在Inno Setup中查询可用的RAM

问题描述：

我需要获取可用的RAM才能确定软件的某些特征.

I need to get the available RAM to determinate some characteristics to my software.

我有以下代码来显示PC的RAM:

I have this code to show my PC's RAM:

type
  DWORDLONG = Int64;
  TMemoryStatusEx = record
    dwLength: DWORD;
    dwMemoryLoad: DWORD;
    ullTotalPhys: DWORDLONG;
    ullAvailPhys: DWORDLONG;
    ullTotalPageFile: DWORDLONG;
    ullAvailPageFile: DWORDLONG;
    ullTotalVirtual: DWORDLONG;
    ullAvailVirtual: DWORDLONG;
    ullAvailExtendedVirtual: DWORDLONG;
  end;

function GlobalMemoryStatusEx(var lpBuffer: TMemoryStatusEx): BOOL;
  external 'GlobalMemoryStatusEx@kernel32.dll stdcall';

function InitializeSetup: Boolean;
var
  MemoryStatus: TMemoryStatusEx;
  RAM: String;
begin
  Result := True;
  MemoryStatus.dwLength := SizeOf(MemoryStatus);
  if GlobalMemoryStatusEx(MemoryStatus) then
  begin
    RAM := Int64ToStr(MemoryStatus.ullTotalPhys/1000000000);
    MsgBox('This PC has '+RAM+' GB of RAM', mbInformation, MB_OK);
  end;
end;

基于 Inno设置-如何我在安装之前/安装过程中检查系统规格吗?

答

如果您已经具有

If you already have the code for GlobalMemoryStatusEx from Inno Setup - How can I check system specs before/during installation?, just use the ullAvailPhys field.

另一种可能性是使用 WMI查询:

var
  Query: string;
  WbemLocator, WbemServices, WbemObjectSet: Variant;
  OperatingSystem: Variant;
begin
  WbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
  WbemServices := WbemLocator.ConnectServer('.', 'root\CIMV2');
  Query := 'SELECT FreePhysicalMemory FROM Win32_OperatingSystem';
  WbemObjectSet := WbemServices.ExecQuery(Query);
  if not VarIsNull(WbemObjectSet) and (WbemObjectSet.Count > 0) then
  begin
    OperatingSystem := WbemObjectSet.ItemIndex(0);
    Log(Format('Free physical memory = %d GB', [
      Integer(OperatingSystem.FreePhysicalMemory div (1024*1024))]));
  end;
end;

另请参见是否可以通过Inno Setup读取系统信息(其中还显示了如何检索使用WMI查询的总物理内存.)

See also Is there a way to read the system's information in Inno Setup (shows, among other, how to retrieve total physical memory using WMI query).

在Inno Setup中查询可用的RAM

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