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70 lines
2.3 KiB
Plaintext
70 lines
2.3 KiB
Plaintext
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; File: ProcessManagerSegmentTweaks.a
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;
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; Contains: Code to do smarter loading of Process Manager segments to reduce
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; system heap fragmentation. Based on Greg<65>s 7 Up code.
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;
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; Written by: Dean Yu
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;
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; Copyright: <09> 1991 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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; <1> 12/16/91 DTY first checked in
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;
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; To do: Take decompression slop into account (this doesn<73>t happen yet, but it might)
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;
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load 'StandardEqu.d'
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include 'LinkedPatchMacros.a'
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;
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; Loading these segments lower in the system heap helps reduce fragmentation of the
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; system heap. Preloading resources from the System file doesn<73>t work because they
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; come in before the decompression hooks are installed. For each Process Manager
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; segment in our list, find out it<69>s size, reserve enough space for it, and load
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; it low in the heap.
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;
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kProcessManagerSegmentType equ 'scod' ; Process Manager segment resource type
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LoadProcessManagerSegmentsLowerInSysHeap InstallProc (Plus,SE,II,IIci,Portable)
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subq #2,sp
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_CurResFile ; Remember the current resource file
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clr.w -(sp)
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_UseResFile ; Work on the System file
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move.b ResLoad,-(sp) ; Save current resource load state
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lea ProcessManagerSegmentTable,a4 ; Table of Process Manager segments to load low
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@loadLoop
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move.w (a4)+,d7 ; Get the segment number
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bz.s @doneWithSegments ; Did <20>em all
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sf ResLoad ; Don<6F>t load in resources
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subq #8,sp ; Space for _SizeResource result too
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move.l #kProcessManagerSegmentType,-(sp)
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move.w d7,-(sp)
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_Get1Resource
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_SizeRsrc ; Find out how big it is
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move.l (sp)+,d0 ; Get the size
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_ResrvMem ,Sys ; Make some space low in the heap
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st ResLoad ; Load it in for real now
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subq #4,sp
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move.l #kProcessManagerSegmentType,-(sp)
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move.w d7,-(sp)
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_Get1Resource ; Load it in
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addq #4,sp ; We don<6F>t really care about the resource
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bra.s @loadLoop
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@doneWithSegments
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move.b (sp)+,ResLoad ; Restore resource load state
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_UseResFile ; The current resource file is on the stack
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rts
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ProcessManagerSegmentTable
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dc.w $BFAC ; MiscSeg
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dc.w $BFB0 ; KernelSeg
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dc.w $BFB2 ; EPPCSeg
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dc.w 0 ; End of table
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EndProc
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End
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