1 extern int printf(const char *, ...);
2 typedef unsigned short ushort;
3 struct sembuf {
4 ushort sem_num;
5 short sem_op;
6 short sem_flg;
7 };
8 union semun {
9 int val;
10 struct semid_ds *buf;
11 ushort *array;
12 struct seminfo *__buf;
13 void *__pad;
14 };
15 static union semun semctl_arg;
16 static int semid;
17 int semop(int semid, struct sembuf *sops, unsigned nsops);
18 void error (const char *);
19 int semctl(int semid, int semnum, int cmd, ...);
up(int sem)20 static void up(int sem){
21 struct sembuf sb;
22 sb.sem_num = (unsigned short) sem;
23 sb.sem_op = 1;
24 sb.sem_flg = 0x1000 ;
25 if(semop(semid, &sb, 1) == -1) error("up failure");
26 if(semctl(semid, sb.sem_num, 12 , semctl_arg) == 0)
27 printf("%s had processes sleeping on it!\n",
28 ({ "MUTEX ", "BARB_SEM 1", "BARB_SEM 2", "CUST_SEM 1",
29 "CUST_SEM 2", "WAIT_SEM 1", "WAIT_SEM 2", "WAIT_SEM 3",
30 "WAIT_SEM 4"} /* { dg-error "expected" } */
31 [( sb.sem_num )]) );
32 }
33