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72be688a8c
compiler/ngenutil.pas, tnodeutils: * InsertThreadvarTablesTable: reference a unit's (and the program's) threadvar table using a indirect symbol * InsertThreadvars: generate an indirect symbol for the threadvar table rtl/inc/threadvr.inc: * TltvInitTablesTable: add an additional indirection for the tables field git-svn-id: trunk@34043 -
125 lines
3.5 KiB
PHP
125 lines
3.5 KiB
PHP
{
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by Michael Van Canneyt
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member of the Free Pascal development team
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Threadvar support, platform independent part
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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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.
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**********************************************************************}
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{*****************************************************************************
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Threadvar support
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*****************************************************************************}
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type
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pltvInitEntry = ^ltvInitEntry;
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ppltvInitEntry = ^pltvInitEntry;
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ltvInitEntry = packed record
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varaddr : {$ifdef cpu16}pword{$else}pdword{$endif};
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size : longint;
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end;
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TltvInitTablesTable = packed record
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count : dword;
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tables : packed array [1..{$ifdef cpu16}16{$else}32767{$endif}] of {$ifdef ver3_0}pltvInitEntry{$else}ppltvInitEntry{$endif};
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end;
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PltvInitTablesTable = ^TltvInitTablesTable;
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{$ifndef FPC_HAS_INDIRECT_ENTRY_INFORMATION}
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var
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ThreadvarTablesTable : TltvInitTablesTable; external name 'FPC_THREADVARTABLES';
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{$endif FPC_HAS_INDIRECT_ENTRY_INFORMATION}
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procedure init_unit_threadvars (tableEntry : pltvInitEntry);
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begin
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while tableEntry^.varaddr <> nil do
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begin
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CurrentTM.InitThreadvar (tableEntry^.varaddr^, tableEntry^.size);
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inc (pchar (tableEntry), sizeof (tableEntry^));
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end;
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end;
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procedure init_all_unit_threadvars;
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var
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i : longint;
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begin
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{$ifdef FPC_HAS_INDIRECT_ENTRY_INFORMATION}
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with PltvInitTablesTable(EntryInformation.ThreadvarTablesTable)^ do
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{$else FPC_HAS_INDIRECT_ENTRY_INFORMATION}
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with ThreadvarTablesTable do
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{$endif FPC_HAS_INDIRECT_ENTRY_INFORMATION}
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begin
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{$ifdef DEBUG_MT}
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WriteLn ('init_all_unit_threadvars (',count,') units');
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{$endif}
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for i := 1 to count do
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init_unit_threadvars (tables[i]{$ifndef ver3_0}^{$endif});
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end;
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end;
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procedure copy_unit_threadvars (tableEntry : pltvInitEntry);
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var
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oldp,
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newp : pointer;
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begin
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while tableEntry^.varaddr <> nil do
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begin
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newp:=CurrentTM.RelocateThreadVar(tableEntry^.varaddr^);
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oldp:=pointer(pchar(tableEntry^.varaddr)+sizeof(pointer));
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move(oldp^,newp^,tableEntry^.size);
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inc (pchar (tableEntry), sizeof (tableEntry^));
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end;
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end;
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procedure copy_all_unit_threadvars;
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var
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i: longint;
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begin
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{$ifdef FPC_HAS_INDIRECT_ENTRY_INFORMATION}
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with PltvInitTablesTable(EntryInformation.ThreadvarTablesTable)^ do
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{$else FPC_HAS_INDIRECT_ENTRY_INFORMATION}
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with ThreadvarTablesTable do
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{$endif FPC_HAS_INDIRECT_ENTRY_INFORMATION}
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begin
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{$ifdef DEBUG_MT}
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WriteLn ('copy_all_unit_threadvars (',count,') units');
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{$endif}
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for i := 1 to count do
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copy_unit_threadvars (tables[i]{$ifndef ver3_0}^{$endif});
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end;
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end;
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procedure InitThreadVars(RelocProc : TRelocateThreadVarHandler);
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begin
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{ initialize threadvars }
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init_all_unit_threadvars;
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{ allocate mem for main thread threadvars }
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CurrentTM.AllocateThreadVars;
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{ copy main thread threadvars }
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copy_all_unit_threadvars;
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{ install threadvar handler }
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fpc_threadvar_relocate_proc:=RelocProc;
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{$ifdef FPC_HAS_FEATURE_HEAP}
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{$ifndef HAS_MEMORYMANAGER}
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{$ifndef FPC_NO_DEFAULT_HEAP}
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RelocateHeap;
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{$endif ndef FPC_NO_DEFAULT_HEAP}
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{$endif HAS_MEMORYMANAGER}
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{$endif}
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end;
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