105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/stopwatch.h
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// Purpose: wxStopWatch and global time-related functions
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// Author: Julian Smart (wxTimer), Sylvain Bougnoux (wxStopWatch),
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// Vadim Zeitlin (time functions, current wxStopWatch)
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// Created: 26.06.03 (extracted from wx/timer.h)
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// Copyright: (c) 1998-2003 Julian Smart, Sylvain Bougnoux
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// (c) 2011 Vadim Zeitlin
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_STOPWATCH_H_
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#define _WX_STOPWATCH_H_
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#include "wx/defs.h"
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#include "wx/longlong.h"
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// Time-related functions are also available via this header for compatibility
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// but you should include wx/time.h directly if you need only them and not
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// wxStopWatch itself.
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#include "wx/time.h"
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// ----------------------------------------------------------------------------
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// wxStopWatch: measure time intervals with up to 1ms resolution
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// ----------------------------------------------------------------------------
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#if wxUSE_STOPWATCH
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class WXDLLIMPEXP_BASE wxStopWatch
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{
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public:
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// ctor starts the stop watch
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wxStopWatch() { m_pauseCount = 0; Start(); }
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// Start the stop watch at the moment t0 expressed in milliseconds (i.e.
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// calling Time() immediately afterwards returns t0). This can be used to
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// restart an existing stopwatch.
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void Start(long t0 = 0);
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// pause the stop watch
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void Pause()
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{
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if ( m_pauseCount++ == 0 )
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m_elapsedBeforePause = GetCurrentClockValue() - m_t0;
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}
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// resume it
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void Resume()
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{
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wxASSERT_MSG( m_pauseCount > 0,
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wxT("Resuming stop watch which is not paused") );
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if ( --m_pauseCount == 0 )
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{
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DoStart();
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m_t0 -= m_elapsedBeforePause;
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}
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}
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// Get elapsed time since the last Start() in microseconds.
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wxLongLong TimeInMicro() const;
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// get elapsed time since the last Start() in milliseconds
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long Time() const { return (TimeInMicro()/1000).ToLong(); }
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private:
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// Really starts the stop watch. The initial time is set to current clock
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// value.
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void DoStart();
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// Returns the current clock value in its native units.
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wxLongLong GetCurrentClockValue() const;
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// Return the frequency of the clock used in its ticks per second.
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wxLongLong GetClockFreq() const;
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// The clock value when the stop watch was last started. Its units vary
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// depending on the platform.
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wxLongLong m_t0;
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// The elapsed time as of last Pause() call (only valid if m_pauseCount >
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// 0) in the same units as m_t0.
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wxLongLong m_elapsedBeforePause;
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// if > 0, the stop watch is paused, otherwise it is running
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int m_pauseCount;
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};
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#endif // wxUSE_STOPWATCH
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#if wxUSE_LONGLONG && WXWIN_COMPATIBILITY_2_6
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// Starts a global timer
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// -- DEPRECATED: use wxStopWatch instead
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wxDEPRECATED( void WXDLLIMPEXP_BASE wxStartTimer() );
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// Gets elapsed milliseconds since last wxStartTimer or wxGetElapsedTime
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// -- DEPRECATED: use wxStopWatch instead
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wxDEPRECATED( long WXDLLIMPEXP_BASE wxGetElapsedTime(bool resetTimer = true) );
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#endif // wxUSE_LONGLONG && WXWIN_COMPATIBILITY_2_6
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#endif // _WX_STOPWATCH_H_
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