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/*****************************************************************************
* Author: Vadim Zeitlin <vadim@wxwidgets.org>
*
*****************************************************************************
* Copyright (c) 2004 Vadim Zeitlin
*
* This library is free software; you can distribute it and/or modify it under
* the terms of the GNU Lesser General Public License (LGPL), as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the LGPL in the file COPYING for more
* details.
*
*/
#ifndef _rlog_time_incl
#define _rlog_time_incl
#include <rlog/common.h>
/*! @file time.h
@brief Defines functions for getting current time and benchmarking.
*/
#ifdef _WIN32
#include <windows.h>
#define HAVE_QUERYPERFORMANCECOUNTER 1
typedef __int64 rlog_time_interval;
#if HAVE_QUERYPERFORMANCECOUNTER
typedef LARGE_INTEGER rlog_time;
#define RLOG_TIME_UNIT "clock cycles"
inline
void rlog_get_time(rlog_time *pt)
{
QueryPerformanceCounter(pt);
}
inline
rlog_time_interval rlog_time_diff(const rlog_time& end, const rlog_time& start)
{
long long llEnd, llStart;
memcpy(&llEnd, &end, sizeof(long long));
memcpy(&llStart, &start, sizeof(long long));
return llEnd - llStart;
}
#else // !HAVE_QUERYPERFORMANCECOUNTER
typedef FILETIME rlog_time;
#define RLOG_TIME_UNIT "usec"
inline
void rlog_get_time(rlog_time *pt)
{
GetSystemTimeAsFileTime(pt);
}
inline
rlog_time_interval rlog_time_diff(const rlog_time& end, const rlog_time& start)
{
ULONGLONG ullEnd, ullStart;
memcpy(&ullEnd, &end, sizeof(ULONGLONG));
memcpy(&ullStart, &start, sizeof(ULONGLONG));
return 10*(ullEnd - ullStart);
}
#endif // HAVE_QUERYPERFORMANCECOUNTER
inline
void sleep(int seconds)
{
::Sleep(seconds * 1000);
}
#else // Unix
#include <sys/time.h>
#include <unistd.h> // for sleep()
#if RLOG_TIME_TSC
#include <stdint.h>
typedef uint64_t rlog_time;
typedef int64_t rlog_time_interval;
#define RLOG_TIME_UNIT "clock cycles"
inline void rlog_get_time(uint64_t *pt)
{
asm volatile("RDTSC" : "=A" (*pt));
}
inline
rlog_time_interval rlog_time_diff( const rlog_time &end, const rlog_time &start )
{
return end - start;
}
#else // !HAVE_TSC
#include <unistd.h>
typedef timeval rlog_time;
typedef long rlog_time_interval;
#define RLOG_TIME_UNIT "usec"
inline
void rlog_get_time(rlog_time *pt)
{
gettimeofday( pt, 0 );
}
inline
rlog_time_interval rlog_time_diff( const rlog_time &end, const rlog_time &start )
{
return (end.tv_sec - start.tv_sec) * 1000 * 1000 +
(end.tv_usec - start.tv_usec);
}
#endif // HAVE_TSC/!HAVE_TSC
#endif // Win32/Unix
#endif // _rlog_time_incl
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