如何从句柄获取事件的名称
我有一组 Win32 事件句柄，正在使用 WaitForMultipleObjects() 等待它们。这将返回触发的事件数组中的索引，但我需要知道的是事件的名称。我一直在浏览 MSDN，但看不到任何可以执行此操作的内容。
基本上，我有一个类，它在定义的时间段内使用 RegNotifyChangeKeyValue() 通过事件监视注册表，但在启动之前，其他类会注册对键和值的兴趣。然后，我在一个单独的线程上等待并报告已修改的键的名称。事件名称是该事件的关键，直到运行时我才知道其中会有多少个或者它们将被称为什么。我不想为每个键创建一个线程，因为它的性能不是很好。
有谁知道如何获取事件名称或更好的方法？
I have an array of Win32 event handles that I'm waiting on using WaitForMultipleObjects(). This returns the index in the array of events that triggered but what I need to know is the name of the event. I've been looking through MSDN and can't see anything to do this.
Basically I have a class that monitors the registry through events using RegNotifyChangeKeyValue() for a defined period of time but before it starts other classes register there interest in keys and values. I then wait on a separate thread and report back the name of the keys that have been modified. The event name is the key that the event is for and I don't know until runtime how many of these there will be or what they will be called. I don't want to create one thread per key as it's not very performant.
Does anyone know how to get the event name or a better way of doing this?
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您可能可以使用未记录的 NT 内容来完成此操作，也许
NtQueryObject(handle,ObjectNameInformation,....)You could probably do it with undocumented NT stuff, maybe
NtQueryObject(handle,ObjectNameInformation,....)就我个人而言，我不会那样做。在事件和键名称之间创建您自己的映射（std::map？），然后在发出事件信号时执行您自己的查找。
Personally I wouldn't do it that way. Create your own mapping (std::map?) between event and key name and then do your own lookup when an event is signalled.
通常，事件的名称用于调用 OpenEvent() 来获取句柄。这样，您不需要在运行时传递句柄，而是确定事件名称的命名约定。
我可以想到三种方法来做到这一点：
您是否根据事件的名称决定采取哪些操作？一个“if else if”语句，它逐一检查句柄的名称以确定要采取什么操作？这种情况通常会让我考虑将继承作为一种潜在的解决方案。请耐心等待一下。
如果您创建一个基类（例如 EventAction）怎么办？它有一个事件句柄和一个虚拟成员函数 go_go_commandos()。您可以从它派生出每个需要采取操作的“事件”，并在每个派生类的 go_go_commandos() 方法中实现该操作。
现在你需要的是一个容器，这样你就可以说actionlist->GetEventAction(handle)->go_go_commandos()。
这有帮助吗？
Normally the name of an event is used to call OpenEvent() to get the Handle. This way, you don't need to communicate a handle at runtime, but instead settle on a naming convention for the name of the event.
I can think of three ways to do this:
Are you deciding what actions to take based on the name of the event? An 'if else if' statement that checks the names of the handles one-by-one to determine what action to take? This kind of scenario usually leads me to consider inheritance as a potential solution. Bear with me for a bit.
What if you create a base class, say EventAction. This has a handle to an event, and a virtual member function go_go_commandos(). You derive from it for each 'event' that has an action to be taken, and implement the action in the go_go_commandos() method of each deriving class.
Now what you need is a container so you can say actionlist->GetEventAction( handle )->go_go_commandos().
Did that help at all?