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Annotation of coherent/f/usr/include.78/sys/sem.h, revision 1.1

1.1     ! root        1: /* (-lgl
        !             2:  *     COHERENT Version 4.0
        !             3:  *     Copyright (c) 1982, 1993 by Mark Williams Company.
        !             4:  *     All rights reserved. May not be copied without permission.
        !             5:  -lgl) */
        !             6: /*
        !             7:  * /usr/include/sys/sem.h
        !             8:  *
        !             9:  * IPC Semaphore Facility
        !            10:  *
        !            11:  * Revised: Mon Apr 19 13:52:49 1993 CDT
        !            12:  */
        !            13: #ifndef __SYS_SEM_H__
        !            14: #define __SYS_SEM_H__
        !            15: 
        !            16: #include <sys/ipc.h>
        !            17: #include <sys/_time.h>
        !            18: 
        !            19: /*
        !            20:  * Permission Definitions.
        !            21:  */
        !            22: #define        SEM_A   0200            /* alter permission */
        !            23: #define        SEM_R   0400            /* read permission */
        !            24: 
        !            25: /*
        !            26:  * Semaphore Operation Flags.
        !            27:  */
        !            28: #define SEM_UNDO 010000                /* set up adjust on exit entry */
        !            29: 
        !            30: /*
        !            31:  * Semctl Command Definitions.
        !            32:  */
        !            33: #define        GETNCNT 3               /* get semncnt */
        !            34: #define        GETPID  4               /* get sempid  */
        !            35: #define        GETVAL  5               /* get semval  */
        !            36: #define        GETALL  6               /* get all semval's */
        !            37: #define        GETZCNT 7               /* get semzcnt */
        !            38: #define        SETVAL  8               /* set semval  */
        !            39: #define        SETALL  9               /* set all semval's */
        !            40: 
        !            41: /*
        !            42:  * Structure Definitions.
        !            43:  */
        !            44: 
        !            45: /*
        !            46:  * There is one semaphore structure for each semaphore in the system.
        !            47:  */
        !            48: struct sem {
        !            49:        unsigned short  semval;         /* semaphore value */
        !            50:        short           sempid;         /* pid of last operation */
        !            51:        unsigned short  semncnt;        /* # awaiting semval > cval */
        !            52:        unsigned short  semzcnt;        /* # awaiting semval = 0 */
        !            53: };
        !            54: 
        !            55: /*
        !            56:  * There is one semaphore id data structure for each set of semaphores
        !            57:  * in the system.
        !            58:  */
        !            59: struct semid_ds {
        !            60:        struct ipc_perm sem_perm;       /* semaphore permission struct */
        !            61:        struct sem      *sem_base;      /* pointer to first semaphore in set */
        !            62:        unsigned short  sem_nsems;      /* # of semaphores in set */
        !            63:        time_t          sem_otime;      /* last semop time */
        !            64:        time_t          sem_ctime;      /* last change time */
        !            65: };
        !            66: 
        !            67: /*
        !            68:  * There is one link list of undo structures per process.
        !            69:  */
        !            70: struct sem_undo {
        !            71:        struct sem_undo *un_np;         /* ptr to next active undo structure */
        !            72:        short           un_aoe;         /* adjust on exit values */
        !            73:        short           un_num;         /* semaphore # */
        !            74:        int             un_id;          /* semid */
        !            75: };
        !            76: 
        !            77: /*
        !            78:  * User semaphore template for semop system calls.
        !            79:  */
        !            80: struct sembuf {
        !            81:        unsigned short  sem_num;        /* semaphore # */
        !            82:        short           sem_op;         /* semaphore operation */
        !            83:        short           sem_flg;        /* operation flags */
        !            84: };
        !            85: 
        !            86: /*
        !            87:  * Ioctl commands issued to Semaphore device driver (Coherent 286 specific).
        !            88:  */
        !            89: #define        SEMIOC  ('S'<<8)
        !            90: #define        SEMCTL  (SEMIOC|0)
        !            91: #define        SEMGET  (SEMIOC|1)
        !            92: #define        SEMOP   (SEMIOC|2)
        !            93: 
        !            94: #endif /* __SYS_SEM_H__ */

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