0d70292d88
for processing in next event cycle. This can be used to prevent background actions (hint: user commands) from hogging the CPU for too long time.
85 lines
1.1 KiB
C
85 lines
1.1 KiB
C
/*
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* BIRD Library -- Event Processing
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*
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* (c) 1999 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#include "nest/bird.h"
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#include "lib/event.h"
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event_list global_event_list;
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inline void
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ev_postpone(event *e)
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{
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if (e->n.next)
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{
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rem_node(&e->n);
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e->n.next = NULL;
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}
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}
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static void
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ev_dump(resource *r)
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{
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event *e = (event *) r;
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debug("(code %p, data %p, %s)\n",
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e->hook,
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e->data,
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e->n.next ? "scheduled" : "inactive");
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}
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static struct resclass ev_class = {
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"Event",
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sizeof(event),
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(void (*)(resource *)) ev_postpone,
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ev_dump
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};
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event *
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ev_new(pool *p)
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{
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event *e = ralloc(p, &ev_class);
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e->hook = NULL;
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e->data = NULL;
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e->n.next = NULL;
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return e;
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}
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inline void
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ev_run(event *e)
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{
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if (!e->hook(e->data))
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ev_postpone(e);
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}
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inline void
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ev_enqueue(event_list *l, event *e)
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{
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if (e->n.next)
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rem_node(&e->n);
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add_tail(l, &e->n);
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}
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void
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ev_schedule(event *e)
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{
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ev_enqueue(&global_event_list, e);
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}
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void
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ev_run_list(event_list *l)
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{
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node *n, *p;
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WALK_LIST_DELSAFE(n, p, *l)
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{
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event *e = SKIP_BACK(event, n, n);
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ev_run(e);
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}
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}
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