线程暂停并恢复c＃

Question

I've got several threads ,how can I pause/resume them?

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From duplicate question:

How can i pause 5 threads, and to remember their status. Because one of them is eating another is thinking, etc.

Answer 1

If you're using System.Threading.Thread , then you can call Suspend and Resume . This, however is not recommended. There's no telling what a thread might be doing when you call Suspend . If you call Suspend while the thread holds a lock, for example, or has a file open for exclusive access, nothing else will be able to access the locked resource.

As the documentation for Thread.Suspend says:

Do not use the Suspend and Resume methods to synchronize the activities of threads. You have no way of knowing what code a thread is executing when you suspend it. If you suspend a thread while it holds locks during a security permission evaluation, other threads in the AppDomain might be blocked. If you suspend a thread while it is executing a class constructor, other threads in the AppDomain that attempt to use that class are blocked. Deadlocks can occur very easily.

Typically, you control threads' activity using synchronization primitives like events. A thread will wait on an event (look into AutoResetEvent and ManualResetEvent ). Or, if a thread is servicing a queue, you'll use something like BlockingCollection so that the thread can wait for something to be put into the queue. All of these non-busy wait techniques are much better than arbitrarily suspending and restarting a thread, and don't suffer from the potential disastrous consequences.

Answer 2

You have to use synchronisation techniques

MSDN Thread Synchronization

Answer 3

Have a look at Monitor.Wait and Monitor.Pulse in the first instance- Marc Gravell has a nice example used in a queue here .

In it quite likely that you want to consider using a Producer/Consumer queue.

Answer 4

In the main thread:

ManualResetEvent re = new ManualResetEvent(true);

In all the threads, at "strategic" points:

re.WaitOne();

In the main thread, to stop the threads:

re.Reset();

and to restart:

re.Set();

Answer 5

You can use Suspend() and Resume() .
http://msdn.microsoft.com/en-us/library/system.threading.thread.resume.aspx
http://msdn.microsoft.com/en-us/library/system.threading.thread.suspend.aspx
You can also read:
What are alternative ways to suspend and resume a thread?