您可以從擴展RTTI中提取調用約定信息(自2010年起可用)。
uses RTTI, TypInfo;
function GetMethCallConv(AMeth: TMethod; out Conv: TCallConv): Boolean;
var
Ctx: TRttiContext;
Meth: TRttiMethod;
Typ: TRttiType;
begin
Ctx:= TRttiContext.Create;
try
Typ:= Ctx.GetType(TObject(AMeth.Data).ClassType);
for Meth in Typ.GetMethods do begin
if Meth.CodeAddress = AMeth.Code then begin
Conv:= Meth.CallingConvention;
Exit(True);
end;
end;
Exit(False);
finally
Ctx.Free;
end;
end;
//test
type
TMyObj = class
public
procedure MyMeth(I: Integer); stdcall;
end;
procedure TMyObj.MyMeth(I: Integer);
begin
ShowMessage(IntToStr(I));
end;
procedure TForm2.Button2Click(Sender: TObject);
var
Conv: TCallConv;
Meth: TMethod;
MyObj: TMyObj;
begin
MyObj:= TMyObj.Create;
Meth.Code:= @TMyObj.MyMeth;
Meth.Data:= MyObj;
if GetMethCallConv(Meth, Conv) then begin
case Conv of
ccReg: ShowMessage('Register');
ccCdecl: ShowMessage('cdecl');
ccPascal: ShowMessage('Pascal');
ccStdCall: ShowMessage('StdCall');
ccSafeCall: ShowMessage('SafeCall');
end;
end;
MyObj.Free;
end;
更新
對於 「經典」 RTTI閱讀Sertac答案;以下作品於2010年德爾福OK:
uses ObjAuto;
function GetMethCallConv2(AMeth: TMethod; out Conv: TCallingConvention): Boolean;
var
Methods: TMethodInfoArray;
I: Integer;
P: PMethodInfoHeader;
begin
Result:= False;
Methods:= GetMethods(TObject(AMeth.Data).ClassType);
if not Assigned(Methods) then Exit;
for I:= Low(Methods) to High(Methods) do begin
P:= Methods[I];
if P^.Addr = AMeth.Code then begin
Inc(Integer(P), SizeOf(TMethodInfoHeader) - SizeOf(ShortString) + 1 +
Length(PMethodInfoHeader(P)^.Name));
Conv:= PReturnInfo(P).CallingConvention;
Result:= True;
Exit;
end;
end;
end;
{$TYPEINFO ON}
{$METHODINFO ON}
type
TMyObj = class
public
procedure MyMeth(I: Integer);
end;
procedure TMyObj.MyMeth(I: Integer);
begin
ShowMessage(IntToStr(I));
end;
procedure TForm2.Button3Click(Sender: TObject);
var
Conv: TCallingConvention;
Meth: TMethod;
MyObj: TMyObj;
begin
MyObj:= TMyObj.Create;
Meth.Code:= @TMyObj.MyMeth;
Meth.Data:= MyObj;
if GetMethCallConv2(Meth, Conv) then begin
case Conv of
ccRegister: ShowMessage('Register');
ccCdecl: ShowMessage('cdecl');
ccPascal: ShowMessage('Pascal');
ccStdCall: ShowMessage('StdCall');
ccSafeCall: ShowMessage('SafeCall');
end;
end;
MyObj.Free;
end;
謝謝! 「經典」RTTI如何? – 2011-05-22 08:04:51
沒有經典rtti的機會。 – 2011-05-23 13:30:47