helgrind/tests/sem_clockwait_np.c

   1 // this is a variation of bug484480.c using sem_clockwait_np
   2
   3 #include <pthread.h>
   4 #include <semaphore.h>
   5 #include <stdio.h>
   6 #include <time.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10 static char* result;
  11 static sem_t sem;
  12
  13 static void* func(void* data)
  14 {
  15    result = "Finished!";
  16    sem_post(&sem);
  17    return NULL;
  18 }
  19
  20 int main(void)
  21 {
  22    sem_init(&sem, 0, 0);
  23
  24    pthread_t tid;
  25    pthread_create(&tid, NULL, func, NULL);
  26
  27    struct timespec ts = {0, 100000};
  28    struct timespec ts_remain;
  29
  30    while (sem_clockwait_np(&sem, CLOCK_REALTIME, 0, &ts, &ts_remain))
  31       ; // do nothing but keep retrying
  32
  33    printf("%s\n", result);
  34
  35    pthread_join(tid, NULL);
  36 }