+ struct tm tm;
+ struct tm *ptm;
+ time_t t0, t1;
+
+ // This cannot be made static because mktime can overwrite it
+ //
+ memset(&tm, 0, sizeof(tm));
+ tm.tm_year = 70;
+ tm.tm_mon = 0;
+ tm.tm_mday = 5; // not Jan 1st 1970 due to mktime 'feature'
+ tm.tm_hour = 0;
+ tm.tm_min = 0;
+ tm.tm_sec = 0;
+ tm.tm_isdst = -1; // let mktime guess
+
+ // Note that mktime assumes that the struct tm contains local time.
+ //
+ t1 = time(&t1); // now
+ t0 = mktime(&tm); // origin in localtime
+
+ if (( t0 != (time_t)-1 ) && ( t1 != (time_t)-1 ))
+ {
+ // To get t0 as GMT we convert to a struct tm with gmtime,
+ // and then back again.
+ //
+ ptm = gmtime(&t0);
+
+ if (ptm)
+ {
+ memcpy(&tm, ptm, sizeof(tm));
+ t0 = mktime(&tm);
+
+ if (t0 != (time_t)-1 )
+ return (long)difftime(t1, t0) + (60 * 60 * 24 * 4);
+ wxLogSysError(_("mktime() failed"));
+ }
+ else
+ {
+ wxLogSysError(_("gmtime() failed"));
+ }
+ }
+
+ wxLogError(_("Failed to get the UTC system time."));
+
+ return -1;
+}
+
+#if wxUSE_LONGLONG
+
+// Get local time as milliseconds since 00:00:00, Jan 1st 1970
+wxLongLong wxGetLocalTimeMillis()
+{
+ wxLongLong val = 1000l;
+
+ // If possible, use a function which avoids conversions from
+ // broken-up time structures to milliseconds
+
+#if defined(__WXMSW__) && defined(__MWERKS__)
+ // This should probably be the way all WXMSW compilers should do it
+ // Go direct to the OS for time
+
+ SYSTEMTIME thenst = { 1970, 1, 4, 1, 0, 0, 0, 0 }; // 00:00:00 Jan 1st 1970
+ FILETIME thenft;
+ SystemTimeToFileTime( &thenst, &thenft );
+ wxLongLong then( thenft.dwHighDateTime, thenft.dwLowDateTime ); // time in 100 nanoseconds
+
+ SYSTEMTIME nowst;
+ GetLocalTime( &nowst );
+ FILETIME nowft;
+ SystemTimeToFileTime( &nowst, &nowft );
+ wxLongLong now( nowft.dwHighDateTime, nowft.dwLowDateTime ); // time in 100 nanoseconds
+
+ return ( now - then ) / 10000.0; // time from 00:00:00 Jan 1st 1970 to now in milliseconds
+
+#elif defined(HAVE_GETTIMEOFDAY)
+ struct timeval tp;
+ if ( wxGetTimeOfDay(&tp, (struct timezone *)NULL) != -1 )
+ {
+ val *= tp.tv_sec;
+ return (val + (tp.tv_usec / 1000));
+ }
+ else
+ {
+ wxLogError(_("wxGetTimeOfDay failed."));
+ return 0;
+ }
+#elif defined(HAVE_FTIME)
+ struct timeb tp;
+
+ // ftime() is void and not int in some mingw32 headers, so don't
+ // test the return code (well, it shouldn't fail anyhow...)
+ (void)ftime(&tp);
+ val *= tp.time;
+ return (val + tp.millitm);
+#else // no gettimeofday() nor ftime()
+ // We use wxGetLocalTime() to get the seconds since
+ // 00:00:00 Jan 1st 1970 and then whatever is available
+ // to get millisecond resolution.
+ //
+ // NOTE that this might lead to a problem if the clocks
+ // use different sources, so this approach should be
+ // avoided where possible.
+
+ val *= wxGetLocalTime();
+
+// GRG: This will go soon as all WIN32 seem to have ftime
+#if defined (__WIN32__)
+ // If your platform/compiler needs to use two different functions
+ // to get ms resolution, please do NOT just shut off these warnings,
+ // drop me a line instead at <guille@iies.es>
+ #warning "Possible clock skew bug in wxGetLocalTimeMillis()!"
+
+ SYSTEMTIME st;
+ ::GetLocalTime(&st);
+ val += st.wMilliseconds;
+#else // !Win32
+ // If your platform/compiler does not support ms resolution please
+ // do NOT just shut off these warnings, drop me a line instead at
+ // <guille@iies.es>
+
+ #if defined(__VISUALC__) || defined (__WATCOMC__)
+ #pragma message("wxStopWatch will be up to second resolution!")
+ #elif defined(__BORLANDC__)
+ #pragma message "wxStopWatch will be up to second resolution!"
+ #else
+ #warning "wxStopWatch will be up to second resolution!"
+ #endif // compiler
projects / wxWidgets.git / blobdiff