[C++-sig] boost python and boost/thread.hpp

Jim Bosch talljimbo at gmail.com
Sun Feb 12 19:56:12 CET 2012

On 02/12/2012 01:34 PM, Guillaume Carbonneau wrote:
> Hi,
> I'm having compilation errors as soon as I give my classes member
> variables that come from the boost thread library.
> Wrapping those in shared_ptr seems to work.
> Any idea why? Is there a special wrapping directive I should give it to?

The problem is that boost::condition_variable doesn't have a copy 
constructor.  When you declare a class with Boost.Python, it assumes it 
can be returned by value (which requires a copy constructor).  The 
boost::condition_variable data member prevents the compiler from 
generating an implicit copy constructor.

You can solve this by instead using:


That tells Boost.Python not to assume this class can be returned by 
value.  If it makes sense to define an explicit copy constructor for 
your class, that will work too.


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