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FreeDOS/kernel/globals.h
Bart Oldeman f63eea565a Made the main fnodes far so they can be in UMBs. 
Internally the kernel uses two near fnodes though, to save on codesize
and fmemcpy's if necessary. Having memory management on two fnodes is
a little silly but I just want to make sure with the panic message
that we never accidentally try to use three near fnodes at the same time.
(two are used at the same time by rename, commit, and merge_file_changes).
This can be cleaned up later.

Anyway. 644736 bytes free conv memory isn't bad.


git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@821 6ac86273-5f31-0410-b378-82cca8765d1b
2004-03-23 22:45:38 +00:00

441 lines
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C
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/****************************************************************/
/* */
/* globals.h */
/* DOS-C */
/* */
/* Global data structures and declarations */
/* */
/* Copyright (c) 1995, 1996 */
/* Pasquale J. Villani */
/* All Rights Reserved */
/* */
/* This file is part of DOS-C. */
/* */
/* DOS-C is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public License */
/* as published by the Free Software Foundation; either version */
/* 2, or (at your option) any later version. */
/* */
/* DOS-C is distributed in the hope that it will be useful, but */
/* WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
/* the GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public */
/* License along with DOS-C; see the file COPYING. If not, */
/* write to the Free Software Foundation, 675 Mass Ave, */
/* Cambridge, MA 02139, USA. */
/****************************************************************/
#ifdef VERSION_STRINGS
#ifdef MAIN
static BYTE *Globals_hRcsId =
"$Id$";
#endif
#endif
#include "device.h"
#include "mcb.h"
#include "pcb.h"
#include "date.h"
#include "time.h"
#include "fat.h"
#include "fcb.h"
#include "tail.h"
#include "process.h"
#include "sft.h"
#include "cds.h"
#include "exe.h"
#include "fnode.h"
#include "dirmatch.h"
#include "file.h"
#include "clock.h"
#include "kbd.h"
#include "error.h"
#include "version.h"
#include "network.h"
#include "buffer.h"
#include "dcb.h"
#include "xstructs.h"
/* fatfs.c */
#ifdef WITHFAT32
VOID bpb_to_dpb(bpb FAR * bpbp, REG struct dpb FAR * dpbp, BOOL extended);
#else
VOID bpb_to_dpb(bpb FAR * bpbp, REG struct dpb FAR * dpbp);
#endif
#ifdef WITHFAT32
struct dpb FAR *GetDriveDPB(UBYTE drive, COUNT * rc);
#endif
extern struct dpb
FAR * ASM DPBp; /* First drive Parameter Block */
/* JPP: for testing/debuging disk IO */
/*#define DISPLAY_GETBLOCK */
/* */
/* Convience switch for maintaining variables in a single location */
/* */
#ifdef MAIN
#define GLOBAL
#else
#define GLOBAL extern
#endif
/* */
/* Convience definitions of TRUE and FALSE */
/* */
#ifndef TRUE
#define TRUE (1)
#endif
#ifndef FALSE
#define FALSE (0)
#endif
/* */
/* Constants and macros */
/* */
/* Defaults and limits - System wide */
#define NAMEMAX MAX_CDSPATH /* Maximum path for CDS */
/* internal error from failure or aborted operation */
#define ERROR -1
#define OK 0
/* internal transfer direction flags */
#define XFR_READ 1
#define XFR_WRITE 2
#define XFR_FORCE_WRITE 3
/* flag to update fcb_rndm field */
#define XFR_FCB_RANDOM 4
#define RDONLY 0
#define WRONLY 1
#define RDWR 2
/* special ascii code equates */
#define SPCL 0x00
#define CTL_C 0x03
#define CTL_F 0x06
#define BELL 0x07
#define BS 0x08
#define HT 0x09
#define LF 0x0a
#define CR 0x0d
#define CTL_P 0x10
#define CTL_Q 0x11
#define CTL_S 0x13
#define CTL_Z 0x1a
#define ESC 0x1b
#define CTL_BS 0x7f
#define INS 0x5200
#define DEL 0x5300
#define F1 0x3b00
#define F2 0x3c00
#define F3 0x3d00
#define F4 0x3e00
#define F5 0x3f00
#define F6 0x4000
#define LEFT 0x4b00
#define RIGHT 0x4d00
/* Blockio constants */
#define DSKWRITE 1 /* dskxfr function parameters */
#define DSKREAD 2
#define DSKWRITEINT26 3
#define DSKREADINT25 4
/* NLS character table type */
typedef BYTE *UPMAP;
/* */
/* External Assembly variables */
/* */
extern struct dhdr
FAR ASM clk_dev, /* Clock device driver */
FAR ASM con_dev, /* Console device driver */
FAR ASM prn_dev, /* Generic printer device driver */
FAR ASM aux_dev, /* Generic aux device driver */
FAR ASM blk_dev; /* Block device (Disk) driver */
extern COUNT *error_tos, /* error stack */
disk_api_tos, /* API handler stack - disk fns */
char_api_tos; /* API handler stack - char fns */
extern BYTE FAR _InitTextStart; /* first available byte of ram */
extern BYTE FAR _HMATextAvailable, /* first byte of available CODE area */
FAR _HMATextStart[], /* first byte of HMAable CODE area */
FAR _HMATextEnd[]; /* and the last byte of it */
extern
BYTE DosLoadedInHMA; /* if InitHMA has moved DOS up */
extern struct ClockRecord
ASM ClkRecord;
/* */
/* Global variables */
/* */
extern BYTE ASM os_setver_major,/* editable major version number */
ASM os_setver_minor, /* editable minor version number */
ASM os_major, /* major version number */
ASM os_minor, /* minor version number */
ASM rev_number, /* minor version number */
ASM version_flags; /* minor version number */
#ifdef DEBUG
GLOBAL WORD bDumpRegs
#ifdef MAIN
= FALSE;
#else
;
#endif
GLOBAL WORD bDumpRdWrParms
#ifdef MAIN
= FALSE;
#else
;
#endif
#endif
#if 0 /* defined in MAIN.C now to save low memory */
GLOBAL BYTE copyright[] =
"(C) Copyright 1995-2001 Pasquale J. Villani and The FreeDOS Project.\n"
"All Rights Reserved. This is free software and comes with ABSOLUTELY NO\n"
"WARRANTY; you can redistribute it and/or modify it under the terms of the\n"
"GNU General Public License as published by the Free Software Foundation;\n"
"either version 2, or (at your option) any later version.\n";
#endif
GLOBAL const BYTE ASM os_release[]
#ifdef MAIN
#if 0
= "DOS-C version %d.%d Beta %d [FreeDOS Release] (Build %d).\n"
#endif
= "FreeDOS kernel version " KERNEL_VERSION_STRING
" (Build " KERNEL_BUILD_STRING ") [" __DATE__ " " __TIME__ "]\n"
#if 0
"For technical information and description of the DOS-C operating system\n\
consult \"FreeDOS Kernel\" by Pat Villani, published by Miller\n\
Freeman Publishing, Lawrence KS, USA (ISBN 0-87930-436-7).\n\
\n"
#endif
#endif
;
/* Globally referenced variables - WARNING: ORDER IS DEFINED IN */
/* KERNAL.ASM AND MUST NOT BE CHANGED. DO NOT CHANGE ORDER BECAUSE THEY */
/* ARE DOCUMENTED AS UNDOCUMENTED (?) AND HAVE MANY PROGRAMS AND TSR'S */
/* ACCESSING THEM */
extern UWORD ASM NetBios;
extern BYTE * ASM net_name;
extern BYTE ASM net_set_count;
extern BYTE ASM NetDelay, ASM NetRetry;
extern UWORD ASM first_mcb, /* Start of user memory */
ASM uppermem_root; /* Start of umb chain (usually 9fff) */
extern char * ASM inputptr; /* pointer to unread CON input */
extern sfttbl FAR * ASM sfthead; /* System File Table head */
extern struct dhdr
FAR * ASM clock, /* CLOCK$ device */
FAR * ASM syscon; /* console device */
extern WORD ASM maxbksize; /* Number of Drives in system */
extern struct buffer
FAR *ASM firstbuf; /* head of buffers linked list */
enum {LOC_CONV=0, LOC_HMA=1};
extern unsigned char ASM bufloc; /* 0=conv, 1=HMA */
extern void far * ASM deblock_buf; /* pointer to workspace buffer */
GLOBAL char FAR *firstAvailableBuf;
extern struct cds FAR * ASM CDSp; /* Current Directory Structure */
extern
struct cds FAR * ASM current_ldt;
extern LONG ASM current_filepos; /* current file position */
extern sfttbl FAR * ASM FCBp; /* FCB table pointer */
extern WORD ASM nprotfcb; /* number of protected fcbs */
extern UBYTE ASM nblkdev, /* number of block devices */
ASM lastdrive, /* value of last drive */
ASM uppermem_link, /* UMB Link flag */
ASM PrinterEcho; /* Printer Echo Flag */
extern UWORD ASM LoL_nbuffers; /* Number of buffers */
extern struct dhdr
ASM nul_dev;
extern UBYTE ASM mem_access_mode; /* memory allocation scheme */
extern BYTE ASM ErrorMode, /* Critical error flag */
ASM InDOS, /* In DOS critical section */
ASM OpenMode, /* File Open Attributes */
ASM SAttr, /* Attrib Mask for Dir Search */
ASM dosidle_flag, ASM Server_Call, ASM CritErrLocus, ASM CritErrAction,
ASM CritErrClass, ASM VgaSet,
ASM njoined; /* number of joined devices */
extern UWORD ASM Int21AX;
extern COUNT ASM CritErrCode;
extern BYTE FAR * ASM CritErrDev;
extern struct dirent
ASM SearchDir;
extern struct {
COUNT nDrive;
BYTE szName[FNAME_SIZE + 1];
BYTE szExt[FEXT_SIZE + 1];
} ASM FcbSearchBuffer;
extern struct /* Path name parsing buffer */
{
BYTE _PriPathName[128];
} ASM _PriPathBuffer;
#define PriPathName _PriPathBuffer._PriPathName
extern struct /* Alternate path name parsing buffer */
{
BYTE _SecPathName[128];
} ASM _SecPathBuffer;
#define SecPathName _SecPathBuffer._SecPathName
extern UWORD ASM wAttr;
extern BYTE ASM default_drive; /* default drive for dos */
extern dmatch ASM sda_tmp_dm; /* Temporary directory match buffer */
extern BYTE
ASM internal_data[], /* sda areas */
ASM swap_always[], /* " " */
ASM swap_indos[], /* " " */
ASM tsr, /* true if program is TSR */
ASM break_flg, /* true if break was detected */
ASM break_ena; /* break enabled flag */
extern void FAR * ASM dta; /* Disk transfer area (kludge) */
extern seg ASM cu_psp; /* current psp segment */
extern iregs FAR * ASM user_r; /* User registers for int 21h call */
extern struct dirent /* Temporary directory entry */
ASM DirEntBuffer;
extern fcb FAR * ASM sda_lpFcb; /* Pointer to users fcb */
extern sft FAR * ASM lpCurSft;
extern BYTE ASM verify_ena, /* verify enabled flag */
ASM switchar; /* switch char */
extern UWORD ASM return_code; /* Process termination rets */
extern UBYTE ASM BootDrive, /* Drive we came up from */
ASM scr_pos; /* screen position for bs, ht, etc */
/*extern WORD
NumFloppies; !!*//* How many floppies we have */
extern keyboard ASM kb_buf;
extern char ASM local_buffer[LINEBUFSIZE0A];
extern struct cds
ASM TempCDS;
/* start of uncontrolled variables */
#ifdef DEBUG
GLOBAL iregs error_regs; /* registers for dump */
GLOBAL WORD dump_regs; /* dump registers of bad call */
#endif
extern struct f_node FAR * ASM f_nodes; /* pointer to the array */
extern UWORD ASM f_nodes_cnt; /* number of allocated f_nodes */
/* */
/* Function prototypes - automatically generated */
/* */
#include "proto.h"
/* Process related functions - not under automatic generation. */
/* Typically, these are in ".asm" files. */
VOID ASMCFUNC FAR cpm_entry(VOID)
/*INRPT FAR handle_break(VOID) */ ;
VOID enable(VOID), disable(VOID);
COUNT ASMCFUNC
CriticalError(COUNT nFlag, COUNT nDrive, COUNT nError,
struct dhdr FAR * lpDevice);
#ifdef PROTO
VOID ASMCFUNC FAR CharMapSrvc(VOID);
VOID ASMCFUNC FAR set_stack(VOID);
VOID ASMCFUNC FAR restore_stack(VOID);
/*VOID INRPT FAR handle_break(VOID); */
BOOL ASMCFUNC ReadATClock(BYTE *, BYTE *, BYTE *, BYTE *);
ULONG ASMCFUNC ReadPCClock(VOID);
VOID ASMCFUNC WriteATClock(BYTE *, BYTE, BYTE, BYTE);
VOID ASMCFUNC WritePCClock(ULONG);
BYTE FAR * ASMCFUNC device_end(VOID);
COUNT ASMCFUNC kb_data(VOID);
COUNT ASMCFUNC kb_input(VOID);
COUNT ASMCFUNC kb_init(VOID);
VOID ASMCFUNC setvec(UWORD, intvec);
intvec ASMCFUNC getvec(UWORD);
COUNT con(COUNT);
#else
VOID FAR CharMapSrvc();
VOID FAR set_stack();
VOID FAR restore_stack();
WORD execrh();
VOID exit();
/*VOID INRPT FAR handle_break(); */
BYTE FAR *device_end();
COUNT kb_data();
COUNT kb_input();
COUNT kb_init();
VOID setvec();
intvec getvec();
COUNT con();
#endif
/* */
/* special word packing prototypes */
/* */
#ifdef NATIVE
#define getlong(vp) (*(UDWORD *)(vp))
#define getword(vp) (*(UWORD *)(vp))
#define getbyte(vp) (*(UBYTE *)(vp))
#define fgetlong(vp) (*(UDWORD FAR *)(vp))
#define fgetword(vp) (*(UWORD FAR *)(vp))
#define fgetbyte(vp) (*(UBYTE FAR *)(vp))
#define fputlong(vp, l) (*(UDWORD FAR *)(vp)=l)
#define fputword(vp, w) (*(UWORD FAR *)(vp)=w)
#define fputbyte(vp, b) (*(UBYTE FAR *)(vp)=b)
#else
UDWORD getlong(VOID *);
UWORD getword(VOID *);
UBYTE getbyte(VOID *);
UDWORD fgetlong(VOID FAR *);
UWORD fgetword(VOID FAR *);
UBYTE fgetbyte(VOID FAR *);
VOID fputlong(VOID FAR *, UDWORD);
VOID fputword(VOID FAR *, UWORD);
VOID fputbyte(VOID FAR *, UBYTE);
#endif
#ifdef I86
#define setvec(n, isr) (void)(*(intvec FAR *)MK_FP(0,4 * (n)) = (isr))
#endif
/*#define is_leap_year(y) ((y) & 3 ? 0 : (y) % 100 ? 1 : (y) % 400 ? 0 : 1) */
/* ^Break handling */
#ifdef __WATCOMC__
#pragma aux (cdecl) spawn_int23 aborts;
#endif
void ASMCFUNC spawn_int23(void); /* procsupt.asm */
GLOBAL BYTE ReturnAnyDosVersionExpected;
GLOBAL struct f_node fnode[2];
GLOBAL int fnode_fd[2];
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