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f827cf11be
This implementation will just automatically request channel reload/refeed when ROA change is detected. It may be sufficient for many uses; performance impact for big IXPs is unclear.
89 lines
1.9 KiB
C
89 lines
1.9 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/lists.h"
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struct listener {
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node sender_node;
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node receiver_node;
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void (*hook)(struct listener *who, void *data);
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void (*dump)(struct listener *who);
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void (*unsub)(struct listener *who);
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};
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static inline void subscribe(struct listener *who, list *sender, list *receiver)
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{
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ASSERT(!NODE_VALID(&(who->sender_node)));
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ASSERT(!NODE_VALID(&(who->receiver_node)));
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add_tail(sender, &(who->sender_node));
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add_tail(receiver, &(who->receiver_node));
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}
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static inline void unsubscribe(struct listener *who)
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{
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/* Allow multiple unsubscribe */
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if (!NODE_VALID(&(who->sender_node))
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&& !NODE_VALID(&(who->receiver_node)))
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return;
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ASSERT(NODE_VALID(&(who->sender_node))
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&& NODE_VALID(&(who->receiver_node)));
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rem_node(&(who->sender_node));
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rem_node(&(who->receiver_node));
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who->sender_node = who->receiver_node = (node) {};
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CALL(who->unsub, who);
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}
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static inline void unsubscribe_all(list *receiver)
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{
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struct listener *n;
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node *x, *y;
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WALK_LIST2_DELSAFE(n, x, y, *receiver, receiver_node)
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unsubscribe(n);
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}
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static inline void notify(list *sender, void *data)
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{
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struct listener *n;
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node *x, *y;
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WALK_LIST2_DELSAFE(n, x, y, *sender, sender_node)
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n->hook(n, data);
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}
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static inline void listeners_dump(list *sender, list *receiver)
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{
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ASSERT((!sender) || (!receiver));
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ASSERT(sender || receiver);
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struct listener *n;
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node *x;
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if (sender)
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WALK_LIST2(n, x, *sender, sender_node) {
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debug("\t\tNotifier: hook %p", n->hook);
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CALL(n->dump, n);
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debug("\n");
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}
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if (receiver)
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WALK_LIST2(n, x, *receiver, receiver_node) {
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debug("\t\tNotifier: hook %p", n->hook);
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CALL(n->dump, n);
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debug("\n");
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}
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}
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#endif
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