/***************************************************************************/
/**                                                                       **/
/** HPE CONFIDENTIAL. This software is confidential proprietary software  **/
/** licensed by Hewlett-Packard Enterprise Development, LP, and is not    **/
/** authorized to be used, duplicated OR disclosed to anyone without the  **/
/** prior written permission of HPE.                                      **/
/** © 2023 Copyright Hewlett-Packard Enterprise Development, LP           **/
/**                                                                       **/
/** VMS SOFTWARE, INC. CONFIDENTIAL. This software is confidential        **/
/** proprietary software licensed by VMS Software, Inc., and is not       **/
/** authorized to be used, duplicated or disclosed to anyone without      **/
/** the prior written permission of VMS Software, Inc.                    **/
/** © 2023 Copyright VMS Software, Inc.                                   **/
/**                                                                       **/
/***************************************************************************/
/********************************************************************************************************************************/
/* Created:  9-Nov-2023 12:06:36 by OpenVMS SDL V3.7       */
/* Source:  22-APR-1993 11:32:24 $1$DGA8345:[LIB_H.SRC]MBXDEF.SDL;1 */
/********************************************************************************************************************************/
/*** MODULE $MBXDEF ***/
#ifndef __MBXDEF_LOADED
#define __MBXDEF_LOADED 1
 
#pragma __nostandard			 /* This file uses non-ANSI-Standard features */
#pragma __member_alignment __save
#pragma __nomember_alignment
#ifdef __INITIAL_POINTER_SIZE			 /* Defined whenever ptr size pragmas supported */
#pragma __required_pointer_size __save		 /* Save the previously-defined required ptr size */
#pragma __required_pointer_size __short		 /* And set ptr size default to 32-bit pointers */
#endif
 
#ifdef __cplusplus
    extern "C" {
#define __unknown_params ...
#define __optional_params ...
#else
#define __unknown_params
#define __optional_params ...
#endif
 
#ifndef __struct
#if !defined(__VAXC)
#define __struct struct
#else
#define __struct variant_struct
#endif
#endif
 
#ifndef __union
#if !defined(__VAXC)
#define __union union
#else
#define __union variant_union
#endif
#endif
 
/*+                                                                         */
/* SHARED MEMORY MAILBOX CONTROL BLOCK DEFINITIONS                          */
/*                                                                          */
/* THERE IS ONE MAILBOX CONTROL BLOCK FOR EACH MAILBOX IN SHARED            */
/* MEMORY.  ANY PROCESSOR THAT WANTS TO ACCESS THE MAILBOX CREATES          */
/* A UCB TO CONTROL ACCESS TO THE MAILBOX.                                  */
/*-                                                                         */
#define MBX$M_ALLOC 0x1
#define MBX$M_VALID 0x2
#define MBX$M_DELPEND 0x4
#define MBX$M_QUOTALCK 0x8
#define MBX$K_LENGTH 48                 /*LENGTH OF STRUCTURE               */
#define MBX$C_LENGTH 48                 /*LENGTH OF STRUCTURE               */
#define MBX$S_MBXDEF 48
	
typedef struct _mbx {
    unsigned __int64 mbx$q_msg;         /*MESSAGE QUEUE LISTHEAD            */
    __union  {
        unsigned char mbx$b_flags;      /*FLAGS                             */
        __struct  {
            unsigned mbx$v_alloc : 1;   /* MAILBOX ALLOCATED                */
            unsigned mbx$v_valid : 1;   /* MAILBOX INITIALIZED AND USEABLE  */
            unsigned mbx$v_delpend : 1; /* DELETE PENDING                   */
            unsigned mbx$v_quotalck : 1; /* QUOTA/COUNT MODIFICATION LOCK   */
            unsigned mbx$v_fill_0_ : 4;
            } mbx$r_flags_bits;
        } mbx$r_flags_overlay;
    unsigned char mbx$b_creatport;      /*PORT NUMBER OF MAILBOX CREATOR    */
    unsigned short int mbx$w_unit;      /*MAILBOX UNIT NUMBER               */
    unsigned short int mbx$w_ref;       /*REFERENCE FLAGS (1 BIT/PORT)      */
    unsigned short int mbx$w_reader;    /*WAITING READER (1 BIT/PORT)       */
    unsigned short int mbx$w_readast;   /*WAITING READ AST (1 BIT/PORT)     */
    unsigned short int mbx$w_writast;   /*WAITING WRITE AST (1 BIT/PORT)    */
    unsigned short int mbx$w_maxmsg;    /*MAXIMUM MESSAGE SIZE              */
    unsigned short int mbx$w_msgcnt;    /*CURRENT NUMBER OF MESSAGES        */
    unsigned short int mbx$w_buffquo;   /*BUFFER QUOTA                      */
    unsigned short int mbx$w_prot;      /*PROTECTION MASK                   */
    unsigned int mbx$l_ownuic;          /*OWNER UIC                         */
    char mbx$t_name [16];               /*MAILBOX NAME (COUNTED STRING)     */
/* *** THE LENGTH OF THIS STRUCTURE MUST BE AN EVEN MULTIPLE OF 8 ***       */
/* *** BECAUSE THE MESSAGE QUEUE HEADER MUST BE QUADWORD ALIGNED ***        */
    } MBX;
 
#if !defined(__VAXC)
#define mbx$b_flags mbx$r_flags_overlay.mbx$b_flags
#define mbx$v_alloc mbx$r_flags_overlay.mbx$r_flags_bits.mbx$v_alloc
#define mbx$v_valid mbx$r_flags_overlay.mbx$r_flags_bits.mbx$v_valid
#define mbx$v_delpend mbx$r_flags_overlay.mbx$r_flags_bits.mbx$v_delpend
#define mbx$v_quotalck mbx$r_flags_overlay.mbx$r_flags_bits.mbx$v_quotalck
#endif		/* #if !defined(__VAXC) */
 
 
#pragma __member_alignment __restore
#ifdef __INITIAL_POINTER_SIZE			 /* Defined whenever ptr size pragmas supported */
#pragma __required_pointer_size __restore		 /* Restore the previously-defined required ptr size */
#endif
#ifdef __cplusplus
    }
#endif
#pragma __standard
 
#endif /* __MBXDEF_LOADED */