Re: [boost] [threadpool] new version v12

Subject: Re: [boost] [threadpool] new version v12
From: Anthony Williams (anthony.ajw_at_[hidden])
Date: 2008-11-03 09:37:13

"Giovanni Piero Deretta" <gpderetta_at_[hidden]> writes:

> On Mon, Nov 3, 2008 at 3:17 PM, Anthony Williams <anthony.ajw_at_[hidden]> wrote:
>> "Peter Dimov" <pdimov_at_[hidden]> writes:
>>
>>> Anthony Williams:
>>>> future<T> some_future;
>>>>
>>>> try
>>>> {
>>>>    throw my_exception();
>>>> }catch(...)
>>>> {
>>>>    some_future.wait(); // may invoke task from pool if some_future
>>>>                        // not ready
>>>>    throw; // oops, where's my exception state gone?
>>>> }
>>>
>>> Are you sure that the above doesn't work?
>>>
>>> try
>>> {
>>>        throw my_exception();
>>> }
>>> catch(...)
>>> {
>>>    try
>>>    {
>>>        call_function_that_throws();
>>>    }
>>>    catch( ... )
>>>    {
>>>    }
>>>
>>>    throw; // works
>>> }
>>
>> No, I'm not sure, but if some_future.wait() switches to a new fiber I
>> am concerned that it won't, because the exception state is per-thread,
>> not per-fiber.
>>
>
>  Win32 fibers take care of it;

AFAIK, only on Vista. I'd be glad to know I was mistaken.

Anthony
-- 
Anthony Williams
Author of C++ Concurrency in Action | http://www.manning.com/williams
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