Question

我在Inno安装程序中有点腌菜：在用户计算机上，我的安装程序运行缓慢（我还没有诊断的东西，可能是该计算机特有的问题，我仍然不知道）。这导致所述用户再次运行安装程序，而第一个实例仍在执行 - 令我惊讶的是，他们似乎都在运行一段时间，然后崩溃并烧毁......

我四处搜索但没有找到任何方法来禁用此行为 - 我的大部分疑问都在Inno Setup互斥功能上完成，这并不是我真正想要的。任何人都有关于如何确保安装程序只有一个实例/进程执行的提示？谢谢！

Answer 1

自Inno Setup 5.5.6起，您可以使用SetupMutex指令：

[Setup]
AppId=MyProgram
SetupMutex=SetupMutex{#SetupSetting("AppId")}

如果要更改已在另一个安装程序运行时显示的消息文本，请使用：

[Messages]
SetupAppRunningError=Setup has detected that %1 is currently running.%n%nPlease close all instances of it now, then click OK to continue, or Cancel to exit.

在此版本之前，没有可用的内置机制。但你可以简单地写自己的。原则是您在安装程序启动时创建一个唯一的互斥锁。但是，首先检查是否已经创建了这样的互斥锁。如果是，则退出设置，否则，创建互斥锁：

[Setup]
AppName=My Program
AppVersion=1.5
DefaultDirName={pf}\My Program

[Code]
const
  // this needs to be system-wide unique name of the mutex (up to MAX_PATH long),
  // there is a discussion on this topic http://stackoverflow.com/q/464253/960757
  // you can expand here e.g. the AppId directive and add it some 'salt'
  MySetupMutex = 'My Program Setup 2336BF63-DF20-445F-AAE6-70FD7E2CE1CF';

function InitializeSetup: Boolean;
begin
  // allow the setup to run only if there is no thread owning our mutex (in other
  // words it means, there's no other instance of this process running), so allow
  // the setup if there is no such mutex (there is no other instance)
  Result := not CheckForMutexes(MySetupMutex);
  // if this is the only instance of the setup, create our mutex
  if Result then
    CreateMutex(MySetupMutex)
  // otherwise tell the user the setup will exit
  else
    MsgBox('Another instance is running. Setup will exit.', mbError, MB_OK);
end;

Answer 2

如果您的安装程序名为setup.exe，那么您可以使用以下代码检查setup.exe是否正在运行并终止安装。

[Code]
function IsAppRunning(const FileName : string): Boolean;
var
    FSWbemLocator: Variant;
    FWMIService   : Variant;
    FWbemObjectSet: Variant;
begin
    Result := false;
    FSWbemLocator := CreateOleObject('WBEMScripting.SWBEMLocator');
    FWMIService := FSWbemLocator.ConnectServer('', 'root\CIMV2', '', '');
    FWbemObjectSet := FWMIService.ExecQuery(Format('SELECT Name FROM Win32_Process Where Name="%s"',[FileName]));
    Result := (FWbemObjectSet.Count > 0);
    FWbemObjectSet := Unassigned;
    FWMIService := Unassigned;
    FSWbemLocator := Unassigned;
end;

function InitializeSetup: boolean;
begin
  result := not IsAppRunning('setup.exe');
  if not result then
    MsgBox('setup.exe is already running', mbError, MB_OK);
end;

Inno Setup - 防止同时多次执行安装程序

2 个答案: