/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*
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* This file is part of xlslib -- A multiplatform, C/C++ library
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* for dynamic generation of Excel(TM) files.
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*
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* Copyright 2004 Yeico S. A. de C. V. All Rights Reserved.
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* Copyright 2008-2011 David Hoerl All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY David Hoerl ''AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David Hoerl OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#ifndef XLSLIB_TIMESPAN_H
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#define XLSLIB_TIMESPAN_H
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/* #include "common/xlsys.h" */
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#include <time.h>
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#include <assert.h>
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class CCpuClockTimespan
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{
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enum
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{ INVALID_VALUE = -1, };
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public:
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CCpuClockTimespan()
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: m_clockStart(static_cast<clock_t>(INVALID_VALUE)),
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m_nUsedClockTicks(static_cast<clock_t>(INVALID_VALUE))
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{}
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~CCpuClockTimespan()
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{}
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void StartClock()
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{
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// the clock is already started !!!
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// stop it first !!!
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assert( m_clockStart == static_cast<clock_t>(INVALID_VALUE));
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m_nUsedClockTicks = static_cast<clock_t>(INVALID_VALUE);
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m_clockStart = clock();
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}
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void StopClock()
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{
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const clock_t clockStop = clock();
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// start the clock first !!!
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assert( m_clockStart != (clock_t)INVALID_VALUE);
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m_nUsedClockTicks = clockStop - m_clockStart;
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// after this, we can start it again !!!
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m_clockStart = static_cast<clock_t>(INVALID_VALUE);
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}
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unsigned long GetUsedMilliseconds() const
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{
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const int MILLISECONDS_PER_SECOND = 1000;
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// the clock was never started,
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// or it's started, but it has not been stopped yet
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assert( m_nUsedClockTicks != (clock_t)INVALID_VALUE);
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double nSeconds = ( ( double)m_nUsedClockTicks) / CLOCKS_PER_SEC;
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const unsigned long nMilliseconds = (unsigned long)(nSeconds * MILLISECONDS_PER_SECOND);
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return nMilliseconds;
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}
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private:
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// when did we Start to measure
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// clock time?
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clock_t m_clockStart;
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// the used clock ticks, from Start to Stop
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clock_t m_nUsedClockTicks;
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};
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#endif
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