simgrid::xbt::signal<void(Link&)> Link::on_state_change;
simgrid::xbt::signal<void(Link&)> Link::on_bandwidth_change;
simgrid::xbt::signal<void(kernel::resource::NetworkAction*, Host* src, Host* dst)> Link::on_communicate;
simgrid::xbt::signal<void(Link&)> Link::on_state_change;
simgrid::xbt::signal<void(Link&)> Link::on_bandwidth_change;
simgrid::xbt::signal<void(kernel::resource::NetworkAction*, Host* src, Host* dst)> Link::on_communicate;