I am confused as to what this is doing:

#define AIR_LP 1

tw_lptype airport_lps[] = {
  {
    AIR_LP, sizeof(Airport_State),
    (init_f) Airport_StartUp,
    (event_f) Airport_EventHandler,
    (revent_f) Airport_RC_EventHandler,
    (final_f) Airport_Statistics_CollectStats,
    (statecp_f) NULL
  },
  { 0 },
};

and

struct tw_lptype
{
  init_f init;
  event_f event;
  revent_f revent;
  final_f final;
  map_f map;
  size_t state_sz;
};

I guess I am getting confused by the first two variables in the structure declaration AIR_LP and sizeof(Airport_state), I understand what all the rest is doing, so if someone can just give me some info as to what those two parts are going to that would be great.

• c++
• c

It's difficult to answer your question without knowing the types involved. The problem you are having is that your initialization has 7 attributes to the structure when your structure has 6. The AIR_LP, sizeof(Airport_State), are separate elements unlike the rest of the initialization which consists of a type cast followed by a value.