New subject: [boost::thread] interrupt a future get boost::unknown_exception

18 Mar 2011

      [Windows XP, VC++ 10, boost 1.46]
When interrupt a future, the future.get() throw boost::unknown_exception,
Not boost::thread_interrupted. 

Class boost::thread_interrupted should have a base class for current_exception_impl() to catch it ? or use BOOST_THROW_EXCEPTION in interruptible_wait) ?

///////////////
namespace boost
{
    class thread_interrupted
    {};
}

exception_ptr current_exception_impl()
	{
		try
		{
			throw;
		}
         catch(
            exception_detail::clone_base & e )
                {
                return exception_ptr(e.clone());
                }
          ................
		catch(
            std::exception & e )
                {
                return exception_detail::current_exception_unknown_std_exception(e);
                }
            catch(
            boost::exception & e )
                {
                return exception_detail::current_exception_unknown_boost_exception(e);
                }
            catch(
            ... )
                {
                return exception_detail::current_exception_unknown_exception();
                }

// unknown_exception//////////////////
ERROR: Throw in function (unknown)
Dynamic exception type: class boost::exception_detail::clone_impl<class boost::unknown_exception>
std::exception::what: Unknown exception

//code /////////////////////
#include 
#include 
#include  
using namespace boost::posix_time;
using namespace boost; 

int main(int argc, char** argv)
{ 
	boost::packaged_task<int> pt(
		[=]()->int
	{ 
		this_thread::sleep(seconds(1000)); 
		return 0;
	}
	);
	boost::unique_future<int> fi = pt.get_future(); 
	boost::thread task(std::move(pt)); // launch task on a thread 

	task.interrupt();  

	try
	{		
		int v = fi.get();	
	} 
	catch (boost::exception& exc)
	{		
		std::cerr << "ERROR: " << boost::diagnostic_information(exc) << std::endl; 
	}
}

[boost::thread] interrupt a future get boost::unknown_exception

乔志强

Viatcheslav.Sysoltsev＠h-d-gmbh.de

Emil Dotchevski

Steven Watanabe

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