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code:

//gettimeofday

#include <sys/time.h>
#include <windows.h>

//prototipo
int gettimeofday(struct timeval *tp, void *tzp);

int gettimeofday(struct timeval* tp, void* tzp){
 union {
        /*tempo passato dal 1 Gennaio 1601 (in centinaia di nanosec) */
        long long ns100; 
        FILETIME ft;
        } _now;
 GetSystemTimeAsFileTime( &(_now.ft) );
 //microsecondi
 tp->tv_usec=(long)((_now.ns100 / 10LL) % 1000000LL );
 //secondi dal 1 gennaio 1970
 tp->tv_sec= (long)((_now.ns100-(116444736000000000LL))/10000000LL); 
 return (0);
}