The C Users' Group Library 1994 August

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Text File | 1990-10-12 | 16KB | 908 lines

; ; --- Version 2.2 90-10-12 10:46 --- ; ; CTask - Definitions for assembler routines ; ; Public Domain Software written by ; Thomas Wagner ; Ferrari electronic Gmbh ; Beusselstrasse 27 ; D-1000 Berlin 21 ; Germany ; ; The configuration definitions were moved to the combined ; C/Assembler include file "tskconf.h" in version 2.1. ; include tskconf.h ; ;------------------------------------------------------------------- ; TIMEOUT = -1 WAKE = -2 WATCH = -3 ; ; Task states ; ST_KILLED = 0 ST_STOPPED = 1 ST_DELAYED = 2 ST_WAITING = 3 ST_ELIGIBLE = 4 ST_RUNNING = 5 ; ; Task flags ; F_TEMP = 80h ; Task is temporary F_STTEMP = 40h ; Task stack is temporary, free on kill F_PERM = 20h ; Task is a permanent system task F_USES_NDP = 02h ; Task uses NDP F_CRIT = 01h ; Task is critical, may not be preempted ; FL_SYSM = 0f0h ; Mask for system flags FL_USRM = 00fh ; Mask for user flags ; ; Timer queue element action kinds (upper nibble of elkind) ; TELEM_TIMER = 10h ; Timeout element TELEM_MEM = 20h ; Memory watch element TELEM_PORT = 30h ; Port watch element TELEM_HOTKEY = 40h ; Hotkey element ; ; Timer watch element comparison kinds (lower nibble of elkind) ; TCMP_EQ = 1 ; Equal TCMP_NE = 2 ; Not Equal TCMP_GE = 3 ; Greater or Equal (unsigned) TCMP_LE = 4 ; Less or Equal (unsigned) TCMP_GES = 5 ; Greater or Equal (signed) TCMP_LES = 6 ; Less or Equal (signed) TCMP_CHG = 7 ; Change in value ; ; Timer queue element control structure pointer kinds ; TKIND_TASK = 1 ; tcbptr, Wakeup associated task TKIND_WAKE = 2 ; tcbptr, but not same task TKIND_PROC = 3 ; call function TKIND_FLAG = 4 ; flagptr, set flag TKIND_COUNTER = 5 ; counterptr, increment counter TKIND_COUNTDEC = 6 ; counterptr, decrement counter ; ; Timer queue element flags ; TFLAG_BUSY = 01h ; Timer task is busy processing element TFLAG_ENQUEUE = 02h ; Enqueue after processing TFLAG_UNQUEUE = 04h ; Don't enqueue after processing TFLAG_REMOVE = 08h ; Free element after processing TFLAG_REPEAT = 40h ; Bit set signals repeat processing TFLAG_TEMP = 80h ; Bit set means temporary element ; ; Name link and queue head structure types ; Q_HEAD = 80h ; Queue head flag ; TYP_GROUP = 0 TYP_TCB = 1 TYP_FLAG = 2 TYP_RESOURCE = 3 TYP_COUNTER = 4 TYP_MAILBOX = 5 TYP_PIPE = 6 TYP_WPIPE = 7 TYP_BUFFER = 8 TYP_TIMER = 9 TYP_WATCH = 10 TYP_HOTKEY = 11 ; NAMELENGTH = 9 ; ; Installation flags ; IFL_VIDEO = 0001h ; Install INT 10 access resource IFL_DISK = 0002h ; Install INT 13 access resource IFL_INT8_DIR = 0004h ; Call original INT 8 directly IFL_PRINTER = 0008h ; Install INT 17 handler IFL_INT15 = 0010h ; Install IBM-AT INT 15 handler IFL_NODOSVARS = 0020h ; Don't swap DOS variables IFL_NOEXITCHECK = 0040h ; Don't check for premature exit ; IFL_STD = (IFL_DISK OR IFL_PRINTER OR IFL_INT15) ; ; Size of the DOS variable swap area plus 8 bytes. ; DOSSWAPSIZE = 30h ; ndp_rec struc control87 dw ? status87 dw ? tag87 dw ? iplo87 dw ? iphi87_opcode87 dw ? opaddrlo87 dw ? opaddrhi87_null dw ? ndp_st0 dt ? ndp_st1 dt ? ndp_st2 dt ? ndp_st3 dt ? ndp_st4 dt ? ndp_st5 dt ? ndp_st6 dt ? ndp_st7 dt ? ndp_rec ends ; callchain struc cc_next dd ? cc_func dd ? cc_user_ptr dd ? cc_flags db ? callchain ends ; qelem_pri struc q_prior dw ? q_ini_prior dw ? qelem_pri ends ; qelem_ticks struc q_ticks dd ? qelem_ticks ends ; queue_rec struc q_next dd ? q_prev dd ? q_kind db ? q_el db TYPE qelem_pri dup(?) queue_rec ends ; queue_head struc q_first dd ? q_last dd ? db ? queue_head ends ; ; namerec struc ; nlist db TYPE queue_head dup(?) nstrucp dd ? nname db NAMELENGTH dup(?) ; namerec ends ; ; tlink_rec struc ; tlink db TYPE queue_rec dup(?) tlnext dd ? ; timer task temp chain strucp dd ? ; structure pointer tuserp dd ? ; user parameter IF GROUPS tchain db TYPE queue_head dup(?) ; timer element chain ENDIF telem db 8 dup(?) ; timeout element (union) elkind db ? ; element kind struckind db ? ; structure kind tflags db ? ; timer flags ; tlink_rec ends ; ; tcb struc ; cqueue db TYPE queue_rec dup(?) qhead dd ? stkbot dd ? ; stack bottom state db ? ; task state flags db ? ; task flags ; t_sp dw ? t_ss dw ? t_ax dw ? t_cx dw ? t_dx dw ? t_si dw ? t_di dw ? t_bp dw ? t_es dw ? t_ds dw ? ; timerq db TYPE tlink_rec dup(?) retptr dd ? ; return value pointer retsize dw ? ; return value size ; save_func dd ? rest_func dd ? user_ptr dd ? ; IF GROUPS tgroup dd ? ; group control block pointer homegroup dd ? ; group control block pointer ENDIF IF DOS sched_ent_func dd ? t_indos db ? ; in-dos flags t_new db ? ; new task flag ; ; caution: don't change the order of the following 3 items! base_psp dw ? ; base PSP segment address psp_sssp dd ? ; PSP ss:sp save area t_swap_area db DOSSWAPSIZE dup(?) ; save area for DOS-vars & Int23/24 ENDIF ; IF TSK_NAMED tname db TYPE namerec dup(?) ENDIF IF EMS t_ems_map db EMS_SAVE_SIZE dup(?) ENDIF IF NDP ndpsave db TYPE ndp_rec dup(?) ENDIF ; tcb ends ; ; gcb struc ; ghome dd ? glevel dd ? gbranch dd ? gcreator dd ? grp_exit_addr dd ? gcreate_psp dw ? gsave_psp dw ? gsave_sssp dd ? gnamelist db TYPE namerec dup(?) gmain_ptr dd ? gremove dd ? IF GROUPS gtelem_list db TYPE queue_head dup(?) gticker_list db TYPE queue_head dup(?) ENDIF ; IF TSK_DYNAMIC gpalloc dd ? gpfree dd ? ENDIF gcb ends ; ; flag struc ; fwait_set db TYPE queue_head dup(?) fwait_clear db TYPE queue_head dup(?) fstate dw ? IF TSK_DYNAMIC flflags db ? ENDIF IF TSK_NAMED fname db TYPE namerec dup(?) ENDIF ; flag ends ; ; counter struc ; cwait_set db TYPE queue_head dup(?) cwait_clear db TYPE queue_head dup(?) cstate dd ? ; IF TSK_DYNAMIC ctflags db ? ENDIF IF TSK_NAMED ctname db TYPE namerec dup(?) ENDIF counter ends ; ; resource struc ; rwaiting db TYPE queue_head dup(?) rowner dd ? rcount dw ? ; IF TSK_DYNAMIC rsflags db ? ENDIF IF TSK_NAMED rsname db TYPE namerec dup(?) ENDIF resource ends ; ; mailbox struc ; mwaiting db TYPE queue_head dup(?) mail_first dd ? mail_last dd ? ; IF TSK_DYNAMIC mbflags db ? ENDIF IF TSK_NAMED mbname db TYPE namerec dup(?) ENDIF mailbox ends ; ; pipe struc ; pwait_read db TYPE queue_head dup(?) pwait_write db TYPE queue_head dup(?) pwait_clear db TYPE queue_head dup(?) pbufsize dw ? pfilled dw ? pinptr dw ? poutptr dw ? pcontents dd ? ; IF TSK_DYNAMIC ppflags db ? ENDIF IF TSK_NAMED ppname db TYPE namerec dup(?) ENDIF pipe ends ; ; wpipe struc ; wwait_read db TYPE queue_head dup(?) wwait_write db TYPE queue_head dup(?) wwait_clear db TYPE queue_head dup(?) wbufsize dw ? wfilled dw ? winptr dw ? woutptr dw ? wcontents dd ? ; IF TSK_DYNAMIC wpflags db ? ENDIF IF TSK_NAMED wpname db TYPE namerec dup(?) ENDIF wpipe ends ; ; glob_rec struc ; glb_id db 8 dup(?) current_task dd ? eligible_queue db TYPE queue_head dup(?) timer_queue db TYPE queue_head dup(?) watch_queue db TYPE queue_head dup(?) preempt db ? pretick db ? var_prior db ? in_sched db ? tick_factor dw ? ticks_per_sec dw ? ticker_chain dd ? ; stub_table dd ? ; IF TSK_DYNAMIC pkill_queue db TYPE queue_head dup(?) pkill_task dd ? ENDIF IF IBM hotkey_scan db TYPE queue_head dup(?) hotkey_noscan db TYPE queue_head dup(?) ENDIF IF EMS ems_save dd ? ems_rest dd ? ems_savetsk dd ? ENDIF IF DOS emergency_exit dd ? l_swap dw ? dos_vars dd ? dos_in_use dd ? ; Adress of DOS in-use-flag ENDIF IF GROUPS ggroup db TYPE gcb dup(?) ELSE main_ptr dd ? glb_remove dd ? IF TSK_NAMED name_list db TYPE namerec dup(?) ENDIF ENDIF IF NDP ndp_present db ? ENDIF ; glob_rec ends ; ; tick_rec struc ; ticknext dd ? ticklo dw ? tickhi dw ? IF TSK_DYNAMIC tickflags db ? ENDIF ; tick_rec ends ; ; hotflags_rec struc hf_mask db ? hf_value db ? hotflags_rec ends ; hotkey_rec struc kbflags1 db TYPE hotflags_rec dup(?) kbflags2 db TYPE hotflags_rec dup(?) kbflags3 db TYPE hotflags_rec dup(?) scancode db ? hotkey_rec ends ; ; ; Stack setup relative to BP after switch_stack has been called ; saved_regs struc ; dd ? ; special return addr entry_flags dw ? ; flags on entry to switch_stack caller_ip dw ? ; IP from INT stack caller_cs dw ? ; CS from INT stack caller_flags dw ? ; flags from INT stack save_es dw ? save_ds dw ? save_bp dw ? save_di dw ? save_si dw ? save_dx dw ? save_ax dw ? slot_sp dw ? ; stack slot sp slot_idx dw ? ; stack slot index save_cx dw ? save_bx dw ? ; saved_regs ends ; ; stc_saved macro or byte ptr caller_flags[bp],1 endm ; clc_saved macro and byte ptr caller_flags[bp],0feh endm ; ; Flags for the T_INDOS field in the TCB ; OWN_LOWER = 1 OWN_UPPER = 2 DOS_ENTERED = 4 ; ;--------------------------------------------------------------------- ; global_ext macro IF SINGLE_DATA extrn tsk_glob_rec: byte ELSE extrn tsk_global: dword ENDIF endm ; IFDEF TC_HUGE ; .tsk_data macro CTASK_DATA segment byte public 'DATA' assume ds:CTASK_DATA,es:CTASK_DATA @CTASK_DATA equ <CTASK_DATA> @data equ <CTASK_DATA> endm ; ELSE ; .tsk_data macro .data @CTASK_DATA equ <DGROUP> assume ds:@data,es:@data endm ; ENDIF ; IF NEAR_CODE ; .tsk_code macro .code endm ; Globext macro lab IF CALL_PASCAL extrn pascal lab: near ELSE extrn C lab: near ENDIF endm ; CGlbext macro lab extrn C lab: near endm ; ELSE ; .tsk_code macro CTASK_TEXT segment word public 'CODE' @code equ <CTASK_TEXT> assume cs:CTASK_TEXT endm ; Globext macro lab IF CALL_PASCAL extrn pascal lab: far ELSE extrn C lab: far ENDIF endm ; CGlbext macro lab extrn C lab: far endm ; ENDIF ; IF LOCALS_FAR ; Locext macro lab IF CALL_PASCAL extrn pascal lab: far ELSE extrn C lab: far ENDIF endm ; CLocext macro lab extrn C lab: far endm ; ELSE ; Locext macro lab IF CALL_PASCAL extrn pascal lab: near ELSE extrn C lab: near ENDIF endm ; CLocext macro lab extrn C lab: near endm ; ENDIF ; .tsk_ecode macro IFDEF @CurSeg @CurSeg ends ELSE @curseg ends ENDIF endm ; .tsk_edata macro IFDEF @CurSeg @CurSeg ends ELSE @curseg ends ENDIF endm ; .tsk_model macro .model small,c endm ; Globalfunc macro name,pars IF NEAR_CODE IF CALL_PASCAL name proc near pascal pars ELSE name proc near C pars ENDIF ELSE IF CALL_PASCAL name proc far pascal pars ELSE name proc far C pars ENDIF ENDIF endm ; CGlobalfunc macro name,pars IF NEAR_CODE name proc near C pars ELSE name proc far C pars ENDIF endm ; Localfunc macro name,pars IF LOCALS_FAR IF CALL_PASCAL name proc far pascal pars ELSE name proc far C pars ENDIF ELSE IF CALL_PASCAL name proc near pascal pars ELSE name proc near C pars ENDIF ENDIF endm ; CLocalfunc macro name,pars IF LOCALS_FAR name proc far C pars ELSE name proc near C pars ENDIF endm ; Pubfunc macro name IF CALL_PASCAL public pascal name ELSE public C name ENDIF endm ; CPubfnc macro name public C name endm ; ;------------------------------------------------------------------- ; ; The following is a set of macros that allow calling an ; external routine without caring about the calling sequence ; (C or Pascal) in use. Usage is ; ; callp procname,<parameter list> ; as in ; callp request_resource,<<ds,offset dosupper>,0,0> ; ; Doubleword and Segment/Offset pairs must be grouped with an ; additional level of brackets. ; ; The parameter list may contain the special character '#' ; as a prefix to a label to identify an offset, so the above ; example could be abbreviated to ; ; callp request_resource,<<ds,#dosupper>,0,0> ; ; Also, the prefix '/' denotes an effective address, i.e. the ; LEA instruction is used to load the parameter value. ; ; ; The 'vpush' macro pushes a single value or a doubleword pair. ; It checks the type of parameter (constant or variable), and ; handles the offset shortcut '#'. Note that AX is destroyed ; when constants are pushed and the CPU is an 8086/88. ; vpush macro val,val2 local vrest,hash,slash cc_parcnt = cc_parcnt + 2 hash instr 1,<val>,<#> slash instr 1,<val>,</> IF hash EQ 1 ;; If hashmark prefix vrest substr <val>,2 ;; Get real parameter IF @Cpu AND 2 push offset vrest ELSE mov ax,offset vrest push ax ax_is_zero = 0 ENDIF ELSEIF slash EQ 1 vrest substr <val>,2 ;; Get real parameter lea ax,vrest push ax ax_is_zero = 0 ELSEIF (.TYPE val) AND 4 ;; If it's a constant IF @Cpu AND 2 push val ELSE IF val mov ax,val ax_is_zero = 0 ELSEIFE ax_is_zero ;; Push 0 is handled special xor ax,ax ax_is_zero = TRUE ENDIF push ax ENDIF ELSEIF (.TYPE val) AND 10h ;; If it's a register push val ;; Push normal if register ELSE push word ptr (val) ;; Push word if variable ENDIF IFNB <val2> vpush val2 ;; Do it again if second parameter ENDIF endm ; ; The 'pushp' macro reverses the parameter list for the C calling ; sequence by calling itself recursively. ; pushp macro p1,p2,p3,p4,p5,p6,p7,p8,p9,p10 IFNB <p2> pushp <p2>,<p3>,<p4>,<p5>,<p6>,<p7>,<p8>,<p9>,<p10> ENDIF IFNB <p1> vpush p1 ENDIF endm ; ; The 'callp' macro calls pushp or vpush depending on the ; calling sequence, and re-adjusts the stack after the call ; for C. ; callp macro name,pars cc_parcnt = 0 ax_is_zero = FALSE IF CALL_PASCAL IRP p,<pars> vpush p ENDM ELSE pushp pars ENDIF call name IF NOT CALL_PASCAL AND cc_parcnt add sp,cc_parcnt ENDIF ENDM ; ;-------------------------------------------------------------------------- ; ; Checking mode support macros ; CHECK_PTR_R macro sreg,reg,txt local ok,nok,str IF CHECKING push ax mov ax,sreg or ax,reg jnz ok jmp short nok str db txt,' - Invalid pointer: %FP',0ah,0 nok: callp tsk_fatal_pmd,<<cs,#str>,<sreg,reg>> ok: pop ax ENDIF ENDM ; ; CHECK_PTR macro pntr,txt local ok,nok,str IF CHECKING push ax mov ax,word ptr (pntr) or ax,word ptr (pntr+2) jnz ok jmp short nok str db txt,' - Invalid pointer: %FP',0ah,0 nok: callp tsk_fatal_pmd,<<cs,#str>,<pntr+2,pntr>> ok: pop ax ENDIF ENDM ; ; CHECK_TCBPTR_R macro sreg,reg,txt local ok,nok,str IF CHECKING push ax mov ax,sreg or ax,reg jz nok cmp sreg:cqueue.q_kind[reg],TYP_TCB jne nok IF TSK_NAMED cmp sreg:tname.nlist.q_kind[reg],TYP_TCB je ok ENDIF jmp short nok str db txt,' - Invalid pointer: %FP',0ah,0 nok: callp tsk_fatal_pmd,<<cs,#str>,<sreg,reg>> ok: pop ax ENDIF ENDM ; ; CHECK_TCBPTR macro pntr,txt IF CHECKING push ds push si lds si,pntr CHECK_TCBPTR_R ds,si,txt pop si pop ds ENDIF ENDM ; ; CHECK_EVTPTR_R macro sreg,reg,kind,txt local ok,nok,str IF CHECKING push ax mov ax,sreg or ax,reg jz nok mov al,kind or al,Q_HEAD cmp al,sreg:cqueue.q_kind[reg] je ok jmp short nok str db txt,' - Invalid pointer: %FP',0ah,0 nok: callp tsk_fatal_pmd,<<cs,#str>,<sreg,reg>> ok: pop ax ENDIF ENDM ; ; CHECK_EVTPTR macro pntr,kind,txt IF CHECKING push ds push si lds si,pntr CHECK_EVTPTR_R ds,si,kind,txt pop si pop ds ENDIF ENDM ; ; CHECK_QHEAD_R macro sreg,reg,txt local ok,nok,str IF CHECKING push ax mov ax,sreg or ax,reg jz nok test sreg:cqueue.q_kind[reg],Q_HEAD jnz ok jmp short nok str db txt,' - Invalid pointer: %FP',0ah,0 nok: callp tsk_fatal_pmd,<<cs,#str>,<sreg,reg>> ok: pop ax ENDIF ENDM ; ; CHECK_QHEAD macro pntr,txt IF CHECKING push ds push si lds si,pntr CHECK_QHEAD_R ds,si,txt pop si pop ds ENDIF ENDM ;