Simulation involves doing what?

1. Loading the network description from a file, and parsing it.
2. Placing any input objects in their places, and connecting any external files/sockets to the appropriate nodes.
3. Initialising the timeout priority queue.
4. Initialising the each processor by running its initialiser with the stored parameters - timeouts may be set.
5. Create a queue containing all the objects that were marked as active
6. For each node that has content, 

activating a processor:
this happens in response to some stimulus, i.e. a signal on one of its nodes changing state (which may be an object arriving or leaving)





class proc {
  proc_class *class;
  node *nodes;
} proc;



typedef struct {
  int n_procs;
  proc *procs;

} net;

typedef struct {
  proc_class *class;
  node *nodes;
  group *groups;
  void *data;
} proc;

typedef struct {
  proc *peer;
  int peer_nd;
} node;

typedef struct {

} group;

typedef struct {
  int n_nodes;
  int n_groups;
  char **node_names;
  char **group_names;
  char **text_forms; // TODO index by which node & order?
  void (*push)(int nd, void *data);
  void (*pull)(int nd, void *data);
  void (*push_in_group)(int gd, int i, void *data);
  void (*pull_in_group)(int gd, int i, void *data);
} proc_class;