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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "TimeUtil.h"
#include <time.h>
#if defined _WIN32
/*
* This emulates the POSIX gettimeofday(timeval, timezone) function on Windows.
* @see http://linux.die.net/man/2/gettimeofday
* @see http://www.suacommunity.com/dictionary/gettimeofday-entry.php
*/
#include <windows.h>
#include <iostream>
using namespace std;
#if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
#define DELTA_EPOCH_IN_MICROSECS 11644473600000000Ui64
#include <winsock2.h>
#else
#define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
#endif
/// Definition of a gettimeofday function
int gettimeofday(struct timeval* tv, struct timezone* tz) {
// Define a structure to receive the current Windows filetime
FILETIME ft;
if (NULL != tv) {
// Initialize the present time to 0
unsigned __int64 tmpres = 0;
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 (tz != NULL) {
// Initialize the timezone to UTC
static int tzflag = 0;
if (!tzflag) {
_tzset();
tzflag++;
}
// Adjust for the timezone west of Greenwich
tz->tz_minuteswest = _timezone / 60;
tz->tz_dsttime = _daylight;
}
return 0;
}
#else // defined _WIN32
#include <sys/time.h>
#endif // defined _WIN32
unsigned long timeUtil_getCurrentTimeMillis() {
struct timeval timediff;
gettimeofday(&timediff, NULL);
const unsigned long milliSeconds = (timediff.tv_sec * 1000UL) + ((timediff.tv_usec + 500UL) / 1000UL);
return milliSeconds;
}
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