summaryrefslogtreecommitdiffstats
path: root/lib/event.c
blob: 7f5454f87b757c90009c927c9c453a2850a40dfa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
/*
 *	BIRD Library -- Event Processing
 *
 *	(c) 1999 Martin Mares <mj@ucw.cz>
 *
 *	Can be freely distributed and used under the terms of the GNU GPL.
 */

#include "nest/bird.h"
#include "lib/event.h"

event_list global_event_list;

inline void
ev_postpone(event *e)
{
  if (e->n.next)
    {
      rem_node(&e->n);
      e->n.next = NULL;
    }
}

static void
ev_dump(resource *r)
{
  event *e = (event *) r;

  debug("(code %p, data %p, %s)\n",
	e->hook,
	e->data,
	e->n.next ? "scheduled" : "inactive");
}

static struct resclass ev_class = {
  "Event",
  0,
  (void (*)(resource *)) ev_postpone,
  ev_dump
};

event *
ev_new(pool *p)
{
  event *e = ralloc(p, &ev_class);

  e->hook = NULL;
  e->data = NULL;
  e->n.next = NULL;
  return e;
}

inline void
ev_run(event *e)
{
  e->hook(e->data);
  ev_postpone(e);
}

inline void
ev_enqueue(event_list *l, event *e)
{
  if (e->n.next)
    rem_node(&e->n);
  add_tail(l, &e->n);
}

void
ev_schedule(event *e)
{
  ev_enqueue(&global_event_list, e);
}

void
ev_run_list(event_list *l)
{
  for(;;)
    {
      node *n = HEAD(*l);
      event *e;
      if (!n->next)
	break;
      e = SKIP_BACK(event, n, n);
      ev_run(e);
    }
}