109 lines
2.8 KiB
C
109 lines
2.8 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>
|
|
|
|
struct sem;
|
|
|
|
struct semid_ds {
|
|
struct ipc_perm sem_perm; /* operation permission struct */
|
|
struct sem *sem_base; /* pointer to first semaphore in set */
|
|
u_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 */
|
|
};
|
|
|
|
/*
|
|
* semop's sops parameter structure
|
|
*/
|
|
struct sembuf {
|
|
u_short sem_num; /* semaphore # */
|
|
short sem_op; /* semaphore operation */
|
|
short sem_flg; /* operation flags */
|
|
};
|
|
#define SEM_UNDO 010000
|
|
|
|
/*
|
|
* semctl's arg parameter structure
|
|
*/
|
|
union semun {
|
|
int val; /* value for SETVAL */
|
|
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
|
|
u_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 semmap, /* # of entries in semaphore map */
|
|
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;
|
|
|
|
/* 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);
|
|
#endif /* _KERNEL */
|
|
|
|
#ifndef _KERNEL
|
|
#include <sys/cdefs.h>
|
|
|
|
__BEGIN_DECLS
|
|
int semsys(int, ...);
|
|
int semctl(int, int, int, ...);
|
|
int semget(key_t, int, int);
|
|
int semop(int, struct sembuf *,unsigned);
|
|
__END_DECLS
|
|
#endif /* !_KERNEL */
|
|
|
|
#endif /* !_SEM_H_ */
|