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 *
tf(void * arg)12 tf (void *arg)
13 {
14 #ifdef PREPARE
15   PREPARE
16 #endif
17   SEM_WAIT (arg);
18   return NULL;
19 }
20 
21 int
main(void)22 main (void)
23 {
24   int tries = 5;
25   pthread_t th;
26   union
27   {
28     sem_t s;
29     struct new_sem ns;
30   } u;
31  again:
32   if (sem_init (&u.s, 0, 0) != 0)
33     {
34       puts ("sem_init failed");
35       return 1;
36     }
37 #if __HAVE_64B_ATOMICS
38   if ((u.ns.data >> SEM_NWAITERS_SHIFT) != 0)
39 #else
40   if (u.ns.nwaiters != 0)
41 #endif
42     {
43       puts ("nwaiters not initialized");
44       return 1;
45     }
46 
47   if (pthread_create (&th, NULL, tf, &u.s) != 0)
48     {
49       puts ("pthread_create failed");
50       return 1;
51     }
52 
53   sleep (1);
54 
55   if (pthread_cancel (th) != 0)
56     {
57       puts ("pthread_cancel failed");
58       return 1;
59     }
60 
61   void *r;
62   if (pthread_join (th, &r) != 0)
63     {
64       puts ("pthread_join failed");
65       return 1;
66     }
67   if (r != PTHREAD_CANCELED && --tries > 0)
68     {
69       /* Maybe we get the scheduling right the next time.  */
70       sem_destroy (&u.s);
71       goto again;
72     }
73 
74 #if __HAVE_64B_ATOMICS
75   if ((u.ns.data >> SEM_NWAITERS_SHIFT) != 0)
76 #else
77   if (u.ns.nwaiters != 0)
78 #endif
79     {
80       puts ("nwaiters not reset");
81       return 1;
82     }
83 
84   return 0;
85 }
86