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Diffstat (limited to 'usr/src/uts/common/sys/sem_impl.h')
| -rw-r--r-- | usr/src/uts/common/sys/sem_impl.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/usr/src/uts/common/sys/sem_impl.h b/usr/src/uts/common/sys/sem_impl.h new file mode 100644 index 0000000000..ecc220713d --- /dev/null +++ b/usr/src/uts/common/sys/sem_impl.h @@ -0,0 +1,123 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2004 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ +/* All Rights Reserved */ + +#ifndef _SYS_SEM_IMPL_H +#define _SYS_SEM_IMPL_H + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <sys/ipc_impl.h> +#if defined(_KERNEL) || defined(_KMEMUSER) +#include <sys/sem.h> +#include <sys/t_lock.h> +#include <sys/avl.h> +#include <sys/list.h> +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Argument vectors for the various flavors of semsys(). + */ + +#define SEMCTL 0 +#define SEMGET 1 +#define SEMOP 2 +#define SEMIDS 3 +#define SEMTIMEDOP 4 + +#if defined(_KERNEL) || defined(_KMEMUSER) + +/* + * There is one semaphore id data structure (semid_ds) for each set of + * semaphores in the system. + */ +typedef struct ksemid { + kipc_perm_t sem_perm; /* operation permission struct */ + struct sem *sem_base; /* ptr to first semaphore in set */ + ushort_t sem_nsems; /* # of semaphores in set */ + time_t sem_otime; /* last semop time */ + time_t sem_ctime; /* last change time */ + int sem_binary; /* flag indicating semaphore type */ + int sem_maxops; /* maximum number of operations */ + list_t sem_undos; /* list of undo structures */ +} ksemid_t; + +/* + * There is one semaphore structure (sem) for each semaphore in the system. + */ +struct sem { + ushort_t semval; /* semaphore value */ + pid_t sempid; /* pid of last operation */ + ushort_t semncnt; /* # awaiting semval > cval */ + ushort_t semzcnt; /* # awaiting semval = 0 */ + kcondvar_t semncnt_cv; + kcondvar_t semzcnt_cv; +}; + +/* + * There is one undo structure per process in the system. + */ +struct sem_undo { + avl_node_t un_avl; /* node in per-process avl tree */ + list_node_t un_list; /* ptr to next active undo structure */ + proc_t *un_proc; /* back-pointer to process */ + ksemid_t *un_sp; /* back-pointer to semaphore */ + int un_aoe[1]; /* adjust on exit values */ +}; +#endif /* _KERNEL */ + +#if defined(_SYSCALL32) +/* + * LP64 view of the ILP32 semid_ds structure + */ +struct semid_ds32 { + struct ipc_perm32 sem_perm; /* operation permission struct */ + caddr32_t sem_base; /* ptr to first semaphore in set */ + uint16_t sem_nsems; /* # of semaphores in set */ + time32_t sem_otime; /* last semop time */ + int32_t sem_pad1; /* reserved for time_t expansion */ + time32_t sem_ctime; /* last semop time */ + int32_t sem_pad2; /* reserved for time_t expansion */ + int32_t sem_binary; /* flag indicating semaphore type */ + int32_t sem_pad3[3]; /* reserve area */ +}; +#endif + +#ifdef _KERNEL +extern void semexit(proc_t *); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_SEM_IMPL_H */ |