1 #ifndef _UAPI_LINUX_SEM_H
2 #define _UAPI_LINUX_SEM_H
7 #define SEM_UNDO 0x1000 /* undo the operation on exit */
9 /* semctl Command Definitions. */
10 #define GETPID 11 /* get sempid */
11 #define GETVAL 12 /* get semval */
12 #define GETALL 13 /* get all semval's */
13 #define GETNCNT 14 /* get semncnt */
14 #define GETZCNT 15 /* get semzcnt */
15 #define SETVAL 16 /* set semval */
16 #define SETALL 17 /* set all semval's */
22 /* Obsolete, used only for backwards compatibility and libc5 compiles */
24 struct ipc_perm sem_perm; /* permissions .. see ipc.h */
25 __kernel_time_t sem_otime; /* last semop time */
26 __kernel_time_t sem_ctime; /* last change time */
27 struct sem *sem_base; /* ptr to first semaphore in array */
28 struct sem_queue *sem_pending; /* pending operations to be processed */
29 struct sem_queue **sem_pending_last; /* last pending operation */
30 struct sem_undo *undo; /* undo requests on this array */
31 unsigned short sem_nsems; /* no. of semaphores in array */
34 /* Include the definition of semid64_ds */
35 #include <asm/sembuf.h>
37 /* semop system calls takes an array of these. */
39 unsigned short sem_num; /* semaphore index in array */
40 short sem_op; /* semaphore operation */
41 short sem_flg; /* operation flags */
44 /* arg for semctl system calls. */
46 int val; /* value for SETVAL */
47 struct semid_ds __user *buf; /* buffer for IPC_STAT & IPC_SET */
48 unsigned short __user *array; /* array for GETALL & SETALL */
49 struct seminfo __user *__buf; /* buffer for IPC_INFO */
66 #define SEMMNI 128 /* <= IPCMNI max # of semaphore identifiers */
67 #define SEMMSL 250 /* <= 8 000 max num of semaphores per id */
68 #define SEMMNS (SEMMNI*SEMMSL) /* <= INT_MAX max # of semaphores in system */
69 #define SEMOPM 32 /* <= 1 000 max num of ops per semop call */
70 #define SEMVMX 32767 /* <= 32767 semaphore maximum value */
71 #define SEMAEM SEMVMX /* adjust on exit max value */
74 #define SEMUME SEMOPM /* max num of undo entries per process */
75 #define SEMMNU SEMMNS /* num of undo structures system wide */
76 #define SEMMAP SEMMNS /* # of entries in semaphore map */
77 #define SEMUSZ 20 /* sizeof struct sem_undo */
80 #endif /* _UAPI_LINUX_SEM_H */