Re: [boost] [thread] Bug sprint: #2100 thread fails to compile with -fno-exceptions

Subject: Re: [boost] [thread] Bug sprint: #2100 thread fails to compile with -fno-exceptions
From: Vicente Botet Escriba (vicente.botet_at_[hidden])
Date: 2009-11-24 22:14:22

Bugzilla from anthony.ajw_at_[hidden] wrote:
> 
> Vicente Botet Escriba <vicente.botet_at_[hidden]> writes:
> 
>> Ticket description: "The thread component fails to compile with GCC when
>> -fno-exceptions is specified. The attached patch allows the libraries /
>> tests shipped with boost 1.35.0 to compile. There didn't seem to be a
>> better
>> option to make g++ happy than to just #ifndef out the catch(...) block,
>> as
>> it would otherwise complain about the throw in the block." from
>> https://svn.boost.org/trac/boost/ticket/2100
>>
>> Hi, I think that Boost.Thread has not been designed to work without
>> exception. What would be the behavior of the application if we remove
>> just
>> any throw statement? In order to achieve the reporter goal, we should
>> need
>> to add functions returning a return code. IMO this is out of the scope
>> currently. Thus I propose to close the ticket.
> 
> I've committed a change to trunk that uses boost::throw_exception in
> most cases. The only cases I haven't touched are where
> thread_interrupted is thrown at a cancellation point.
> 
> As you say, Boost.Thread has not been designed to work without
> exceptions. In most cases this is not a problem, but interruption relies
> on exceptions to work properly. I'm therefore inclined to think that
> interruption should not be available with exceptions disabled, in which
> case this code can be masked with a #ifdef
> 
> What do you think?
> 
> 

Hi,

the use of   boost::throw_exception is welcome but more for the ability this
function provides to store a pointer to an exception than the ability to
disable exception. If in addition you use some ifdefs to mask features that
are not easy to provide without exceptions the reporter of the ticket could
use Boost.Thread on an environment that has or  requires no exceptions.

I don't understand however how an application can work without taking care
of errors. Just my point of view.

Thanks,
Vicente
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