mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 17:51:53 +00:00
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
/*
|
|
* BIRD Library -- Obstacle Keeper
|
|
*
|
|
* (c) 2024 CZ.NIC, z.s.p.o.
|
|
* (c) 2024 Maria Matejka <mq@jmq.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_OBSTACLE_H_
|
|
#define _BIRD_OBSTACLE_H_
|
|
|
|
#include "lib/event.h"
|
|
#include "lib/locking.h"
|
|
#include "lib/string.h"
|
|
#include "lib/tlists.h"
|
|
|
|
#define TLIST_PREFIX obstacle
|
|
#define TLIST_TYPE struct obstacle
|
|
#define TLIST_ITEM n
|
|
|
|
struct obstacle {
|
|
TLIST_DEFAULT_NODE;
|
|
};
|
|
|
|
#define TLIST_WANT_ADD_TAIL
|
|
|
|
#include "lib/tlists.h"
|
|
|
|
struct obstacle_target {
|
|
DOMAIN(resource) dom;
|
|
TLIST_LIST(obstacle) obstacles;
|
|
struct callback *done;
|
|
};
|
|
|
|
static inline void
|
|
obstacle_put(struct obstacle_target *t, struct obstacle *o)
|
|
{
|
|
LOCK_DOMAIN(resource, t->dom);
|
|
obstacle_add_tail(&t->obstacles, o);
|
|
UNLOCK_DOMAIN(resource, t->dom);
|
|
}
|
|
|
|
static inline void
|
|
obstacle_remove(struct obstacle *o)
|
|
{
|
|
SKIP_BACK_DECLARE(struct obstacle_target, t, obstacles, obstacle_enlisted(o));
|
|
LOCK_DOMAIN(resource, t->dom);
|
|
obstacle_rem_node(&t->obstacles, o);
|
|
if (EMPTY_TLIST(obstacle, &t->obstacles))
|
|
callback_activate(t->done);
|
|
UNLOCK_DOMAIN(resource, t->dom);
|
|
}
|
|
|
|
static inline void
|
|
obstacle_target_init(struct obstacle_target *t, struct callback *done, pool *p, const char *fmt, ...)
|
|
{
|
|
t->dom = DOMAIN_NEW(resource);
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
DOMAIN_SETUP(resource, t->dom, mb_vsprintf(p, fmt, args), p);
|
|
va_end(args);
|
|
|
|
t->obstacles = (struct obstacle_list) {};
|
|
t->done = done;
|
|
}
|
|
|
|
static inline uint
|
|
obstacle_target_count(struct obstacle_target *t)
|
|
{
|
|
LOCK_DOMAIN(resource, t->dom);
|
|
uint len = TLIST_LENGTH(obstacle, &t->obstacles);
|
|
UNLOCK_DOMAIN(resource, t->dom);
|
|
return len;
|
|
}
|
|
|
|
#define OBSREF(_type) struct { _type *ref; struct obstacle o; }
|
|
|
|
#define OBSREF_SET(_ref, _val) ({ \
|
|
typeof (_ref) *_r = &(_ref); \
|
|
typeof (_val) _v = (_val); \
|
|
ASSERT_DIE(_r->ref == NULL); \
|
|
obstacle_put(&_v->obstacles, &_r->o); \
|
|
_r->ref = _v; \
|
|
})
|
|
|
|
#define OBSREF_CLEAR(_ref) ({ \
|
|
typeof (_ref) *_r = &(_ref); \
|
|
if (_r->ref) { \
|
|
obstacle_remove(&_r->o); \
|
|
_r->ref = NULL; \
|
|
}})
|
|
|
|
#define OBSREF_GET(_ref) ((_ref).ref)
|
|
|
|
#endif
|