We can use std::shared_ptr and std::function instead now.
Lambdas are usually a better alternative to boost/std::bind. The
downside is the need to explicitly specify parameters completely. When
inlining callbacks entirely with lambdas, duplication of that
parameter list can be avoided.
Whenever possible, use std::make_shared to construct objects that are
tracked by std::shared_ptr.
Some objects need a std::weak_ptr during object destruction. For that
we have to use our own implementation of std::enable_shared_from_this,
with a matching creator function. The additional benefit is that we
can get rid of explicit static "create" methods by making that create
function a friend.
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
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