[ODE] Threads and ODE?

Jon Watte (ODE) hplus-ode at mindcontrol.org
Mon Jun 18 13:40:02 MST 2007

ODE is not thread safe. You can only manipulate objects when you know 
that the world collision/simulation isn't running.
ODE does not have any known bugs in memory management.
If you need to manipulate objects, then you should double-buffer the 
state, and pick up any requested changes before you call collide/step 
the next time in the simulation thread.


          / h+

Chris Spencer wrote:
> I'm unable to run a small ODE simulation for more than a couple
> minutes before ODE crashes with the error:
> ODE INTERNAL ERROR 2: invalid operation for locked space in dGeomMoved()
> Is this caused by ODE's buggy memory management, or is it something
> I'm doing? I'm manipulating ODE objects in a separate thread from the
> one running the ODE simulation. Could that be causing the error? What
> would be the best way to update a simulation from multiple threads
> without having to pause the simulation?

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