#include  <stdio.h>
#include  <string.h>
#include  <time.h>
#include  <pthread.h>
#include  <sys/errno.h>

#define CHECKER(exp)  do {int ret=exp;if(ret){fprintf(stderr,"[%d] "#exp" ret %d\n",__LINE__,ret);}}while(0)
static void clock_id_test(clockid_t clock_id){
  pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
  pthread_cond_t cond;
  pthread_condattr_t condattr;
  struct timespec thistime;
  char buf[64];
  memset (buf, 0, sizeof(buf));

  CHECKER(pthread_condattr_init(&condattr));
  CHECKER(pthread_condattr_setclock(&condattr, clock_id));
  CHECKER(pthread_cond_init(&cond, &condattr));

  CHECKER(pthread_mutex_lock (&mtx));
  CHECKER(clock_gettime(clock_id, &thistime));
  ctime_r(&thistime.tv_sec, buf);
  fprintf (stderr, "start %s", buf);
  thistime.tv_sec += 5;
  ctime_r(&thistime.tv_sec, buf);
  fprintf (stderr, "will wakeup at %s", buf);

  CHECKER(pthread_cond_timedwait(&cond, &mtx, &thistime));
  CHECKER(pthread_mutex_unlock(&mtx));
  CHECKER(clock_gettime(clock_id, &thistime));
  ctime_r(&thistime.tv_sec, buf);
  fprintf (stderr, "end %s", buf);
}

int main (int argc, char *argv[]) {
  fprintf(stderr,"ETIMEDOUT is %d\n", ETIMEDOUT);
  clock_id_test(CLOCK_REALTIME);
  clock_id_test(CLOCK_MONOTONIC);
  return 0;
}