[Boost-bugs] [Boost C++ Libraries] #9030: Should pass steppers by reference in integrate functions

Subject: [Boost-bugs] [Boost C++ Libraries] #9030: Should pass steppers by reference in integrate functions
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-08-22 05:53:43

#9030: Should pass steppers by reference in integrate functions
------------------------------+-------------------------
 Reporter:  anikin@…          |      Owner:  karsten
     Type:  Feature Requests  |     Status:  new
Milestone:  To Be Determined  |  Component:  odeint
  Version:  Boost 1.54.0      |   Severity:  Showstopper
 Keywords:  st                |
------------------------------+-------------------------
 The ''integrate'' family of functions takes steppers by value, but
 steppers like the most useful '''runge_kutta_dopri5''' may contain state
 which is not the best type to copy around. The worst happens if you try to
 use SSE-aligned vector for state type, e.g. Eigen::Array. Passing aligned
 struct by value cannot preserve the alignment and the program crashes.
 Which makes it impossible to use SSE vectorization with odeint. I think
 you need to change to passing steppers by reference or add
 odeint::unwrap_reference< Stepper > wherever steppers are passed, so that
 boost::ref could be used with them.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/9030>
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