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#ifndef __seconds_h__
#define __seconds_h__ 1
#ifdef _WIN32
#include <Winsock2.h>
#include <time.h>
#include <windows.h>
#include <iostream>
#if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
#define DELTA_EPOCH_IN_MICROSECS 11644473600000000Ui64
#else
#define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
#endif
struct timezone
{
int tz_minuteswest; /* minutes W of Greenwich */
int tz_dsttime; /* type of dst correction */
};
// Definition of a gettimeofday function
inline int gettimeofday(struct timeval *tv, struct timezone *tz)
{
// Define a structure to receive the current Windows filetime
FILETIME ft;
// Initialize the present time to 0 and the timezone to UTC
unsigned __int64 tmpres = 0;
static int tzflag = 0;
if (NULL != tv)
{
GetSystemTimeAsFileTime(&ft);
// The GetSystemTimeAsFileTime returns the number of 100 nanosecond
// intervals since Jan 1, 1601 in a structure. Copy the high bits to
// the 64 bit tmpres, shift it left by 32 then or in the low 32 bits.
tmpres |= ft.dwHighDateTime;
tmpres <<= 32;
tmpres |= ft.dwLowDateTime;
// Convert to microseconds by dividing by 10
tmpres /= 10;
// The Unix epoch starts on Jan 1 1970. Need to subtract the difference
// in seconds from Jan 1 1601.
tmpres -= DELTA_EPOCH_IN_MICROSECS;
// Finally change microseconds to seconds and place in the seconds value.
// The modulus picks up the microseconds.
tv->tv_sec = (long)(tmpres / 1000000UL);
tv->tv_usec = (long)(tmpres % 1000000UL);
}
if (NULL != tz)
{
if (!tzflag)
{
_tzset();
tzflag++;
}
// Adjust for the timezone west of Greenwich
tz->tz_minuteswest = _timezone / 60;
tz->tz_dsttime = _daylight;
}
return 0;
}
#else
#include <sys/time.h>
#endif
namespace utils {
inline double totalseconds()
{
timeval tv;
gettimeofday(&tv,NULL);
return tv.tv_sec+tv.tv_usec/1000000.0;
}
inline double seconds()
{
static double lastseconds=totalseconds();
double t=totalseconds();
double seconds=t-lastseconds;
lastseconds=t;
return seconds;
}
}
#endif
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