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https://gitlab.com/freepascal.org/fpc/source.git
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114 lines
2.8 KiB
PHP
114 lines
2.8 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 the Free Pascal development team
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Implements OS dependent part for loading of dynamic libraries.
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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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{$ifdef readinterface}
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{ ---------------------------------------------------------------------
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Interface declarations
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---------------------------------------------------------------------}
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type
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TLibHandle = longint;
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const
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NilHandle = 0;
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// these are for easier crossplatform construction of dll names in dynloading libs.
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SharedSuffix = 'dll';
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{$else}
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{ ---------------------------------------------------------------------
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Implementation section
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---------------------------------------------------------------------}
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uses
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DosCalls;
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threadvar
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DynLibErrNo: cardinal;
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DynLibErrPath: array [0..259] of char;
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function LoadLibrary (const Name: AnsiString): TLibHandle;
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var
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Handle: longint;
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begin
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DynLibErrPath [0] := #0;
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DynLibErrNo := DosLoadModule (@DynLibErrPath [0], SizeOf (DynLibErrPath),
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PChar (Name), Handle);
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if DynLibErrNo = 0 then
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Result := Handle
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else
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Result := NilHandle;
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end;
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function GetProcedureAddress (Lib: TLibHandle; const ProcName: AnsiString): pointer;
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var
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P: pointer;
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begin
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DynLibErrPath [0] := #0;
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DynLibErrNo := DosQueryProcAddr (Lib, 0, PChar (ProcName), P);
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if DynLibErrNo = 0 then
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Result := P
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else
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Result := nil;
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end;
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function UnloadLibrary (Lib: TLibHandle): boolean;
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begin
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DynLibErrPath [0] := #0;
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DynLibErrNo := DosFreeModule (Lib);
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Result := DynLibErrNo = 0;
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end;
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function GetDynLibsError: longint;
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begin
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GetDynLibsError := DynLibErrNo;
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end;
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function GetDynLibsErrorStr: string;
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const
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SysMsgFile: array [0..10] of char = 'OSO001.MSG'#0;
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var
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VarArr: array [1..9] of PChar;
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OutBuf: array [0..999] of char;
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RetMsgSize: cardinal;
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RC: cardinal;
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begin
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if DynLibErrNo = 0 then
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GetDynLibsErrorStr := ''
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else
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begin
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VarArr [1] := @DynLibErrPath [0];
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RC := DosGetMessage (@VarArr, 1, @OutBuf [0], SizeOf (OutBuf),
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DynLibErrNo, @SysMsgFile [0], RetMsgSize);
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if RC = 0 then
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Result := StrPas (@OutBuf [0])
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else
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begin
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WriteStr (Result, DynLibErrNo);
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Result := 'Error ' + Result;
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end;
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if DynLibErrPath [0] <> #0 then
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Result := StrPas (@DynLibErrPath [0]) + ' - ' + Result;
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end;
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end;
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function GetLoadErrorStr: string;
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begin
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GetLoadErrorStr := GetDynLibsErrorStr;
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end;
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{$endif}
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