删除 boost::interprocess::named_mutex 的问题

Question

我做了下面的程序，但最终没有删除named_mutex，打印出“Mutex delete failure”的结果

void IPC::testNamedMutex()
{
named_mutex mutex(open_or_create, "MyMutex");
for (int i = 0; i < 10; i++)
{
    mutex.lock();
    cout << "Mutex taken" << endl;

    std::fstream fs("test.txt", std::fstream::out | std::fstream::app);
    if (fs)
    {
        fs << "Thread id: " << boost::this_thread::get_id() << ", "
                << "Iteration " << i << endl;
    }

    boost::this_thread::sleep(boost::posix_time::seconds(1));
    mutex.unlock();
    cout << "Mutex is unlocked" << endl;

}
cout << "Delete the file and mutex?(y/n): ";
char c;
cin >> c;
if (c == 'y' || c == 'Y')
{
    if (remove("test.txt"))
        cout << "File deleted" << endl;
    else
        cout << "File delete failed" << endl;

    bool success=named_mutex::remove("MyMutex");
    if (success)
        cout << "Mutex removed" << endl;
    else
        cout << "Mutex delete failure" << endl;
}
}

但是，如果我使用如下所示的第二个程序运行删除，它可以工作。可能是什么原因？

void IPC::testDeleteNamedMutex()
{
cout << named_mutex::remove("MyMutex") << endl;
}

Answer 1

AFAIK 如果在提升的上下文中运行时创建了互斥锁，但您尝试以普通用户身份将其删除，则会在 Windows 上发生这种情况。

也就是说，UAC 又把事情搞砸了。

理论上，您应该能够设置 ACL（访问控制列表）以向预期的用户/组授予权限。我没试过这个。如果您需要，我会咨询 Technet 和/或您当地的管理员以了解更多信息。