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timercmn.cpp
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C/C++ Source or Header
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2002-10-15
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404 lines
/////////////////////////////////////////////////////////////////////////////
// Name: common/timercmn.cpp
// Purpose: Common timer implementation
// Author:
// Original version by Julian Smart
// Vadim Zeitlin got rid of all ifdefs (11.12.99)
// Sylvain Bougnoux added wxStopWatch class
// Guillermo Rodriguez <guille@iies.es> rewrote from scratch (Dic/99)
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id: timercmn.cpp,v 1.62.2.2 2002/10/15 16:02:54 JS Exp $
// Copyright: (c) Julian Smart and Markus Holzem
// (c) 1999 Guillermo Rodriguez <guille@iies.es>
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// wxWin headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "timerbase.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/thread.h"
#endif
#include "wx/timer.h"
#include "wx/longlong.h"
// ----------------------------------------------------------------------------
// System headers
// ----------------------------------------------------------------------------
#if defined(__WIN32__)
#include <windows.h>
#endif
#if defined(__WIN32__) && !defined(HAVE_FTIME) && !defined(__MWERKS__)
#define HAVE_FTIME
#endif
#if defined(__VISAGECPP__) && !defined(HAVE_FTIME)
#define HAVE_FTIME
# if __IBMCPP__ >= 400
# define ftime(x) _ftime(x)
# endif
#endif
#if defined(__MWERKS__) && defined(__WXMSW__)
# undef HAVE_FTIME
# undef HAVE_GETTIMEOFDAY
#endif
#include <time.h>
#ifndef __WXMAC__
#include <sys/types.h> // for time_t
#endif
#if defined(HAVE_GETTIMEOFDAY)
#include <sys/time.h>
#include <unistd.h>
#elif defined(HAVE_FTIME)
#include <sys/timeb.h>
#endif
#ifdef __WXMAC__
#include <Timer.h>
#include <DriverServices.h>
#endif
// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------
#if wxUSE_GUI && wxUSE_TIMER
IMPLEMENT_DYNAMIC_CLASS(wxTimerEvent, wxEvent)
#endif // wxUSE_GUI
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
// 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
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// wxTimerBase
// ----------------------------------------------------------------------------
#if wxUSE_GUI && wxUSE_TIMER
wxTimerBase::~wxTimerBase()
{
// this destructor is required for Darwin
}
void wxTimerBase::Notify()
{
// the base class version generates an event if it has owner - which it
// should because otherwise nobody can process timer events
wxCHECK_RET( m_owner, _T("wxTimer::Notify() should be overridden.") );
wxTimerEvent event(m_idTimer, m_milli);
(void)m_owner->ProcessEvent(event);
}
bool wxTimerBase::Start(int milliseconds, bool oneShot)
{
// under MSW timers only work when they're started from the main thread so
// let the caller know about it
#if wxUSE_THREADS
wxASSERT_MSG( wxThread::IsMain(),
_T("timer can only be started from the main thread") );
#endif // wxUSE_THREADS
if ( IsRunning() )
{
// not stopping the already running timer might work for some
// platforms (no problems under MSW) but leads to mysterious crashes
// on the others (GTK), so to be on the safe side do it here
Stop();
}
if ( milliseconds != -1 )
{
m_milli = milliseconds;
}
m_oneShot = oneShot;
return TRUE;
}
#endif // wxUSE_GUI
// ----------------------------------------------------------------------------
// wxStopWatch
// ----------------------------------------------------------------------------
#if wxUSE_LONGLONG
void wxStopWatch::Start(long t)
{
m_t0 = wxGetLocalTimeMillis() - t;
m_pause = 0;
}
long wxStopWatch::GetElapsedTime() const
{
return (wxGetLocalTimeMillis() - m_t0).GetLo();
}
long wxStopWatch::Time() const
{
return m_pauseCount ? m_pause : GetElapsedTime();
}
#endif // wxUSE_LONGLONG
// ----------------------------------------------------------------------------
// old timer functions superceded by wxStopWatch
// ----------------------------------------------------------------------------
#if wxUSE_LONGLONG
static wxLongLong wxStartTime = 0l;
// starts the global timer
void wxStartTimer()
{
wxStartTime = wxGetLocalTimeMillis();
}
// Returns elapsed time in milliseconds
long wxGetElapsedTime(bool resetTimer)
{
wxLongLong oldTime = wxStartTime;
wxLongLong newTime = wxGetLocalTimeMillis();
if ( resetTimer )
wxStartTime = newTime;
return (newTime - oldTime).GetLo();
}
#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()
{
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);
#elif defined(__WXMAC__)
UInt64 gMilliAtStart = 0 ;
Nanoseconds upTime = AbsoluteToNanoseconds( UpTime() ) ;
if ( gMilliAtStart == 0 )
{
time_t start = time(NULL) ;
gMilliAtStart = ((UInt64) start) * 1000L ;
gMilliAtStart -= upTime.lo / 1000 ;
gMilliAtStart -= ( ( (UInt64) upTime.hi ) << 32 ) / 1000 ;
}
UInt64 millival = gMilliAtStart ;
millival += upTime.lo / 1000 ;
millival += ( ( (UInt64) upTime.hi ) << 32 ) / 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
#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
#endif
return val;
#endif // time functions
}
#endif // wxUSE_LONGLONG