Example Timer Usage for T3D (C) (cont'd)

         #include <unistd.h>
         #include <time.h>
         #include <stdio.h>
         
         #define WAIT_TIME       7       /* time to wait in the delay loop */
         
         #define tick_secs(ticks, clock_ticks)   ((double)(ticks)/ \
                                                 (double)(clock_ticks))
         
         int main()
         {
                 long start_time;        /* time at which the timed section started */
                 long end_time;          /* time at which the timed section ended */
                 long total_time;        /* total time for the timed section */
         
                 long calibration;       /* time spent within the rtclock() function */
         
                 long clock_ticks;       /* number of clock ticks per second */
         
                 clock_ticks = sysconf(_SC_CLK_TCK);
         
                 (void) rtclock();
         
                 start_time = rtclock(); end_time = rtclock();
                 calibration = end_time - start_time;
         
                 start_time = rtclock();
                 (void) sleep(WAIT_TIME);        /* timed portion of the code */
                 end_time = rtclock();
         
                 total_time = end_time - start_time - calibration;
         
                 (void) printf("%s%f\t%s%ld\n\t%s%ld\t\t%s%ld\n",
                         "time (secs): ", tick_secs(total_time, clock_ticks),
                         "time (ticks): ", total_time,
                         "calibration (ticks): ", calibration,
                         "ticks per second: ", clock_ticks);
         
                 return(0);
         }

Generated with CERN WebMaker