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/* $FreeBSD$ */
/* $NetBSD: sem.h,v 1.5 1994/06/29 06:45:15 cgd Exp $ */
/*
* SVID compatible sem.h file
*
* Author: Daniel Boulet
*/
#ifndef _SYS_SEM_H_
#define _SYS_SEM_H_
#include <sys/ipc.h>
#ifndef _PID_T_DECLARED
typedef __pid_t pid_t;
#define _PID_T_DECLARED
#endif
#ifndef _SIZE_T_DECLARED
typedef __size_t size_t;
#define _SIZE_T_DECLARED
#endif
#ifndef _TIME_T_DECLARED
typedef __time_t time_t;
#define _TIME_T_DECLARED
#endif
#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7)
struct semid_ds_old {
struct ipc_perm_old sem_perm; /* operation permission struct */
struct sem *sem_base; /* pointer to first semaphore in set */
unsigned short sem_nsems; /* number of sems in set */
time_t sem_otime; /* last operation time */
long sem_pad1; /* SVABI/386 says I need this here */
time_t sem_ctime; /* last change time */
/* Times measured in secs since */
/* 00:00:00 GMT, Jan. 1, 1970 */
long sem_pad2; /* SVABI/386 says I need this here */
long sem_pad3[4]; /* SVABI/386 says I need this here */
};
#endif
struct semid_ds {
struct ipc_perm sem_perm; /* operation permission struct */
struct sem *sem_base; /* pointer to first semaphore in set */
unsigned short sem_nsems; /* number of sems in set */
time_t sem_otime; /* last operation time */
time_t sem_ctime; /* last change time */
/* Times measured in secs since */
/* 00:00:00 GMT, Jan. 1, 1970 */
};
/*
* semop's sops parameter structure
*/
struct sembuf {
unsigned short sem_num; /* semaphore # */
short sem_op; /* semaphore operation */
short sem_flg; /* operation flags */
};
#define SEM_UNDO 010000
#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) || \
defined(_WANT_SEMUN_OLD)
union semun_old {
int val; /* value for SETVAL */
struct semid_ds_old *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short *array; /* array for GETALL & SETALL */
};
#endif
/*
* semctl's arg parameter structure
*/
union semun {
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short *array; /* array for GETALL & SETALL */
};
/*
* commands for semctl
*/
#define GETNCNT 3 /* Return the value of semncnt {READ} */
#define GETPID 4 /* Return the value of sempid {READ} */
#define GETVAL 5 /* Return the value of semval {READ} */
#define GETALL 6 /* Return semvals into arg.array {READ} */
#define GETZCNT 7 /* Return the value of semzcnt {READ} */
#define SETVAL 8 /* Set the value of semval to arg.val {ALTER} */
#define SETALL 9 /* Set semvals from arg.array {ALTER} */
#define SEM_STAT 10 /* Like IPC_STAT but treats semid as sema-index */
#define SEM_INFO 11 /* Like IPC_INFO but treats semid as sema-index */
/*
* Permissions
*/
#define SEM_A IPC_W /* alter permission */
#define SEM_R IPC_R /* read permission */
#ifdef _KERNEL
/*
* semaphore info struct
*/
struct seminfo {
int semmni, /* # of semaphore identifiers */
semmns, /* # of semaphores in system */
semmnu, /* # of undo structures in system */
semmsl, /* max # of semaphores per id */
semopm, /* max # of operations per semop call */
semume, /* max # of undo entries per process */
semusz, /* size in bytes of undo structure */
semvmx, /* semaphore maximum value */
semaem; /* adjust on exit max value */
};
extern struct seminfo seminfo;
/*
* Kernel wrapper for the user-level structure
*/
struct semid_kernel {
struct semid_ds u;
struct label *label; /* MAC framework label */
struct ucred *cred; /* creator's credentials */
};
/* internal "mode" bits */
#define SEM_ALLOC 01000 /* semaphore is allocated */
#define SEM_DEST 02000 /* semaphore will be destroyed on last detach */
/*
* Process sem_undo vectors at proc exit.
*/
void semexit(struct proc *p);
#else /* ! _KERNEL */
__BEGIN_DECLS
#if __BSD_VISIBLE
int semsys(int, ...);
#endif
int semctl(int, int, int, ...);
int semget(key_t, int, int);
int semop(int, struct sembuf *, size_t);
__END_DECLS
#endif /* !_KERNEL */
#endif /* !_SYS_SEM_H_ */
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