Category : Alternate Operating Systems - Quarterdeck DesqView, CP/M, etc
Archive   : VMIXUTL.ZIP
Filename : IO_OBJ.H

/*****************************************************************************
* ComSoft Library -- io_obj.h Copyright (C)1985-1992 by J. Anthony Borras
*
* DATE: Sept. 22, 1985 07-04-90
*
* NAME: io_obj.h -- include file for object types
*
* SYNOPSIS:
* #INCLUDE "io_obj.h"
*
* FUNCTION:
* This header file includes the object type structures
* and definitions.
*
* RETURNS:
* = N/A
*
*****************************************************************************/


/* Object type name definitions */

#define PROCESS 0 /* type proc */
#define SRCSINK 1 /* type tty terminal */
#define CHRSINK 2 /* type prn printer */
#define DSKFILE 4 /* type df */
#define MEMORY 5 /* type mf */
#define BLKSINK 6 /* type dsk disk */
#define MANAGER 7 /* type sys proc */
#define MAILBOX 8 /* type mbox */
#define DATLINK 9 /* type dlc data link layer */


/* Object ostate constants */

#define OSTATE_FREE 0 /* object available */
#define OSTATE_READY 1 /* object available */
#define OSTATE_ASSIGNED 2 /* channel assigned to object */


/* Object status constants */

#define OCB_CHAR 0x00000001L
#define OCB_BLOCK 0x00000002L
#define OCB_SPOOL 0x00000004L
#define OCB_MOUNT 0x00000008L
#define OCB_PROC 0x00000010L
#define OCB_MBOX 0x00000020L
#define OCB_NET 0x00000040L
#define OCB_FREE 0x00000100L
#define OCB_ALLOC 0x00000200L
#define OCB_MAYALLOC 0x00000400L
#define OCB_OFFLINE 0x00000800L
#define OCB_SHARE 0x00001000L
#define OCB_SYSTEM 0x00002000L
#define OCB_FOD 0x00004000L
#define OCB_MGR 0x00008000L


/* Control queue sizes */

#define SYS_NTTY 5
#define SYS_NPRN 2
#define SYS_NDSK 0
#define SYS_NDF 0
#define SYS_NMF 2
#define SYS_NVOM 10


/* Object Structure Declarations
Object Control Block in io data base */

struct OCB /* one for each object type */

{
unsigned int type; /* object type */
unsigned int prvlev; /* privilege level for allocate */
char *eqvname; /* object name */
unsigned int machine; /* machine ID */
unsigned int index;
unsigned long osl; /* object 32bit status */
unsigned int csr; /* object hardware port address */
unsigned int *ivec; /* interrupt vector address */
unsigned int *ovec; /* interrupt vector address */
unsigned int minor; /* multiple object copies */
unsigned int refcnt; /* multiple channels serviced */
unsigned int mgr_uid; /* uid of object manager */
void (*obj_mgr)(struct IRP *); /* strategy entry for obj driver */
unsigned int *irphead; /* io request packet queue head */
unsigned int *irptail; /* io request packet queue tail */
SYSCALL (*obj_read)(); /* manager high level function */
SYSCALL (*obj_write)(); /* manager high level function */
SYSCALL (*obj_seek)(); /* manager high level function */
SYSCALL (*obj_getc)(); /* manager high level function */
SYSCALL (*obj_putc)(); /* manager high level function */
SYSCALL (*obj_init)(); /* manager high level function */
SYSCALL (*obj_open)(); /* manager high level function */
SYSCALL (*obj_close)(); /* manager high level function */
SYSCALL (*obj_cntl)(); /* manager high level function */
int (*obj_ievent)(); /* interrupt dispatch routine */
int (*obj_oevent)(); /* interrupt dispatch routine */
};

extern struct OCB io0as_objtab[SYS_MAXTYP];
#define OCBSIZ sizeof(struct OCB)


/* Object Structure Declarations
Terminal Description Block in io data base */

struct TDB /* one for each terminal type */

{
unsigned long home; /* home cursor */
unsigned long clear; /* clear screen */
unsigned long eos; /* erase to end of screen */
unsigned long eol; /* erase to end of line */
unsigned long position; /* position cursor */
unsigned long window; /* window scroll */
unsigned long reserve1;
unsigned long reserve2;
};


extern char io0ac_objnam[SYS_MAXTYP] [SYS_PNMLEN + 1];
extern unsigned int io0ui_nextuid;


/* In-line object function definitions */

#define is_baduid(x) ((x) < 0 || (x) >= SYS_MAXOBJ) /* invalid uid */
#define is_srcsink(x) (uidtype(io0as_chantab[(x)].uid) == SRCSINK)