6d0fe480a8
POSIX explicitly states that the application must declare union semun. This makes no sense, but it is what it is. This brings us into line with Linux, MacOS/Darwin, and NetBSD. In a ports exp-run a moderate number of ports fail due to a lack of approprate autotools-like discovery mechanisms or local patches. A commit to address them will follow shortly. PR: 224300, 224443 (exp-run) Reviewed by: emaste, jhb, kib Exp-run by: antoine Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D14492
160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: sem.h,v 1.5 1994/06/29 06:45:15 cgd Exp $ */
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/*
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* SVID compatible sem.h file
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*
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* Author: Daniel Boulet
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*/
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#ifndef _SYS_SEM_H_
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#define _SYS_SEM_H_
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#ifdef _WANT_SYSVSEM_INTERNALS
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#define _WANT_SYSVIPC_INTERNALS
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#endif
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#include <sys/ipc.h>
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#ifndef _PID_T_DECLARED
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typedef __pid_t pid_t;
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#define _PID_T_DECLARED
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#endif
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#ifndef _SIZE_T_DECLARED
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typedef __size_t size_t;
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#define _SIZE_T_DECLARED
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#endif
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#ifndef _TIME_T_DECLARED
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typedef __time_t time_t;
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#define _TIME_T_DECLARED
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#endif
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#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
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defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7)
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struct semid_ds_old {
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struct ipc_perm_old sem_perm; /* operation permission struct */
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struct sem *__sem_base; /* pointer to first semaphore in set */
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unsigned short sem_nsems; /* number of sems in set */
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time_t sem_otime; /* last operation time */
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long sem_pad1; /* SVABI/386 says I need this here */
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time_t sem_ctime; /* last change time */
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/* Times measured in secs since */
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/* 00:00:00 UTC, Jan. 1, 1970, without leap seconds */
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long sem_pad2; /* SVABI/386 says I need this here */
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long sem_pad3[4]; /* SVABI/386 says I need this here */
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};
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#endif
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struct semid_ds {
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struct ipc_perm sem_perm; /* operation permission struct */
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struct sem *__sem_base; /* pointer to first semaphore in set */
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unsigned short sem_nsems; /* number of sems in set */
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time_t sem_otime; /* last operation time */
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time_t sem_ctime; /* last change time */
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/* Times measured in secs since */
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/* 00:00:00 UTC, Jan. 1, 1970, without leap seconds */
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};
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/*
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* semop's sops parameter structure
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*/
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struct sembuf {
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unsigned short sem_num; /* semaphore # */
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short sem_op; /* semaphore operation */
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short sem_flg; /* operation flags */
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};
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#define SEM_UNDO 010000
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#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
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defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) || \
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defined(_WANT_SEMUN_OLD)
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union semun_old {
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int val; /* value for SETVAL */
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struct semid_ds_old *buf; /* buffer for IPC_STAT & IPC_SET */
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unsigned short *array; /* array for GETALL & SETALL */
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};
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#endif
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#if defined(_KERNEL) || defined(_WANT_SEMUN)
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/*
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* semctl's arg parameter structure
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*/
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union semun {
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int val; /* value for SETVAL */
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struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
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unsigned short *array; /* array for GETALL & SETALL */
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};
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#endif
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/*
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* commands for semctl
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*/
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#define GETNCNT 3 /* Return the value of semncnt {READ} */
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#define GETPID 4 /* Return the value of sempid {READ} */
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#define GETVAL 5 /* Return the value of semval {READ} */
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#define GETALL 6 /* Return semvals into arg.array {READ} */
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#define GETZCNT 7 /* Return the value of semzcnt {READ} */
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#define SETVAL 8 /* Set the value of semval to arg.val {ALTER} */
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#define SETALL 9 /* Set semvals from arg.array {ALTER} */
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#define SEM_STAT 10 /* Like IPC_STAT but treats semid as sema-index */
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#define SEM_INFO 11 /* Like IPC_INFO but treats semid as sema-index */
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/*
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* Permissions
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*/
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#define SEM_A IPC_W /* alter permission */
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#define SEM_R IPC_R /* read permission */
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#if defined(_KERNEL) || defined(_WANT_SYSVSEM_INTERNALS)
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/*
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* semaphore info struct
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*/
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struct seminfo {
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int semmni; /* # of semaphore identifiers */
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int semmns; /* # of semaphores in system */
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int semmnu; /* # of undo structures in system */
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int semmsl; /* max # of semaphores per id */
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int semopm; /* max # of operations per semop call */
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int semume; /* max # of undo entries per process */
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int semusz; /* size in bytes of undo structure */
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int semvmx; /* semaphore maximum value */
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int semaem; /* adjust on exit max value */
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};
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/*
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* Kernel wrapper for the user-level structure
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*/
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struct semid_kernel {
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struct semid_ds u;
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struct label *label; /* MAC framework label */
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struct ucred *cred; /* creator's credentials */
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};
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/* internal "mode" bits */
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#define SEM_ALLOC 01000 /* semaphore is allocated */
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#define SEM_DEST 02000 /* semaphore will be destroyed on last detach */
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#endif
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#ifdef _KERNEL
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extern struct seminfo seminfo;
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/*
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* Process sem_undo vectors at proc exit.
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*/
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void semexit(struct proc *p);
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#else /* !_KERNEL */
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__BEGIN_DECLS
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#if __BSD_VISIBLE
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int semsys(int, ...);
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#endif
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int semctl(int, int, int, ...);
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int semget(key_t, int, int);
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int semop(int, struct sembuf *, size_t);
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_SYS_SEM_H_ */
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