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/*
* include/proto/queue.h
* This file defines everything related to queues.
*
* Copyright (C) 2000-2012 Willy Tarreau - w@1wt.eu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _PROTO_QUEUE_H
#define _PROTO_QUEUE_H
#include <common/config.h>
#include <common/memory.h>
#include <common/mini-clist.h>
#include <types/proxy.h>
#include <types/queue.h>
#include <types/session.h>
#include <types/server.h>
#include <types/task.h>
#include <proto/backend.h>
extern struct pool_head *pool2_pendconn;
int init_pendconn();
struct session *pendconn_get_next_sess(struct server *srv, struct proxy *px);
struct pendconn *pendconn_add(struct session *sess);
void pendconn_free(struct pendconn *p);
void process_srv_queue(struct server *s);
unsigned int srv_dynamic_maxconn(const struct server *s);
int pendconn_redistribute(struct server *s);
int pendconn_grab_from_px(struct server *s);
/* Returns the first pending connection for server <s>, which may be NULL if
* nothing is pending.
*/
static inline struct pendconn *pendconn_from_srv(const struct server *s) {
if (!s->nbpend)
return NULL;
return LIST_ELEM(s->pendconns.n, struct pendconn *, list);
}
/* Returns the first pending connection for proxy <px>, which may be NULL if
* nothing is pending.
*/
static inline struct pendconn *pendconn_from_px(const struct proxy *px) {
if (!px->nbpend)
return NULL;
return LIST_ELEM(px->pendconns.n, struct pendconn *, list);
}
/* Returns 0 if all slots are full on a server, or 1 if there are slots available. */
static inline int server_has_room(const struct server *s) {
return !s->maxconn || s->cur_sess < srv_dynamic_maxconn(s);
}
/* returns 0 if nothing has to be done for server <s> regarding queued connections,
* and non-zero otherwise. If the server is down, we only check its own queue. Suited
* for and if/else usage.
*/
static inline int may_dequeue_tasks(const struct server *s, const struct proxy *p) {
return (s && (s->nbpend || (p->nbpend && srv_is_usable(s))) &&
(!s->maxconn || s->cur_sess < srv_dynamic_maxconn(s)));
}
#endif /* _PROTO_QUEUE_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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