| Re: [eigen] question on alignment |
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On 10.10.2012 10:32, Sylvain Pointeau wrote:
do we have to propagate the EIGEN_MAKE_ALIGNED_OPERATOR_NEW to every
class using a class containing an EIGEN class?
Yes, if that class needs to be aligned (basically, if its size is a
multiple of 16) and you want to be able to allocate your class using
new. Another case where you don't need it is when you inherit from a
class which already has EMAON.
O.t.o.h. it can never hurt to add redundant EMAONs.
additionally for this:
class AList
{
...
std::vector<A,Eigen::aligned_allocator<A> > mylist
...
public:
EIGEN_MAKE_ALIGNED_OPERATOR_NEW <---- do I have to use it here?
}
No, AList does not contain actual Eigen objects. The std::vector only
consists of some pointers (which have to point to aligned addresses, so
the Eigen::aligned_allocator is indeed necessary).
Christoph
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Dipl.-Inf. Christoph Hertzberg
Cartesium 0.049
Universität Bremen
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