:cpp:func:`Comm::on_veto <simgrid::s4u::Comm::on_veto_cb>`
:cpp:func:`Comm::on_this_veto <simgrid::s4u::Comm::on_this_veto_cb>`
- :cpp:func:`Exec::on_start <simgrid::s4u::Exec::on_start_cb>`
:cpp:func:`Exec::on_this_start <simgrid::s4u::Exec::on_this_start_cb>`
:cpp:func:`Exec::on_completion <simgrid::s4u::Exec::on_completion_cb>`
:cpp:func:`Exec::on_this_completion <simgrid::s4u::Exec::on_this_completion_cb>`
:cpp:func:`Comm::on_veto <simgrid::s4u::Comm::on_veto_cb>`
:cpp:func:`Comm::on_this_veto <simgrid::s4u::Comm::on_this_veto_cb>`
- :cpp:func:`Exec::on_start <simgrid::s4u::Exec::on_start_cb>`
:cpp:func:`Exec::on_this_start <simgrid::s4u::Exec::on_this_start_cb>`
:cpp:func:`Exec::on_completion <simgrid::s4u::Exec::on_completion_cb>`
:cpp:func:`Exec::on_this_completion <simgrid::s4u::Exec::on_this_completion_cb>`