c# - WaitAll 限制

Question

我听说在多个线程上使用 waitall 时存在限制(要等待的线程数？)。谁能给详细点？

Answer 1

我认为你所指的限制不是线程的数量；它取决于正在等待的句柄 的数量。来自MSDN page对于 WaitHandle.WaitAll(WaitHandle[]):

On some implementations, if more than 64 handles are passed, a NotSupportedException is thrown.

在极少数情况下会出现此问题，我通常使用以下方法解决它:

WaitHandle[] handles = ...

foreach(var waitHandle in handles)
   waitHandle.WaitOne();

为了完整起见，其他限制似乎是:

If the array contains duplicates, the call fails with a DuplicateWaitObjectException.

The WaitAll method is not supported on threads that have STAThreadAttribute.