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64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/*
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* BIRD Internet Routing Daemon -- Notificators and Listeners
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*
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* (c) 2019 Maria Matejka <mq@jmq.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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#ifndef _BIRD_NOTIFY_H_
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#define _BIRD_NOTIFY_H_
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#include "lib/resource.h"
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#include "lib/tlists.h"
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#define LISTENER(stype) struct listener__##stype
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#define LISTENER_DEF(stype) \
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TLIST_DEF(listener__##stype); \
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LISTENER(stype) { \
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resource r; \
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TNODE(listener__##stype) n; \
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void *self; \
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void (*notify)(void *self, const stype *data); \
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}; \
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extern struct resclass LISTENER_CLASS(stype)
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#define LISTENERS(stype) TLIST(listener__##stype)
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#define LISTENER_CLASS(stype) listener_class__##stype
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#define LISTENER_CLASS_DEF(stype) static void listener_unnotify__##stype(resource *r) { \
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debug("in: listener_unnotify__" #stype " %p\n", r); \
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LISTENER(stype) *L = (LISTENER(stype) *) r; \
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TREM_NODE(listener__##stype, L->n); \
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debug("out: listener_unnotify__" #stype " %p\n", r); \
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} \
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struct resclass LISTENER_CLASS(stype) = { \
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.name = "Listener " #stype, \
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.size = sizeof(LISTENER(stype)), \
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.free = listener_unnotify__##stype, \
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}
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#define INIT_LISTENERS(stype, sender) INIT_TLIST(listener__##stype, sender)
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#define SUBSCRIBE(stype, pool, sender, _self, _notify) ({ \
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LISTENER(stype) *L = ralloc(pool, &listener_class__##stype); \
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L->notify = _notify; \
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L->self = _self; \
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L->n.self = L; \
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TADD_TAIL(listener__##stype, sender, L->n); \
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L; \
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})
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#define UNSUBSCRIBE(stype, listener) do { \
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LISTENER(stype) *L = listener; \
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rfree(L); \
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} while (0)
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#define NOTIFY(stype, sender, data) do { \
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const stype *_d = data; \
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WALK_TLIST_DELSAFE(listener__##stype, L, sender) \
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L->self->notify(L->self->self, _d); \
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} while (0)
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#endif
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