Re: [boost] Re: Re: Threads & Exceptions

From: William Kempf (williamkempf_at_[hidden])
Date: 2002-08-11 08:48:56

>From: "Victor A. Wagner, Jr." <vawjr_at_[hidden]>
>At Thursday 2002/08/08 07:49, you wrote:
>>----- Original Message -----
>>From: "Victor A. Wagner, Jr." <vawjr_at_[hidden]>
>> > The C++ standard is silent on the topic of thread(s)
>>
>>But not on the behavior of a program that has an exception thrown that 
>>would
>>propogate out of main().
>
>I fail to see how an exception which is "started" by thread<whatever> can 
>be considered "inside" of main.  And if it IS, then clearly I should be 
>able to write:
>catch(...)
>{
>}
>to process it

Being "started by thread<whatever>" has nothing to do with it.

void my_thread(boost::thread* pthread)
{
   try
   {
      pthread->join();
   }
   catch(...)
   {
      cout << "main() threw an exception" << endl;
   }
   delete pthread;
}

int main()
{
   boost::thread* main = new thread();
   boost::thread thrd(boost::bind(&my_thread, main));
   thread_exit(); // Yes, this is something that needs added to
                  // Boost.Threads, and will be.
   throw "error!";
}

The above can't be done portably, AFAIK, and is likely to result in 
termination instead of the expected passage in join().

Bill Kempf

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