我们使用以下函数来获取当前引导配置指定的处理器数量.这个数字纯粹用于记录.
以下功能在XP,Vista,7,2003和2008上可以正常工作,但在Windows 2012 Server上失败.
// -1 = not implemented or not allowed // 0 = not limited // >0 = number of processors in the {current} boot entry function Internal_GetBCDNumberOfProcessors: integer; var objBcdStore : OleVariant; objElement : OleVariant; objWBL : OleVariant; objWMIService: OleVariant; begin // for more info,see: https://stackoverflow.com/questions/7517965/accessing-bcdstore-from-delphi/7527164#7527164 Result := -1; try objWMIService := GetObject('winmgmts:{(Backup,Restore)}\\.\root\wmi:BcdStore'); if (not VarIsNull(objWMIService)) and boolean(objWMIService.OpenStore('',objBcdStore)) and (not VarIsNull(objBcdStore)) and boolean(objBcdStore.OpenObject('{fa926493-6f1c-4193-a414-58f0b2456d1e}',objWBL)) and (not VarIsNull(objWBL)) then if objWBL.GetElement($25000061,objElement) and //<-- fails here on Server 2012 (not VarIsNull(objElement)) then Result := StrToIntDef(objElement.Integer,0) else Result := 0; except on E: EOleSysError do Result := -1; end; end;
如果我尝试在Win2012上运行它,objWBL.GetElement引发EOleSysError异常,文本OLE错误D0000225. Google找不到与此错误代码相关的任何有意义的内容:(
堆栈跟踪表示异常在System.Win.ComObj.DispatchInvokeError中被触发,由DispatchInvoke调用,由VarDispInvoke调用.
所有这些都是使用XE2进行复制的.我可以尝试重复XE3的问题,但我不相信Delphi RTL与它有任何关系.
有谁有任何想法可能的原因这种行为?
GetElement部分:
if objWBL.GetElement($25000061,objElement) and //<-- fails here on Server 2012 (not VarIsNull(objElement)) then Result := StrToIntDef(objElement.Integer,0) else Result := 0;
可以用EnumerateElements替换:
if objWBL.EnumerateElements(objArray) then try for i := VarArrayLowBound(objArray,1) to VarArrayHighBound(objArray,1) do begin objElement := objArray[i]; if objElement.Type = $25000061 then Exit(objElement.Integer); end; finally VarClear(objArray); end;
这不会引发EOleException,但是遗憾的是还没有找到NumberOfProcessors元素.