+/*
+ * example of gettimeofday usage
+ *
+ */
+
+#include <stdio.h>
+#include <sys/time.h>
+#include <time.h> // only needed for time command (random seed)
+#include <stdlib.h>
+
+int main(int argc,char **argv) {
+
+ struct timeval foo1;
+ struct timeval foo2;
+ int sec,usec;
+ int i;
+
+ srand(time(NULL)); // random seed
+
+ printf("time 1:\n");
+ gettimeofday(&foo1,NULL);
+ printf("seconds: %d \t usec: %d\n",(int)foo1.tv_sec,(int)foo1.tv_usec);
+
+ while(i<rand()) i++;
+
+ gettimeofday(&foo2,NULL);
+ printf("time 2:\n");
+ printf("seconds: %d \t usec: %d\n\n",(int)foo2.tv_sec,(int)foo2.tv_usec);
+
+ sec=foo2.tv_sec-foo1.tv_sec;
+ sec=(foo2.tv_usec<foo1.tv_usec)?sec-1:sec;
+ usec=(foo2.tv_usec<foo1.tv_usec)?1000000-foo1.tv_usec+foo2.tv_usec
+ :foo2.tv_usec-foo1.tv_usec;
+ printf("delta t = %d sec %d usec\n",sec,usec);
+
+ return 1;
+}