a359bb4f
 Hu Chunming
调通可正常运行 -- 初版
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/**
* Copyright 1993-2013 NVIDIA Corporation. All rights reserved.
*
* Please refer to the NVIDIA end user license agreement (EULA) associated
* with this source code for terms and conditions that govern your use of
* this software. Any use, reproduction, disclosure, or distribution of
* this software and related documentation outside the terms of the EULA
* is strictly prohibited.
*
*/
/* StopWathch Timer Multi-Platform Library */
// includes, file
#include <stopwatch_win.h>
////////////////////////////////////////////////////////////////////////////////
// Variables, static
//! tick frequency
/*static*/ double StopWatchWin::freq;
//! flag if the frequency has been set
/*static*/
bool StopWatchWin::freq_set;
////////////////////////////////////////////////////////////////////////////////
//! Constructor, default
////////////////////////////////////////////////////////////////////////////////
StopWatchWin::StopWatchWin() :
start_time(),
end_time(),
diff_time(0.0),
total_time(0.0),
running(false),
clock_sessions(0)
{
if (! freq_set)
{
// helper variable
LARGE_INTEGER temp;
// get the tick frequency from the OS
QueryPerformanceFrequency((LARGE_INTEGER *) &temp);
// convert to type in which it is needed
freq = ((double) temp.QuadPart) / 1000.0;
// rememeber query
freq_set = true;
}
}
////////////////////////////////////////////////////////////////////////////////
// Destructor
////////////////////////////////////////////////////////////////////////////////
StopWatchWin::~StopWatchWin() { }
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