///////////////////////////////////////////////////////////////////////////////
-// Name: common/stopwatch.cpp
+// Name: src/common/stopwatch.cpp
// Purpose: wxStopWatch and other non-GUI stuff from wx/timer.h
// Author:
// Original version by Julian Smart
// Created: 20.06.2003 (extracted from common/timercmn.cpp)
// RCS-ID: $Id$
// Copyright: (c) 1998-2003 wxWidgets Team
-// License: wxWindows license
+// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
#pragma hdrstop
#endif
+#include "wx/stopwatch.h"
+
+#if wxUSE_STOPWATCH
+
#ifndef WX_PRECOMP
- #include "wx/intl.h"
+ #ifdef __WINDOWS__
+ #include "wx/msw/wrapwin.h"
+ #endif
#include "wx/log.h"
+ #include "wx/thread.h"
#endif //WX_PRECOMP
-#include "wx/longlong.h"
-#include "wx/stopwatch.h"
+// ============================================================================
+// implementation
+// ============================================================================
// ----------------------------------------------------------------------------
-// System headers
+// wxStopWatch
// ----------------------------------------------------------------------------
-#if defined(__WIN32__)
- #include "wx/msw/wrapwin.h"
-#endif
+namespace
+{
-#if defined(__WIN32__) && !defined(HAVE_FTIME) && !defined(__MWERKS__) && !defined(__WXWINCE__)
- #define HAVE_FTIME
-#endif
+#ifdef __WINDOWS__
-#if defined(__VISAGECPP__) && !defined(HAVE_FTIME)
- #define HAVE_FTIME
-# if __IBMCPP__ >= 400
- # define ftime(x) _ftime(x)
-# endif
-#endif
+struct PerfCounter
+{
+ PerfCounter()
+ {
+ init = false;
+ }
-#if defined(__MWERKS__) && defined(__WXMSW__)
-# undef HAVE_FTIME
-# undef HAVE_GETTIMEOFDAY
-#endif
+ bool CanBeUsed() const
+ {
+ return freq.QuadPart != 0;
+ }
-#ifndef __WXWINCE__
-#include <time.h>
-#else
-#include "wx/msw/private.h"
-#include "wx/msw/wince/time.h"
-#endif
+ wxCRIT_SECT_DECLARE_MEMBER(cs);
+ LARGE_INTEGER freq;
+ bool init;
+} gs_perfCounter;
-#if !defined(__WXMAC__) && !defined(__WXWINCE__)
- #include <sys/types.h> // for time_t
-#endif
+#endif // __WINDOWS__
-#if defined(HAVE_GETTIMEOFDAY)
- #include <sys/time.h>
- #include <unistd.h>
-#elif defined(HAVE_FTIME)
- #include <sys/timeb.h>
-#endif
+const int MILLISECONDS_PER_SECOND = 1000;
+const int MICROSECONDS_PER_MILLISECOND = 1000;
+const int MICROSECONDS_PER_SECOND = 1000*1000;
-#ifdef __WXMAC__
- #include <Timer.h>
- #include <DriverServices.h>
-#endif
+} // anonymous namespace
-// ----------------------------------------------------------------------------
-// macros
-// ----------------------------------------------------------------------------
+void wxStopWatch::DoStart()
+{
+#ifdef __WINDOWS__
+ if ( !gs_perfCounter.init )
+ {
+ wxCRIT_SECT_LOCKER(lock, gs_perfCounter.cs);
+ ::QueryPerformanceFrequency(&gs_perfCounter.freq);
-// on some really old systems gettimeofday() doesn't have the second argument,
-// define wxGetTimeOfDay() to hide this difference
-#ifdef HAVE_GETTIMEOFDAY
- #ifdef WX_GETTIMEOFDAY_NO_TZ
- struct timezone;
- #define wxGetTimeOfDay(tv, tz) gettimeofday(tv)
- #else
- #define wxGetTimeOfDay(tv, tz) gettimeofday((tv), (tz))
- #endif
-#endif // HAVE_GETTIMEOFDAY
+ // Just a sanity check: it's not supposed to happen but verify that
+ // ::QueryPerformanceCounter() succeeds so that we can really use it.
+ LARGE_INTEGER counter;
+ if ( !::QueryPerformanceCounter(&counter) )
+ {
+ wxLogDebug("QueryPerformanceCounter() unexpected failed (%s), "
+ "will not use it.", wxSysErrorMsg());
-// ============================================================================
-// implementation
-// ============================================================================
+ gs_perfCounter.freq.QuadPart = 0;
+ }
-// ----------------------------------------------------------------------------
-// wxStopWatch
-// ----------------------------------------------------------------------------
+ gs_perfCounter.init = true;
+ }
+#endif // __WINDOWS__
-#if wxUSE_STOPWATCH
+ m_t0 = GetCurrentClockValue();
+}
+
+wxLongLong wxStopWatch::GetClockFreq() const
+{
+#ifdef __WINDOWS__
+ // Under MSW we use the high resolution performance counter timer which has
+ // its own frequency (usually related to the CPU clock speed).
+ if ( gs_perfCounter.CanBeUsed() )
+ return gs_perfCounter.freq.QuadPart;
+#endif // __WINDOWS__
+
+#ifdef HAVE_GETTIMEOFDAY
+ // With gettimeofday() we can have nominally microsecond precision and
+ // while this is not the case in practice, it's still better than
+ // millisecond.
+ return MICROSECONDS_PER_SECOND;
+#else // !HAVE_GETTIMEOFDAY
+ // Currently milliseconds are used everywhere else.
+ return MILLISECONDS_PER_SECOND;
+#endif // HAVE_GETTIMEOFDAY/!HAVE_GETTIMEOFDAY
+}
-void wxStopWatch::Start(long t)
+void wxStopWatch::Start(long t0)
{
- m_t0 = wxGetLocalTimeMillis() - t;
- m_pause = 0;
+ // Calling Start() makes the stop watch run however many times it was
+ // paused before.
m_pauseCount = 0;
+
+ DoStart();
+
+ m_t0 -= (wxLongLong(t0)*GetClockFreq())/MILLISECONDS_PER_SECOND;
}
-long wxStopWatch::GetElapsedTime() const
+wxLongLong wxStopWatch::GetCurrentClockValue() const
{
- return (wxGetLocalTimeMillis() - m_t0).GetLo();
+#ifdef __WINDOWS__
+ if ( gs_perfCounter.CanBeUsed() )
+ {
+ LARGE_INTEGER counter;
+ ::QueryPerformanceCounter(&counter);
+ return counter.QuadPart;
+ }
+#endif // __WINDOWS__
+
+#ifdef HAVE_GETTIMEOFDAY
+ return wxGetUTCTimeUSec();
+#else // !HAVE_GETTIMEOFDAY
+ return wxGetUTCTimeMillis();
+#endif // HAVE_GETTIMEOFDAY/!HAVE_GETTIMEOFDAY
}
-long wxStopWatch::Time() const
+wxLongLong wxStopWatch::TimeInMicro() const
{
- return m_pauseCount ? m_pause : GetElapsedTime();
+ const wxLongLong elapsed(m_pauseCount ? m_elapsedBeforePause
+ : GetCurrentClockValue() - m_t0);
+
+ return (elapsed*MICROSECONDS_PER_SECOND)/GetClockFreq();
}
#endif // wxUSE_STOPWATCH
// starts the global timer
void wxStartTimer()
{
- wxStartTime = wxGetLocalTimeMillis();
+ wxStartTime = wxGetUTCTimeMillis();
}
// Returns elapsed time in milliseconds
long wxGetElapsedTime(bool resetTimer)
{
wxLongLong oldTime = wxStartTime;
- wxLongLong newTime = wxGetLocalTimeMillis();
+ wxLongLong newTime = wxGetUTCTimeMillis();
if ( resetTimer )
wxStartTime = newTime;
}
#endif // wxUSE_LONGLONG
-
-// ----------------------------------------------------------------------------
-// the functions to get the current time and timezone info
-// ----------------------------------------------------------------------------
-
-// Get local time as seconds since 00:00:00, Jan 1st 1970
-long wxGetLocalTime()
-{
- struct tm tm;
- 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
-
- // Return the difference in seconds.
- //
- if (( t0 != (time_t)-1 ) && ( t1 != (time_t)-1 ))
- return (long)difftime(t1, t0) + (60 * 60 * 24 * 4);
-
- wxLogSysError(_("Failed to get the local system time"));
- return -1;
-}
-
-// Get UTC time as seconds since 00:00:00, Jan 1st 1970
-long wxGetUTCTime()
-{
- return (long)time(NULL);
-}
-
-#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(__WINE__) || 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);
-#elif defined(__WXMAC__)
-
- static UInt64 gMilliAtStart = 0;
-
- Nanoseconds upTime = AbsoluteToNanoseconds( UpTime() );
-
- if ( gMilliAtStart == 0 )
- {
- time_t start = time(NULL);
- gMilliAtStart = ((UInt64) start) * 1000000L;
- gMilliAtStart -= upTime.lo / 1000 ;
- gMilliAtStart -= ( ( (UInt64) upTime.hi ) << 32 ) / (1000 * 1000);
- }
-
- UInt64 millival = gMilliAtStart;
- millival += upTime.lo / (1000 * 1000);
- millival += ( ( (UInt64) upTime.hi ) << 32 ) / (1000 * 1000);
- val = millival;
-
- return val;
-#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
-// JACS: unfortunately not. WinCE doesn't have it.
-#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>
-
- // FIXME
-#ifndef __WXWINCE__
- #warning "Possible clock skew bug in wxGetLocalTimeMillis()!"
-#endif
-
- 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
-#endif
-
- return val;
-
-#endif // time functions
-}
-
-#endif // wxUSE_LONGLONG
-
-
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