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/*
* include/haproxy/vars.h
* Prototypes for variables.
*
* Copyright (C) 2015 Thierry FOURNIER <tfournier@arpalert.org>
*
* 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 _HAPROXY_VARS_H
#define _HAPROXY_VARS_H
#include <import/cebu64_tree.h>
#include <haproxy/api-t.h>
#include <haproxy/session-t.h>
#include <haproxy/stream-t.h>
#include <haproxy/thread.h>
#include <haproxy/vars-t.h>
extern struct vars proc_vars;
struct sample;
struct arg;
void vars_init_head(struct vars *vars, enum vars_scope scope);
void var_accounting_diff(struct vars *vars, struct session *sess, struct stream *strm, int size);
unsigned int var_clear(struct vars *vars, struct var *var, int force);
void vars_prune_per_sess(struct vars *vars);
int var_set(const struct var_desc *desc, struct sample *smp, uint flags);
int var_unset(const struct var_desc *desc, struct sample *smp);
int vars_get_by_name(const char *name, size_t len, struct sample *smp, const struct buffer *def);
int vars_set_by_name_ifexist(const char *name, size_t len, struct sample *smp);
int vars_set_by_name(const char *name, size_t len, struct sample *smp);
int vars_unset_by_name_ifexist(const char *name, size_t len, struct sample *smp);
int vars_get_by_desc(const struct var_desc *var_desc, struct sample *smp, const struct buffer *def);
int vars_check_arg(struct arg *arg, char **err);
/* locks the <vars> for writes if it's in a shared scope */
static inline void vars_wrlock(struct vars *vars)
{
if (vars->scope == SCOPE_PROC)
HA_RWLOCK_WRLOCK(VARS_LOCK, &vars->rwlock);
}
/* unlocks the <vars> for writes if it's in a shared scope */
static inline void vars_wrunlock(struct vars *vars)
{
if (vars->scope == SCOPE_PROC)
HA_RWLOCK_WRUNLOCK(VARS_LOCK, &vars->rwlock);
}
/* locks the <vars> for reads if it's in a shared scope */
static inline void vars_rdlock(struct vars *vars)
{
if (vars->scope == SCOPE_PROC)
HA_RWLOCK_RDLOCK(VARS_LOCK, &vars->rwlock);
}
/* unlocks the <vars> for reads if it's in a shared scope */
static inline void vars_rdunlock(struct vars *vars)
{
if (vars->scope == SCOPE_PROC)
HA_RWLOCK_RDUNLOCK(VARS_LOCK, &vars->rwlock);
}
/* This function free all the memory used by all the variables
* in the list.
*/
static inline void vars_prune(struct vars *vars, struct session *sess, struct stream *strm)
{
struct ceb_node *node;
struct var *var;
unsigned int size = 0;
int i;
for (i = 0; i < VAR_NAME_ROOTS; i++) {
while ((node = cebu64_first(&vars->name_root[i]))) {
var = container_of(node, struct var, node);
size += var_clear(vars, var, 1);
}
}
if (!size)
return;
var_accounting_diff(vars, sess, strm, -size);
}
#endif
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