Re: [boost] [thread] new thread_pool and dispatcher classes

From: Atry (pop.atry_at_[hidden])
Date: 2007-05-07 07:51:29

Christopher Kohlhoff 写道:
> On Mon, 07 May 2007 07:18:33 +0300, "Yuval Ronen"
> <ronen_yuval_at_[hidden]> said:
>   
>> Atry wrote:
>>     
>>> We already have thread pool and dispatcher in Boost.Asio, although it is 
>>> a very simple one.
>>>       
>> Oh, I didn't know that. Thanks for the pointer! Do they provide the same 
>> functionality (in general, not up to the last feature)? I will take a 
>> look at them. IMO, if they are like mine, they should reside in 
>> Boost.Thread rather than in Asio.
>>     
>
> Asio doesn't include any functionality to spawn threads (in a pool or
> otherwise). However, the io_service class can be used to dispatch work
> items in a thread pool using a combination of io_service::post() and
> io_service::run(). It's the same mechanism that is used to dispatch
> completion handlers for asynchronous operations.
>
> Cheers,
> Chris
> _______________________________________________
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>
>   
Yes. But in most cases only fixed number of threads is needed, so I 
think io_service is enough.
And I have another question. Do we need to implement another message 
queue or dispatcher if we need another event handler in a special case, 
such as gui or thread pool? Or, we have only one public interface (like 
io_service) for a "event queue", and repost any native event/message to it?