nptl/tst-sem11.c

   1 #include <semaphore.h>
   2 #include <stdio.h>
   3 #include <unistd.h>
   4 #include <pthread.h>
   5 #include <internaltypes.h>
   6
   7 #ifndef SEM_WAIT
   8 # define SEM_WAIT(s) sem_wait (s)
   9 #endif
  10
  11 static void *
  12 tf (void *arg)
  13 {
  14 #ifdef PREPARE
  15   PREPARE
  16 #endif
  17   SEM_WAIT (arg);
  18   return NULL;
  19 }
  20
  21 int
  22 main (void)
  23 {
  24   int tries = 5;
  25   pthread_t th;
  26   sem_t s;
  27  again:
  28   if (sem_init (&s, 0, 0) != 0)
  29     {
  30       puts ("sem_init failed");
  31       return 1;
  32     }
  33
  34   struct new_sem *is = (struct new_sem *) &s;
  35
  36   if (is->nwaiters != 0)
  37     {
  38       puts ("nwaiters not initialized");
  39       return 1;
  40     }
  41
  42   if (pthread_create (&th, NULL, tf, &s) != 0)
  43     {
  44       puts ("pthread_create failed");
  45       return 1;
  46     }
  47
  48   sleep (1);
  49
  50   if (pthread_cancel (th) != 0)
  51     {
  52       puts ("pthread_cancel failed");
  53       return 1;
  54     }
  55
  56   void *r;
  57   if (pthread_join (th, &r) != 0)
  58     {
  59       puts ("pthread_join failed");
  60       return 1;
  61     }
  62   if (r != PTHREAD_CANCELED && --tries > 0)
  63     {
  64       /* Maybe we get the scheduling right the next time.  */
  65       sem_destroy (&s);
  66       goto again;
  67     }
  68
  69   if (is->nwaiters != 0)
  70     {
  71       puts ("nwaiters not reset");
  72       return 1;
  73     }
  74
  75   return 0;
  76 }