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/*
* BIRD Library -- Event Processing
*
* (c) 1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_EVENT_H_
#define _BIRD_EVENT_H_
#include "lib/resource.h"
#include "lib/locking.h"
#include <stdatomic.h>
DEFINE_DOMAIN(event);
DEFINE_DOMAIN(cork);
typedef struct event {
resource r;
void (*hook)(void *);
void *data;
node n; /* Internal link */
struct event_list *list; /* List where this event is put in */
struct event_cork *cork; /* Event execution limiter */
node cork_node;
} event;
typedef struct event_list {
list events;
pool *pool;
struct birdloop *loop;
DOMAIN(event) lock;
} event_list;
struct event_cork {
DOMAIN(cork) lock;
u32 count;
list events;
};
extern event_list global_event_list;
extern event_list global_work_list;
event *ev_new(pool *);
void ev_run(event *);
static inline void ev_init_list(event_list *el, struct birdloop *loop, const char *name)
{
init_list(&el->events);
el->loop = loop;
el->lock = DOMAIN_NEW(event, name);
}
static inline void ev_init_cork(struct event_cork *ec, const char *name)
{
init_list(&ec->events);
ec->lock = DOMAIN_NEW(cork, name);
ec->count = 0;
};
void ev_send(event_list *, event *);
#define ev_send_loop(l, e) ev_send(birdloop_event_list((l)), (e))
#define ev_schedule(e) ({ ASSERT_THE_BIRD_LOCKED; if (!ev_active((e))) ev_send(&global_event_list, (e)); })
#define ev_schedule_work(e) ({ ASSERT_THE_BIRD_LOCKED; if (!ev_active((e))) ev_send(&global_work_list, (e)); })
void ev_postpone(event *);
int ev_run_list(event_list *);
int ev_run_list_limited(event_list *, uint);
#define LEGACY_EVENT_LIST(l) (((l) == &global_event_list) || ((l) == &global_work_list))
void ev_cork(struct event_cork *);
void ev_uncork(struct event_cork *);
static inline u32 ev_corked(struct event_cork *ec)
{
if (!ec)
return 0;
LOCK_DOMAIN(cork, ec->lock);
u32 out = ec->count;
UNLOCK_DOMAIN(cork, ec->lock);
return out;
}
_Bool birdloop_inside(struct birdloop *loop);
static inline int
ev_active(event *e)
{
if (e->list == NULL)
return 0;
ASSERT_DIE(birdloop_inside(e->list->loop));
return enlisted(&e->n);
}
static inline event*
ev_new_init(pool *p, void (*hook)(void *), void *data)
{
event *e = ev_new(p);
e->hook = hook;
e->data = data;
return e;
}
#endif
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