Re: [boost] [threadpool] new version v12

Subject: Re: [boost] [threadpool] new version v12
From: Anthony Williams (anthony.ajw_at_[hidden])
Date: 2008-11-03 09:17:10

"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.

Anthony
-- 
Anthony Williams
Author of C++ Concurrency in Action | http://www.manning.com/williams
Custom Software Development | http://www.justsoftwaresolutions.co.uk
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