include/sys/sem_impl.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #ifndef _SYS_SEM_IMPL_H
  31 #define _SYS_SEM_IMPL_H
  32
  33 #pragma ident   "%Z%%M% %I%     %E% SMI"
  34
  35 #include <sys/ipc_impl.h>
  36 #if defined(_KERNEL) || defined(_KMEMUSER)
  37 #include <sys/sem.h>
  38 #include <sys/t_lock.h>
  39 #include <sys/avl.h>
  40 #include <sys/list.h>
  41 #endif
  42
  43 #ifdef  __cplusplus
  44 extern "C" {
  45 #endif
  46
  47 /*
  48  * Argument vectors for the various flavors of semsys().
  49  */
  50
  51 #define SEMCTL  0
  52 #define SEMGET  1
  53 #define SEMOP   2
  54 #define SEMIDS  3
  55 #define SEMTIMEDOP      4
  56
  57 #if defined(_KERNEL) || defined(_KMEMUSER)
  58
  59 /*
  60  * There is one semaphore id data structure (semid_ds) for each set of
  61  * semaphores in the system.
  62  */
  63 typedef struct ksemid {
  64         kipc_perm_t     sem_perm;       /* operation permission struct */
  65         struct sem      *sem_base;      /* ptr to first semaphore in set */
  66         ushort_t        sem_nsems;      /* # of semaphores in set */
  67         time_t          sem_otime;      /* last semop time */
  68         time_t          sem_ctime;      /* last change time */
  69         int             sem_binary;     /* flag indicating semaphore type */
  70         int             sem_maxops;     /* maximum number of operations */
  71         list_t          sem_undos;      /* list of undo structures */
  72 } ksemid_t;
  73
  74 /*
  75  * There is one semaphore structure (sem) for each semaphore in the system.
  76  */
  77 struct sem {
  78         ushort_t        semval;         /* semaphore value */
  79         pid_t           sempid;         /* pid of last operation */
  80         ushort_t        semncnt;        /* # awaiting semval > cval */
  81         ushort_t        semzcnt;        /* # awaiting semval = 0 */
  82         kcondvar_t      semncnt_cv;
  83         kcondvar_t      semzcnt_cv;
  84 };
  85
  86 /*
  87  * There is one undo structure per process in the system.
  88  */
  89 struct sem_undo {
  90         avl_node_t      un_avl;         /* node in per-process avl tree */
  91         list_node_t     un_list;        /* ptr to next active undo structure */
  92         proc_t          *un_proc;       /* back-pointer to process */
  93         ksemid_t        *un_sp;         /* back-pointer to semaphore */
  94         int             un_aoe[1];      /* adjust on exit values */
  95 };
  96 #endif  /* _KERNEL */
  97
  98 #if defined(_SYSCALL32)
  99 /*
 100  * LP64 view of the ILP32 semid_ds structure
 101  */
 102 struct semid_ds32 {
 103         struct ipc_perm32 sem_perm;     /* operation permission struct */
 104         caddr32_t       sem_base;       /* ptr to first semaphore in set */
 105         uint16_t        sem_nsems;      /* # of semaphores in set */
 106         time32_t        sem_otime;      /* last semop time */
 107         int32_t         sem_pad1;       /* reserved for time_t expansion */
 108         time32_t        sem_ctime;      /* last semop time */
 109         int32_t         sem_pad2;       /* reserved for time_t expansion */
 110         int32_t         sem_binary;     /* flag indicating semaphore type */
 111         int32_t         sem_pad3[3];    /* reserve area */
 112 };
 113 #endif
 114
 115 #ifdef _KERNEL
 116 extern void semexit(proc_t *);
 117 #endif
 118
 119 #ifdef  __cplusplus
 120 }
 121 #endif
 122
 123 #endif  /* _SYS_SEM_IMPL_H */