61f26cae7d
(UTC) rather than the archaic (GMT) in comments. Except where the comments are making fun of people doing this (and pedants who insist on the new terms).
154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
/* $FreeBSD$ */
|
|
/* $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 UTC, Jan. 1, 1970, without leap seconds */
|
|
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 UTC, Jan. 1, 1970, without leap seconds */
|
|
};
|
|
|
|
/*
|
|
* 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_ */
|