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MEDIUM: protocol: use a family array to index the protocol handlers

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Instead of walking over a list, we now have a direct mapping between
protocol families and their respective handlers. This will allow fast
lookups.
This commit is contained in:
Willy Tarreau 2015-02-20 16:53:25 +01:00 committed by Willy Tarreau
parent 2e05a8c742
commit b550d009ca
2 changed files with 14 additions and 13 deletions
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10
include/proto/protocol.h
View File

@ -22,8 +22,11 @@
#ifndef _PROTO_PROTOCOL_H
#define _PROTO_PROTOCOL_H
#include <sys/socket.h>
#include <types/protocol.h>
extern struct protocol *__protocol_by_family[AF_MAX];
/* Registers the protocol <proto> */
void protocol_register(struct protocol *proto);
@ -51,7 +54,12 @@ int protocol_unbind_all(void);
int protocol_enable_all(void);
/* returns the protocol associated to family <family> or NULL if not found */
struct protocol *protocol_by_family(int family);
static inline struct protocol *protocol_by_family(int family)
{
if (family >= 0 && family < AF_MAX)
return __protocol_by_family[family];
return NULL;
}
#endif /* _PROTO_PROTOCOL_H */

17
src/protocol.c
View File

@ -10,6 +10,8 @@
*
*/
#include <sys/socket.h>
#include <common/config.h>
#include <common/errors.h>
#include <common/mini-clist.h>
@ -19,11 +21,14 @@
/* List head of all registered protocols */
static struct list protocols = LIST_HEAD_INIT(protocols);
struct protocol *__protocol_by_family[AF_MAX] = { };
/* Registers the protocol <proto> */
void protocol_register(struct protocol *proto)
{
LIST_ADDQ(&protocols, &proto->list);
if (proto->sock_domain >= 0 && proto->sock_domain < AF_MAX)
__protocol_by_family[proto->sock_domain] = proto;
}
/* Unregisters the protocol <proto>. Note that all listeners must have
@ -109,18 +114,6 @@ int protocol_disable_all(void)
return err;
}
/* Returns the protocol handler for socket family <family> or NULL if not found */
struct protocol *protocol_by_family(int family)
{
struct protocol *proto;
list_for_each_entry(proto, &protocols, list) {
if (proto->sock_domain == family)
return proto;
}
return NULL;
}
/*
* Local variables:
* c-indent-level: 8