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/*
Copyright (C) 2002-2006 Quantum ESPRESSO group
This file is distributed under the terms of the
GNU General Public License. See the file `License'
in the root directory of the present distribution,
or http://www.gnu.org/copyleft/gpl.txt .
*/
#if defined(_WIN32)
#include <windows.h>
#include <stdint.h>
#else
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#endif
#if defined(_WIN32)
int qe_gettimeofday(struct timeval * tp, struct timezone * tzp)
{
// Note: some broken versions only have 8 trailing zero's, the correct epoch has 9 trailing zero's
// This magic number is the number of 100 nanosecond intervals since January 1, 1601 (UTC)
// until 00:00:00 January 1, 1970
static const uint64_t EPOCH = ((uint64_t) 116444736000000000ULL);
SYSTEMTIME system_time;
FILETIME file_time;
uint64_t time;
GetSystemTime( &system_time );
SystemTimeToFileTime( &system_time, &file_time );
time = ((uint64_t)file_time.dwLowDateTime ) ;
time += ((uint64_t)file_time.dwHighDateTime) << 32;
tp->tv_sec = (long) ((time - EPOCH) / 10000000L);
tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
return 0;
}
#endif
double cclock()
/* Return the second elapsed since Epoch (00:00:00 UTC, January 1, 1970)
*/
{
struct timeval tmp;
double sec;
#if defined(_WIN32)
qe_gettimeofday( &tmp, (struct timezone *)0 );
#else
gettimeofday( &tmp, (struct timezone *)0 );
#endif
sec = tmp.tv_sec + ((double)tmp.tv_usec)/1000000.0;
return sec;
}
double scnds ( )
/* Return the cpu time associated to the current process
*/
{
double sec=0.0;
#if defined(_WIN32)
// from MSDN docs.
FILETIME ct,et,kt,ut;
union { FILETIME ft; uint64_t ui; } cpu;
if (GetProcessTimes(GetCurrentProcess(),&ct,&et,&kt,&ut)) {
cpu.ft = ut;
sec = cpu.ui * 0.0000001;
}
#else
static struct rusage T;
getrusage(RUSAGE_SELF, &T);
sec = ((double)T.ru_utime.tv_sec + ((double)T.ru_utime.tv_usec)/1000000.0);
#endif
return sec;
}
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