/usr/include/actionlib/enclosure_deleter.h is in libactionlib-dev 1.11.12-1.
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*
* Software License Agreement (BSD License)
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* Copyright (c) 2008, Willow Garage, Inc.
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* Author: Eitan Marder-Eppstein
*********************************************************************/
#include <boost/shared_ptr.hpp>
#ifndef ACTIONLIB__ENCLOSURE_DELETER_H_
#define ACTIONLIB__ENCLOSURE_DELETER_H_
namespace actionlib
{
/*
* This allows the creation of a shared pointer to a section
* of an already reference counted structure. For example,
* if in the following picture Enclosure is reference counted with
* a boost::shared_ptr and you want to return a boost::shared_ptr
* to the Member that is referenced counted along with Enclosure objects
*
* Enclosure --------------- <--- Already reference counted
* -----Member <------- A member of enclosure objects, eg. Enclosure.Member
*/
template<class Enclosure>
class EnclosureDeleter
{
public:
EnclosureDeleter(const boost::shared_ptr<Enclosure> & enc_ptr)
: enc_ptr_(enc_ptr) {}
template<class Member>
void operator()(Member *)
{
enc_ptr_.reset();
}
private:
boost::shared_ptr<Enclosure> enc_ptr_;
};
template<class Enclosure, class Member>
boost::shared_ptr<Member> share_member(boost::shared_ptr<Enclosure> enclosure, Member & member)
{
EnclosureDeleter<Enclosure> d(enclosure);
boost::shared_ptr<Member> p(&member, d);
return p;
}
} // namespace actionlib
#endif // ACTIONLIB__ENCLOSURE_DELETER_H_
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