int main(int argc, char ** argv ) {
struct timespec cur;
struct timeval tv1,tv2;
if( argc < 4 ) {
fprintf( stderr, "Usage: %s <num> <num> <num>...\n", argv[0] );
exit( EXIT_FAILURE );
}
int fd = timerfd_create( CLOCK_MONOTONIC, 0 );
clock_gettime( CLOCK_MONOTONIC, &cur );
struct itimerspec val;
val.it_value.tv_sec = cur.tv_sec + atoi( argv[1] );
val.it_value.tv_nsec = 0;
val.it_interval.tv_sec = atoi( argv[2] );
val.it_interval.tv_nsec = 0;
timerfd_settime( fd, TFD_TIMER_ABSTIME, &val, 0 );
gettimeofday( &tv1, 0 );
uint64_t read_cnt;
int cnt;
for( cnt = 0; cnt < atoi( argv[3] ); cnt ++ ) {
read( fd, &read_cnt, sizeof( uint64_t ));
gettimeofday( &tv2, 0 );
double rtn = TV2SEC( tv2 ) - TV2SEC( tv1 );
printf( "timerfd %d Path... [%f]\n", cnt + 1, rtn );
tv1 = tv2;
}
close( fd );
exit( EXIT_SUCCESS );
}
/* Return wall-clock time. */
double SNetRealTime(void)
{
#ifdef CLOCK_REALTIME
struct timespec ts = { 0, 0 };
int r = clock_gettime(CLOCK_REALTIME, &ts);
CHECK(r);
return TS2SEC(ts);
#else /* __APPLE__ || __MACH__ */
struct timeval tv = { 0, 0 };
int r = gettimeofday(&tv, NULL); \
CHECK(r);
return TV2SEC(&tv);
#endif
}
/* Convert a struct timeval to number of seconds as a double. */
double SNetTimeToDouble(snet_time_t *time)
{
return TV2SEC(time);
}