由网友(采桑子)分享简介：你将如何实现的东西的工作方式类似于异步CTP 等待关键字？有一个简单的实现，就像等待在所有情况下，或确实等待需要不同的实现不同场景？How would you implement something that works similarly to the Async CTP await keyword? Is the...

你将如何实现的东西的工作方式类似于异步CTP 等待关键字？有一个简单的实现，就像等待在所有情况下，或确实等待需要不同的实现不同场景？

How would you implement something that works similarly to the Async CTP await keyword? Is there a simple implementation that works like await in all cases, or does await require different implementations for different scenarios?

推荐答案

计谋总是涉及同一种转变 - 但它是一个pretty的痛苦之一。在库的侧等待是不是太复杂，但棘手的一​​点是，编译器生成一个状态机的你，让延续跳回到正确的地方。

await always involves the same kind of transformation - but it's a pretty painful one. The library side of await isn't too complicated, but the tricky bit is that the compiler builds a state machine for you, allowing the continuation to jump back to the right place.

这是的可能的，我的一些哈克使用iterator块（收益率的回报），你可以类似的假的东西......但是这将是pretty的难看。

It's possible that my some hacky use of iterator blocks (yield return) you could fake something similar... but it would be pretty ugly.

我给了一个 DevEx preSS研讨会一几个星期前， - 这显示了反编译code从几个例子，以及解释如何编译器生成一个任务回来，什么是awaiter必须做。这可能是对你有用。

I gave a DevExpress webinar on what the compiler is doing behind the scenes a few weeks ago - that shows decompiled code from a couple of examples, as well as explaining how the compiler builds a task to return, and what the "awaiter" has to do. It may be useful to you.