CGAL users discussion list

["Thomas Zangl - Home" <>]

Am Sun, 8 Jun 2008 13:06:53 +0200, schrieb "Thomas Zangl - Home" 
<>:

Hi all!

I wrote the mail below on 8th June and did not receive any reply. Maybe
someone can comment on it? This would *greatly* help. Thank you!

>I want to use CGAL´s Delaunay Triangulation inside multiple threads
>where each thread can run on a different CPU. I use boost::thread and the
>threadpool from threadpool.sf.net. 
>
>What do I need to obey if I want to use CGAL with multiple threads? How
>threadsafe are the triangulatione etc.? 
>
>I get various signal 11 errors when I e.g. ask for the dual of a Delaunay
>Triangulation face and so on. Errors like this:
>*** glibc detected *** corrupted double-linked list: 0x0d1f81b8 ***
>
>Core dump says:
>#0  0x0819dbac in _int_malloc ()
>#1  0x0819f7e6 in malloc ()
>#2  0x08172af8 in operator new ()
>#3  0x080d3e04 in 
>CGAL::Lazy_construction<CGAL::Lazy_kernel<CGAL::Simple_cartesian<CGAL::Gmpq>,
> CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::To_interval<CGAL::Gmpq> > >, 
>CGAL::CommonKernelFunctors::Construct_segment_3<CGAL::Simple_cartesian<CGAL::Interval_nt<false>
> > >, 
>CGAL::CommonKernelFunctors::Construct_segment_3<CGAL::Simple_cartesian<CGAL::Gmpq>
> > 
>>::operator()<CGAL::Point_3<CGAL::Lazy_kernel<CGAL::Simple_cartesian<CGAL::Gmpq>,
> CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::To_interval<CGAL::Gmpq> > > >, 
>CGAL::Point_3<CGAL::Lazy_kernel<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<fals
> e> >, CGAL::To_interval<CGAL::Gmpq> > > > > ()
>#4  0x080d7cb6 in 
>CGAL::DT3<CGAL::Lazy_kernel<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::To_interval<CGAL::Gmpq> > >, 
>CGAL::TDS3<CGAL::TH_vb3<CGAL::Triangulation_vertex_base_with_info_3<boost::shared_ptr<Isp>,
> CGAL::Lazy_kernel<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::To_interval<CGAL::Gmpq> > >, 
>CGAL::T_vb3<CGAL::Lazy_kernel<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, 
>CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
>CGAL::To_interval<CGAL::Gmpq> > >, CGAL::TDS_vb3<void> > > >, 
>CGAL::Triangulation_cell_base_with_info_3<boost::shared_ptr<DCellPropert
> y>, CGAL::Lazy_kernel<CGAL::Simple_cartesian<CGAL::Gmpq>, 
> CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
> CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, 
> CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
> CGAL::To_interval<CGAL::Gmpq> > >, 
> CGAL::T_cb3<CGAL::Lazy_kernel<CGAL::Simple_cartesian<CGAL::Gmpq>, 
> CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
> CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, 
> CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, 
> CGAL::To_interval<CGAL::Gmpq> > >, CGAL::TDS_cb3<void> > > > >::dual ()
>#5  0x080cafd0 in DFacetProperty::setDual ()
>#6  0x080d9143 in DCellProperty::insertFacets ()
>#7  0x080dd258 in CComponent::dtriangulate ()
>#8  0x080ddafa in CComponent::doWork ()
>#9  0x0805d4bc in boost::function0<void, 
>std::allocator<boost::function_base> >::operator() ()
>#10 0x0805d955 in 
>boost::threadpool::detail::worker_thread<boost::threadpool::detail::pool_core<boost::function0<void,
> std::allocator<boost::function_base> >, boost::threadpool::fifo_scheduler, 
>boost::threadpool::static_size, boost::threadpool::resize_controller, 
>boost::threadpool::wait_for_all_tasks> >::run ()
>#11 0x0805d4bc in boost::function0<void, 
>std::allocator<boost::function_base> >::operator() ()
>#12 0x080f94de in thread_proxy ()
>#13 0x0817e8f4 in pthread_start_thread (arg=0x13966840) at manager.c:310
>#14 0x081ae73a in clone ()
>
>Any ideas what can be wrong? (It works very fine if the code runs with
>multiple threads on ONE CPU, but it starts failing if the threads are
>distributed among 2 or more CPUs) 


Best regards,
-- 
,yours Thomas Zangl, Bakk.rer.soc.oec. - 

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