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f9b1534e17
if a pointer points to the heap
* when a symtable is loaded, there is no need to check for duplicate
symbols. This leads to crashes because defowner isn't assigned
in this case
103 lines
2.5 KiB
ObjectPascal
103 lines
2.5 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1997-98 by Daniel Mantione
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Handles the overlay initialisation for a TP7 compiled version
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit ppovin;
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interface
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var
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ovrminsize:longint;
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procedure InitOverlay;
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implementation
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uses overlay;
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function _heaperror(size:word):integer;far;
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type
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heaprecord=record
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next:pointer;
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values:longint;
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end;
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var
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l,m:longint;
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begin
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l:=ovrgetbuf-ovrminsize;
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if (size>maxavail) and (l>=size) then
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begin
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m:=((longint(size)+$3fff) and $ffffc000);
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{Clear the overlay buffer.}
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ovrclearbuf;
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{Shrink it.}
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ovrheapend:=ovrheapend-m shr 4;
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heaprecord(ptr(ovrheapend,0)^).next:=freelist;
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heaprecord(ptr(ovrheapend,0)^).values:=m shl 12;
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heaporg:=ptr(ovrheapend,0);
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freelist:=heaporg;
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Writeln('Warning: Overlay buffer was shrunk because of memory shortage');
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_heaperror:=2;
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end
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else
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_heaperror:=0;
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end;
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procedure InitOverlay;
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begin
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heaperror:=@_heaperror;
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end;
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var
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s:string;
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begin
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s:=paramstr(0);
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ovrinit(copy(s,1,length(s)-3)+'ovr');
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if ovrresult=ovrok then
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begin
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{May fail if no EMS memory is available. No need for error
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checking, though, as the overlay manager happily runs without
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EMS.}
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ovrinitEMS;
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ovrminsize:=ovrgetbuf;
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ovrsetbuf(ovrminsize+$20000);
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end
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else
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runerror($da);
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end.
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{
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$Log$
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Revision 1.3 1999-03-17 22:23:19 florian
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* a FPC compiled compiler checks now also in debug mode in assigned
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if a pointer points to the heap
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* when a symtable is loaded, there is no need to check for duplicate
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symbols. This leads to crashes because defowner isn't assigned
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in this case
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Revision 1.2 1998/08/10 10:18:33 peter
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+ Compiler,Comphook unit which are the new interface units to the
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compiler
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}
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