide this difference
  92 #ifdef HAVE_GETTIMEOFDAY
  93     #ifdef WX_GETTIMEOFDAY_NO_TZ
  94         struct timezone;
  95         #define wxGetTimeOfDay(tv, tz)      gettimeofday(tv)
  96     #else
  97         #define wxGetTimeOfDay(tv, tz)      gettimeofday((tv), (tz))
  98     #endif
  99 #endif // HAVE_GETTIMEOFDAY
 100
 101 // ============================================================================
 102 // implementation
 103 // ============================================================================
 104
 105 // ----------------------------------------------------------------------------
 106 // wxStopWatch
 107 // ----------------------------------------------------------------------------
 108
 109 #if wxUSE_STOPWATCH
 110
 111 void wxStopWatch::Start(long t)
 112 {
 113     m_t0 = wxGetLocalTimeMillis() - t;
 114     m_pause = 0;
 115     m_pauseCount = 0;
 116 }
 117
 118 long wxStopWatch::GetElapsedTime() const
 119 {
 120     return (wxGetLocalTimeMillis() - m_t0).GetLo();
 121 }
 122
 123 long wxStopWatch::Time() const
 124 {
 125     return m_pauseCount ? m_pause : GetElapsedTime();
 126 }
 127
 128 #endif // wxUSE_STOPWATCH
 129
 130 // ----------------------------------------------------------------------------
 131 // old timer functions superceded by wxStopWatch
 132 // ----------------------------------------------------------------------------
 133
 134 #if wxUSE_LONGLONG
 135
 136 static wxLongLong wxStartTime = 0l;
 137
 138 // starts the global timer
 139 void wxStartTimer()
 140 {
 141     wxStartTime = wxGetLocalTimeMillis();
 142 }
 143
 144 // Returns elapsed time in milliseconds
 145 long wxGetElapsedTime(bool resetTimer)
 146 {
 147     wxLongLong oldTime = wxStartTime;
 148     wxLongLong newTime = wxGetLocalTimeMillis();
 149
 150     if ( resetTimer )
 151         wxStartTime = newTime;
 152
 153     return (newTime - oldTime).GetLo();
 154 }
 155
 156 #endif // wxUSE_LONGLONG
 157
 158 // ----------------------------------------------------------------------------
 159 // the functions to get the current time and timezone info
 160 // ----------------------------------------------------------------------------
 161
 162 // Get local time as seconds since 00:00:00, Jan 1st 1970
 163 long wxGetLocalTime()
 164 {
 165     struct tm tm;
 166     time_t t0, t1;
 167
 168     // This cannot be made static because mktime can overwrite it.
 169     //
 170     memset(&tm, 0, sizeof(tm));
 171     tm.tm_year  = 70;
 172     tm.tm_mon   = 0;
 173     tm.tm_mday  = 5;        // not Jan 1st 1970 due to mktime 'feature'
 174     tm.tm_hour  = 0;
 175     tm.tm_min   = 0;
 176     tm.tm_sec   = 0;
 177     tm.tm_isdst = -1;       // let mktime guess
 178
 179     // Note that mktime assumes that the struct tm contains local time.
 180     //
 181     t1 = time(&t1);         // now
 182     t0 = mktime(&tm);       // origin
 183
 184     // Return the difference in seconds.
 185     //
 186     if (( t0 != (time_t)-1 ) && ( t1 != (time_t)-1 ))
 187         return (long)difftime(t1, t0) + (60 * 60 * 24 * 4);
 188
 189     wxLogSysError(_("Failed to get the local system time"));
 190     return -1;
 191 }
 192
 193 // Get UTC time as seconds since 00:00:00, Jan 1st 1970
 194 long wxGetUTCTime()
 195 {
 196     struct tm tm;
 197     struct tm *ptm;
 198     time_t t0, t1;
 199
 200     // This cannot be made static because mktime can overwrite it
 201     //
 202     memset(&tm, 0, sizeof(tm));
 203     tm.tm_year  = 70;
 204     tm.tm_mon   = 0;
 205     tm.tm_mday  = 5;        // not Jan 1st 1970 due to mktime 'feature'
 206     tm.tm_hour  = 0;
 207     tm.tm_min   = 0;
 208     tm.tm_sec   = 0;
 209     tm.tm_isdst = -1;       // let mktime guess
 210
 211     // Note that mktime assumes that the struct tm contains local time.
 212     //
 213     t1 = time(&t1);         // now
 214     t0 = mktime(&tm);       // origin in localtime
 215
 216     if (( t0 != (time_t)-1 ) && ( t1 != (time_t)-1 ))
 217     {
 218         // To get t0 as GMT we convert to a struct tm with gmtime,
 219         // and then back again.
 220         //
 221         ptm = gmtime(&t0);
 222
 223         if (ptm)
 224         {
 225             memcpy(&tm, ptm, sizeof(tm));
 226             t0 = mktime(&tm);
 227
 228             if (t0 != (time_t)-1 )
 229                 return (long)difftime(t1, t0) + (60 * 60 * 24 * 4);
 230             wxLogSysError(_("mktime() failed"));
 231         }
 232         else
 233         {
 234             wxLogSysError(_("gmtime() failed"));
 235         }
 236     }
 237
 238     wxLogError(_("Failed to get the UTC system time."));
 239
 240     return -1;
 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(__WXMSW__) && defined(__MWERKS__)
 254     // This should probably be the way all WXMSW compilers should do it
 255     // Go direct to the OS for time
 256
 257     SYSTEMTIME thenst = { 1970, 1, 4, 1, 0, 0, 0, 0 };  // 00:00:00 Jan 1st 1970
 258     FILETIME thenft;
 259     SystemTimeToFileTime( &thenst, &thenft );
 260     wxLongLong then( thenft.dwHighDateTime, thenft.dwLowDateTime );   // time in 100 nanoseconds
 261
 262     SYSTEMTIME nowst;
 263     GetLocalTime( &nowst );
 264     FILETIME nowft;
 265     SystemTimeToFileTime( &nowst, &nowft );
 266     wxLongLong now( nowft.dwHighDateTime, nowft.dwLowDateTime );   // time in 100 nanoseconds
 267
 268     return ( now - then ) / 10000.0;  // time from 00:00:00 Jan 1st 1970 to now in milliseconds
 269
 270 #elif defined(HAVE_GETTIMEOFDAY)
 271     struct timeval tp;
 272     if ( wxGetTimeOfDay(&tp, (struct timezone *)NULL) != -1 )
 273     {
 274         val *= tp.tv_sec;
 275         return (val + (tp.tv_usec / 1000));
 276     }
 277     else
 278     {
 279         wxLogError(_("wxGetTimeOfDay failed."));
 280         return 0;
 281     }
 282 #elif defined(HAVE_FTIME)
 283     struct timeb tp;
 284
 285     // ftime() is void and not int in some mingw32 headers, so don't
 286     // test the return code (well, it shouldn't fail anyhow...)
 287     (void)ftime(&tp);
 288     val *= tp.time;
 289     return (val + tp.millitm);
 290 #elif defined(__WXMAC__)
 291
 292     static UInt64 gMilliAtStart = 0;
 293
 294     Nanoseconds upTime = AbsoluteToNanoseconds( UpTime() );
 295
 296     if ( gMilliAtStart == 0 )
 297     {
 298         time_t start = time(NULL);
 299         gMilliAtStart = ((UInt64) start) * 1000000L;
 300         gMilliAtStart -= upTime.lo / 1000 ;
 301         gMilliAtStart -= ( ( (UInt64) upTime.hi ) << 32 ) / (1000 * 1000);
 302     }
 303
 304     UInt64 millival = gMilliAtStart;
 305     millival += upTime.lo / (1000 * 1000);
 306     millival += ( ( (UInt64) upTime.hi ) << 32 ) / (1000 * 1000);
 307     val = millival;
 308
 309     return val;
 310 #else // no gettimeofday() nor ftime()
 311     // We use wxGetLocalTime() to get the seconds since
 312     // 00:00:00 Jan 1st 1970 and then whatever is available
 313     // to get millisecond resolution.
 314     //
 315     // NOTE that this might lead to a problem if the clocks
 316     // use different sources, so this approach should be
 317     // avoided where possible.
 318
 319     val *= wxGetLocalTime();
 320
 321 // GRG: This will go soon as all WIN32 seem to have ftime
 322 // JACS: unfortunately not. WinCE doesn't have it.
 323 #if defined (__WIN32__)
 324     // If your platform/compiler needs to use two different functions
 325     // to get ms resolution, please do NOT just shut off these warnings,
 326     // drop me a line instead at <guille@iies.es>
 327
 328     // FIXME
 329 #ifndef __WXWINCE__
 330     #warning "Possible clock skew bug in wxGetLocalTimeMillis()!"
 331 #endif
 332
 333     SYSTEMTIME st;
 334     ::GetLocalTime(&st);
 335     val += st.wMilliseconds;
 336 #else // !Win32
 337     // If your platform/compiler does not support ms resolution please
 338     // do NOT just shut off these warnings, drop me a line instead at
 339     // <guille@iies.es>
 340
 341     #if defined(__VISUALC__) || defined (__WATCOMC__)
 342         #pragma message("wxStopWatch will be up to second resolution!")
 343     #elif defined(__BORLANDC__)
 344         #pragma message "wxStopWatch will be up to second resolution!"
 345     #else
 346         #warning "wxStopWatch will be up to second resolution!"
 347     #endif // compiler
 348 #endif
 349
 350     return val;
 351
 352 #endif // time functions
 353 }
 354
 355 #endif // wxUSE_LONGLONG
 356
 357