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526 lines
18 KiB
Plaintext
526 lines
18 KiB
Plaintext
;
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; File: Thing Dispatch.a
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;
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; Contains: Dispatcher and Entry point table for Thing Manager
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;
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; Written by: andy warhol and friends
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;
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; Copyright: © 1990-1991, 1993 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <SM5> 8/5/93 JDR integrate Component Mgr from Reality
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; <SM4> 7/21/93 RC House Cleaning from Reality
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; <9> 7/16/93 JDR Added records and cleaned up some code. No real changes were
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; made. Just tried making it more readable.
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; <3> 7/2/93 IH Reality Update: Change GestaltComponentMgr comments to correct gestalt
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; prototype parameters (long *). Since this is assembly it doesn't
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; really matter, but I need to change the prototype and I might as
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; well fix the comment in the code too. How come the same code is
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; in ThingManagerDisp.a and ThingManagerDispatcher.a?
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; <SM2> 6/24/93 CSS Fix dispatcher to work with ROM. And rollin from
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; Reality.
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; <8> 6/13/93 JDR Rolled in the ComponentMgr sources from QuickTime 1.6.
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; <7> 12/12/91 DTY Get rid of the spaces in the file names
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; <6> 10/31/91 YK Moved patches to ComponentPatch.a.
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; <5> 10/30/91 YK Added ComponentSearch call. Check extensionsEnabledBit before
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; calling ComponentSearch.
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; <4> 10/29/91 YK Proc MainComponent, CallThingFunction, ChainThingFunction, and
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; DelegateComponentCall are combined into one proc so that we can
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; (almost) forget about LinkPatch.
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; <3> 10/25/91 JH I had accidentally left a dcImport macro at the top of
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; ChainThingFunction. This added a dc.w which was being jumped
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; to. Fixed by changing to plain old IMPORT.
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; <2> 10/24/91 JH Cleaning up after a hurried checkin. Removed the double jump
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; table (see whine below) and did it with the dcImportResident
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; macro, which I guess is better. Also removed a lot of stuff
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; which had been commented out.
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; <24> 10/22/91 JH Started rolling into the system file, made MainCompent a PatchProc
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; Added includes. Added completely stupid double jump table to keep Link Patch happy
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; changed a bunch of elegant branches to clunky tst and branch to a label where you can jump,
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; again for link patch.
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; <23> 10/17/91 JB If not debug build, pop stack and return for future calls
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; <22> 10/15/91 MD move thing manager gestalt function into here
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; <21> 10/14/91 BAL save registers around call to cleanup app components during
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; patches to rsrczoneinit.
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; <20> 10/11/91 BAL added stub for RsrcZoneInit patch.
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; <19> 10/3/91 JB Push storage when doing that chain thing
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; <18> 10/1/91 BAL Make delegate work with new style dispatcers
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; <17> 10/1/91 BAL Added support for new chain thing call.
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; <16> 9/29/91 KIP Added wily dispatcher option of the future.
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; <15> 9/26/91 BAL backed out that nasty stuff of mine that jim and peter checked
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; in while I was sleeping.
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; <14> 9/26/91 BAL jim & peter checking in bruce's changes - 2:00 AM...
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; <13> 9/18/91 BAL fix up the dispatch table macro to deal with empty entries
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; <12> 7/24/91 BAL Add support for optional fast thing function dispatchers.
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; <11> 5/18/91 dvb Thing->Component
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; <10> 5/2/91 BAL Conditionalized debug breaks
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; <9> 4/25/91 PH fix "optimized" calling of a5 things
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; <8> 4/24/91 BAL optimized thing dispatcher
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; <7> 4/18/91 BAL Removed support for when and self parameters.
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; <6> 4/14/91 BAL Replaced the debuggers with debugstr's.
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; <5> 3/28/91 BAL Added ChainThingCall.
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; <4> 2/16/91 BAL Added patch to intercept the PMgrExit trap and destroy any
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; things or thingInstances found in the departing heap. Also
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; implemented CallThingNow for dispatching to things with an
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; implicit when parameter.
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; <3> 2/9/91 BAL only switch A5 if switching to a non-zero value.
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; <2> 2/6/91 PH Removed debugger from bad thing instance path.
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;
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; To Do:
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;
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PRINT PUSH,OFF
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LOAD 'StandardEqu.d'
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INCLUDE 'Components.a'
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INCLUDE 'LinkedPatchMacros.a'
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PRINT POP
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WARHOL_DEBUG equ 0
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ComponentManagerLowMem equ $28a
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RegisteredComponent record 0
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rtRoutine ds.l 1
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rtDesc ds ComponentDescription
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;long rtRefcon overlaps previous struct
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rtParent ds.l 1
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rtNameHand ds.l 1
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rtInfoHand ds.l 1
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rtIconHand ds.l 1
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rtFlags ds.b 1
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rtEntryUseCount ds.b 1
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rtReferenceCount ds.w 1
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rtFileNumber ds.w 1
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rtResourceID ds.w 1
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rtResourceType ds.l 1
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rtLocalA5 ds.l 1
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rtNext ds.l 1
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rtRoutineHandle ds.l 1 ; don't trust RecoverHandle
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rtConnectionID ds.l 1
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endr
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RegisteredComponentInstance record 0
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rtiEntry ds.l 1
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rtiFlags ds.b 1
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rtiEntryUseCount ds.b 1
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rtiError ds.w 1
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rtiStorage ds.l 1
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;rtiQueuedCalls ds.l 1
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rtiSwitchedA5 ds.l 1
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endr
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ComponentManagerGlobals record 0
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rtInstanceTable ds.l 1
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rtModSeed ds.l 1
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rtReservedForCodecManager ds.l 1
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rtInstanceTableUsedCount ds.w 1
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rtInstanceTableTotalCount ds.w 1
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rtFileUsedCount ds.w 1
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rtFileTotalCount ds.w 1
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rtTableEntryCount ds.w 1
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hasMoveHLo ds.b 1
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rtReserved ds.b 1
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rtTable ds.l 1
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rtUsedChain ds.l 1
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rtFreeChain ds.l 1
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rtFileTable ds.l 1
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endr
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MainComponent PROC EXPORT
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IMPORT ComponentDispTableHead
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EXPORT ComponentBummer
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with RegisteredComponent,RegisteredComponentInstance,ComponentManagerGlobals
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;-------------------------------------------------------
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;
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; pascal long DoSomething( long theComponent, long Params, long What );
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;
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; Stack: ON ENTRY BEFORE THING AFTER THING ON EXIT
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;
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; result [saveA5¥] [saveA5] result¥
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; theComponent return addr¥ return addr return addr
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; params params params
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; params params params
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; what what what
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; top -> return addr new result¥ result¥
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; &what¥
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; PrivateStorage¥
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; new return addr¥
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;-------------------------------------------------------
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; A7 OFFSETS OF PARAMETERS
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;
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caller EQU 0 ; return address of caller
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selector EQU caller+4 ; size of params,thing routine number
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cmptparams EQU selector+4 ; arbitrary number of parameters
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tst.l d0 ; Is it a CallComponent() request?
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bne Dispatch ; no, go do the normal dispatch
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CallWithoutWhen
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move.b selector+1(sp),d0 ; pick up size of parameters (low byte of top word of selector)
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lea cmptparams(sp,d0.w),a0 ; point past parameters to theComponent
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move.l (a0),d1 ; get the thingID
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ChainShare
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move.w d1,d0 ; make into a long before indexing
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lsl.l #4,d0 ; multiply index by sizeof(RegisteredComponentInstance)
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move.l ComponentManagerLowMem,a1 ; point to our globals
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move.l rtInstanceTable(a1),a1 ; rtInstanceTable
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add.l d0,a1 ; point at the thingInstance record
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swap d1 ; get signature in low word
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if 1 then
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cmp.w rtiFlags(a1),d1 ; rtiFlags,rtiEntryUseCount == (theComponent>>16) ?
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bne.s @oldway ; failed the fast check, try the old way
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move.l selector(sp),d0 ; pick up selector for secondary dispatch
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move.l (sp)+,(sp) ; overwrite selector with caller's address
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move.l rtiStorage(a1),(a0) ; overwrite original thingID with rtiStorage
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move.l rtiEntry(a1),a1 ; point back to thing record
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move.l rtRoutine(a1),a1 ; pick up address of thing code
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jmp (a1) ; call the thing
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endif
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@oldway
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cmp.b rtiEntryUseCount(a1),d1 ; rtiEntryUseCount == 0xff & (theComponent>>16) ?
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bne.s @badComponentInstance ; no, clean up stack and return error!!
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move.l rtiSwitchedA5(a1),d1 ; get rtiSwitchedA5 ¥¥¥
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bne.s @validA5Component ; must swap A5 if set ¥¥¥
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@validComponent
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move.l caller(sp),(a0) ; overwrite original thingID with caller's address
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move.l a0,caller(sp) ; save pointer to caller's address
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subq #4,sp ; room for new result
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pea 8(sp) ; pointer to extended paramblock
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move.l rtiStorage(a1),-(sp) ; pass rtiStorage
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move.l rtiEntry(a1),a1 ; point back to thing record
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move.l rtRoutine(a1),a1 ; pick up address of thing code
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jsr (a1) ; call the thing
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move.l (sp)+,d0 ; get result
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move.l (sp),sp ; strip params upto caller's address
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move.l d0,4(sp) ; store result for caller
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rts
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@validA5Component
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move.l caller(sp),(a0) ; overwrite original thingID with caller's address
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move.l a5,4(a0) ; save register A5 for later restoration ¥¥¥
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move.l d1,a5 ; install rtiSwitchedA5 ¥¥¥
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move.l a0,caller(sp) ; save pointer to caller's address
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subq #4,sp ; room for new result
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pea 8(sp) ; pointer to extended paramblock
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move.l rtiStorage(a1),-(sp) ; pass rtiStorage
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move.l rtiEntry(a1),a1 ; point back to thing record
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move.l rtRoutine(a1),a1 ; pick up address of thing code
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jsr (a1) ; call the thing
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move.l (sp)+,d0 ; get result
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move.l (sp),sp ; strip params upto caller's address
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move.l 4(sp),a5 ; restore saveA5 ¥¥¥
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move.l d0,4(sp) ; store result for caller
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rts
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;-------------------------------------------------------
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; The thingInstance wasn't any good;
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; Check to see if it is a valid thing. If so,
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; Open the thing, pass on the call, and then close it.
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@badComponentInstance
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move.l a0,-(sp) ; save pointer to thingID
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clr.l -(sp) ; space for returned thingInstance
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move.l (a0),-(sp) ; ComponentError Open( thingID);
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_OpenComponent
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move.l (sp)+,d1 ; get result
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move.l (sp)+,a0 ; restore pointer to thingID
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beq.s @badComponent
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; Continue with the call:
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move.l caller(sp),(a0) ; overwrite original thingID with caller's address
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move.l d1,caller(sp) ; save thing instance for later close
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clr.l -(sp) ; room for new result
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pea 8(sp) ; pointer to extended paramblock
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move.l d1,-(sp) ; pass thing instance
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moveq #0,d0 ; Delegate needs high end clear
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bsr DelegateComponentCall ; let someone else do the work
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move.l (sp),d0 ; get result
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move.l 4(sp),a1 ; get thingInstance
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lea 9(sp),a0 ; point to what
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moveq #0,d1 ; clear out high byte ¦¦¦
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move.b (a0),d1 ; get size of parameters
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lea 3(a0,d1.w),sp ; point address of caller, strip params
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move.l d0,4(sp) ; store result for caller
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; Close the thingInstance:
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clr.w -(sp) ; room for result
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move.l a1,-(sp) ; ComponentError CloseComponent( ComponentInstance );
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_CloseComponent
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addq #2,sp ; pop result
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rts ; return result of original call
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@badComponent
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IF WARHOL_DEBUG THEN
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pea #'Bad thing call, check paramsize!'
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_DebugStr
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EndIf
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move.l (sp),a1 ; get caller's address
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lea 4(a0),sp ; pop params
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move.l #badComponentInstance,(sp) ; return invalid thing error
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jmp (a1)
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Dispatch
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delegateSelector EQU 36
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lastSelector EQU 43
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;cmp.w #-1,d0
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bmi.s ChainThingFunction
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cmp.w #delegateSelector,d0
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beq DelegateComponentCall
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cmp.w #lastSelector,d0
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bhi.s ComponentBummer
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lea ComponentDispTableHead,a0
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lsl.w #2,d0 ; don't assume 020
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IF NOT ForROM THEN
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move.l (a0,d0.w),a0
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ELSE
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move.l (a0,d0.w),a1
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adda.l a1,a0
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ENDIF
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jmp (a0)
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ComponentBummer:
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IF WARHOL_DEBUG THEN
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pea #'Bad Component Manager Selector !'
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_DebugStr
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EndIf
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swap d0 ; put the number of parameters in low word
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and.w #$FF,d0 ; mask off any cool bits
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move.l (sp)+,a0 ; get the return address
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add.w d0,sp ; pop the stack
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moveq #-1,d0 ; error into d0 for grins
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jmp (a0) ; get the hell out
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CallThingFunction
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;
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; pascal long CallThisWithTheseParams( long optional, É, long optional, struct ComponentParameters originalParams, long (*thingFunction) (É) );
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;
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;
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; Stack: ON ENTRY BEFORE thingFunction
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;
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; result result
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; optional optional
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; ÉÉ ÉÉ
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; optional optional
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; originalParams-> paramsɥ
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; flags,paramsize; what return addr¥
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; paramsÉ
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; thingFunction
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; top -> return addr
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;
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;-------------------------------------------------------
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; A7 OFFSETS OF PARAMETERS
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;
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;caller EQU 0 ; return address of caller
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;thingFunction EQU caller+4 ; routine to chain to
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;originalParams EQU thingFunction+4 ; descriptor of extra params to push
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move.l (sp)+,d2 ; save address of caller
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move.l (sp)+,a0 ; get address of routine to jmp to
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move.l (sp)+,a1 ; point at ComponentParameters struct
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moveq #0,d1
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move.b 1(a1),d1 ; get size of params to copy
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lea 4(a1,d1),a1 ; point just past params to copy
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lsr.w #2,d1 ; make into long count
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bcc.s @even
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move.w -(a1),-(sp) ; start with straggler
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bra.s @even
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@copy move.l -(a1),-(sp) ; copy params
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@even dbra d1,@copy
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move.l d2,-(sp) ; push return address
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jmp (a0) ; chain on through
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ChainThingFunction
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;
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; pascal void ChainComponentCall( long paramsize/selector, ComponentInstance ti );
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;
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;-------------------------------------------------------
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; A7 OFFSETS OF PARAMETERS
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;
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;caller EQU 0 ; return address of caller
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ComponentInstance EQU caller+4 ; routine to chain to
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originalParams EQU ComponentInstance+4 ; descriptor of extra params to push
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hisCaller EQU originalParams+4 ; descriptor of extra params to push
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addq.l #2,d0
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bne.s CallThingFunction
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addq #4,sp ; blow off caller
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move.l (sp)+,d1 ; get component instance
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move.l 4(sp),a0 ; get hisCaller
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move.l (sp)+,(sp) ; move selector on top off hisCaller
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move.l a0,-(sp) ; put back return address
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move.b 4+1(sp),d0 ; pick up size of parameters (low byte of top word of selector)
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lea 8(sp,d0.w),a0 ; point past parameters to theComponent
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bra ChainShare
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DelegateComponentCall
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;
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; pascal long DelegateComponentCall( ComponentParameters *originalParams, ComponentInstance ti );
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;
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;-------------------------------------------------------
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; A7 OFFSETS OF PARAMETERS
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;
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;caller EQU 0 ; return address of caller
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;ComponentInstance EQU caller+4 ; routine to chain to
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;originalParams EQU ComponentInstance+4 ; descriptor of extra params to push
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move.l ComponentInstance(a7),d1 ; get the thingID
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move.w d1,d0 ; make into a long (d0.l = 36)
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lsl.l #4,d0 ; multiply index by sizeof(RegisteredComponentInstance)
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move.l ComponentManagerLowMem,a0 ; point to our globals
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move.l (a0),a0 ; rtInstanceTable
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add.l d0,a0 ; point at the thingInstance record
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swap d1 ; get signature in low word
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cmp.w rtiFlags(a0),d1 ; rtiFlags,rtiEntryUseCount == (theComponent>>16) ?
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bne.s oldway ; failed the fast check, try the old way
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move.l (a0),a1 ; point back to thing record
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move.l (a1),ComponentInstance(a7) ; overwrite thingID with thing address
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addq.l #8,a0 ; needed for secondary dispatch inside component
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;-------------------------------------------------------
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; A7 OFFSETS OF PARAMETERS
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;
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;caller EQU 0 ; return address of caller
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;thingFunction EQU caller+4 ; routine to chain to
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;originalParams EQU thingFunction+4 ; descriptor of extra params to push
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;%%%% A0 and D0 are used as implicit parameters to the component %%%%
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move.l (sp)+,d1 ; save address of caller
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move.l (sp)+,d2 ; get address of routine to jmp to
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move.l (sp)+,a1 ; point at ComponentParameters struct
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move.l d1,-(sp) ; save our caller
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clr.l -(sp) ; room for function result
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move.l (a0),-(sp) ; push storage
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move.l (a1),d0 ; need selector for secondary dispatch inside component
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moveq #0,d1
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move.b 1(a1),d1 ; get size of params to copy
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lea 4(a1,d1),a1 ; point just past params to copy
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lsr.w #2,d1 ; make into long count
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bcc.s @even
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move.w -(a1),-(sp) ; start with straggler
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bra.s @even
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@copy move.l -(a1),-(sp) ; copy params
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@even dbra d1,@copy
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move.l d2,a1
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jsr (a1) ; call through and then come back
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move.l (sp)+,d0 ; pickup result
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move.l (sp)+,a0 ; our caller
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move.l d0,(sp) ; his result
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jmp (a0) ; go back
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oldway
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cmp.b rtiEntryUseCount(a0),d1 ; rtiEntryUseCount == (theComponent>>16) ?
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bne.s @badComponent ; no, clean up stack and return error!!
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move.l rtiSwitchedA5(a0),d1 ; get rtiSwitchedA5 ¥¥¥
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bne.s @validA5Component ; must swap A5 if set ¥¥¥
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@validComponent
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move.l rtiStorage(a0),ComponentInstance(a7) ; overwrite thingInstance with rtiStorage
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move.l rtiEntry(a0),a0 ; point back to thing record
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move.l rtRoutine(a0),a0 ; pick up address of thing code
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jmp (a0) ; call the thing, it returns to our caller
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@validA5Component ; must return here to restore A5 !!!
|
|
move.l originalParams(a7),a1 ; get params ptr
|
|
move.l a5,-(sp) ; save a5 for later restore
|
|
move.l d1,a5 ; install rtiSwitchedA5 ¥¥¥
|
|
clr.l -(sp) ; room for result
|
|
move.l a1,-(sp) ; push originalParams
|
|
move.l rtiStorage(a0),-(sp) ; push rtiStorage
|
|
move.l rtiEntry(a0),a0 ; point back to thing record
|
|
move.l rtRoutine(a0),a0 ; pick up address of thing code
|
|
jsr (a0) ; call the thing
|
|
|
|
move.l (sp)+,d0 ; get thing's result
|
|
move.l d0,16(sp) ; copy to our result
|
|
move.l (sp)+,a5 ; restore caller's A5
|
|
move.l (sp)+,a0 ; get address of caller
|
|
addq #8,sp ; strip params
|
|
jmp (a0) ; return to caller
|
|
|
|
|
|
@badComponent
|
|
IF WARHOL_DEBUG THEN
|
|
pea #'Bad Component passed to delegate!'
|
|
_DebugStr
|
|
ENDIF
|
|
|
|
move.l (sp)+,a0 ; get caller's address
|
|
addq #8,sp ; pop params
|
|
move.l #badComponentInstance,(sp) ; return invalid thing error
|
|
jmp (a0)
|
|
|
|
ENDPROC ; MainComponent
|
|
|
|
|
|
MACRO
|
|
ComponentDispatch &a ; ComponentDispatch(name,returnType,selector)
|
|
|
|
IF &a[3] < 0 THEN
|
|
ORG ComponentDispTableHead-(&a[3]*4)
|
|
IF ForROM THEN
|
|
IMPORT ComponentBummer
|
|
DC.L ComponentBummer-ComponentDispTableHead
|
|
ELSE
|
|
dcImportResident ComponentBummer
|
|
ENDIF
|
|
ELSE
|
|
ORG (&a[3]*4)+ComponentDispTableHead
|
|
IF ForROM THEN
|
|
IMPORT __&a[1]
|
|
DC.L __&a[1]-ComponentDispTableHead
|
|
ELSE
|
|
dcImportResident __&a[1]
|
|
ENDIF
|
|
ENDIF
|
|
ENDM
|
|
|
|
|
|
ComponentDispTableHead PROC EXPORT
|
|
|
|
INCLUDE 'ComponentManagerSelectors.h'
|
|
|
|
ENDPROC ; ComponentDispTableHead
|
|
|
|
END
|
|
|