C#锁定和异步方法 [英] C# Lock and Async Method

问题描述

我不清楚(并且找不到足够清晰的文档):在异步方法中使用lock关键字时:如果对象已被阻塞，线程将被阻塞，还是返回挂起状态的任务(不是阻塞线程，并在释放锁定时返回)?

I am not clear (and can't find documentation clear enough): when using the lock keyword in an async method: will the thread be blocked if the object is already blocked or will it return a task in suspended state (not blocking the thread, and returning when the lock is released)?

在下面的代码中，该行会阻塞线程吗?如果它阻塞了线程(这是我的想法)，是否有一个标准的不阻塞解决方案?我正在考虑使用 AsyncLock ，但是首先我想尝试一些标准的东西

In the code below, will the line block the thread? If it blocks the thread (which is what I think), is there an standard not blocking solution? I am considering using AsyncLock, but first I wanted to try for something standard.

谢谢.

private object myLock = new object(); 

private async Task MyMethod1(){
  lock (myLock ) {// <---- will this line cause a return of the current method as an Await method call would do if myLock was already locked. 

    .... 
  }
}

// other methods that lock on myLock

推荐答案

不会.

lock是Monitor.Enter和Monitor.Exit的语法糖. lock将继续在方法中执行，直到释放锁定为止.它在任何形式，形状或形式上都不像await.

lock is syntactic sugar for Monitor.Enter and Monitor.Exit. lock will keep execution in the method until the lock is released. It does not function like await in any way, shape or form.

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