clock.c raw

   1  #include <time.h>
   2  #include <limits.h>
   3  
   4  clock_t clock()
   5  {
   6  	struct timespec ts;
   7  
   8  	if (__clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts))
   9  		return -1;
  10  
  11  	if (ts.tv_sec > LONG_MAX/1000000
  12  	 || ts.tv_nsec/1000 > LONG_MAX-1000000*ts.tv_sec)
  13  		return -1;
  14  
  15  	return ts.tv_sec*1000000 + ts.tv_nsec/1000;
  16  }
  17