update

benchmarks/opencl/nearn/gettimeofday.cpp

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+#include "stdio.h"
+#include <time.h>
+#include <windows.h>
+#include <iostream> 
+//using namespace System;
+using namespace std;
+ 
+#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
+ 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
+	long seconds_diff;
+	_get_timezone(&seconds_diff);
+      tz->tz_minuteswest = seconds_diff / 60;
+	int hours_offset;
+	_get_daylight(&hours_offset);
+    tz->tz_dsttime = hours_offset;
+  }
+ 
+  return 0;
+}
+