rte_tailq.h

Go to the documentation of this file.

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#ifndef _RTE_TAILQ_H_
#define _RTE_TAILQ_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <sys/queue.h>
#include <stdio.h>
#include <rte_debug.h>

struct rte_tailq_entry {
        TAILQ_ENTRY(rte_tailq_entry) next; 
        void *data; 
};
TAILQ_HEAD(rte_tailq_entry_head, rte_tailq_entry);

#define RTE_TAILQ_NAMESIZE 32

struct rte_tailq_head {
        struct rte_tailq_entry_head tailq_head; 
        char name[RTE_TAILQ_NAMESIZE];
};

struct rte_tailq_elem {
        struct rte_tailq_head *head;
        TAILQ_ENTRY(rte_tailq_elem) next;
        const char name[RTE_TAILQ_NAMESIZE];
};

#define RTE_TAILQ_CAST(tailq_entry, struct_name) \
        (struct struct_name *)&(tailq_entry)->tailq_head

#define RTE_TAILQ_LOOKUP(name, struct_name) \
        RTE_TAILQ_CAST(rte_eal_tailq_lookup(name), struct_name)

void rte_dump_tailq(FILE *f);

struct rte_tailq_head *rte_eal_tailq_lookup(const char *name);

int rte_eal_tailq_register(struct rte_tailq_elem *t);

#define EAL_REGISTER_TAILQ(t) \
RTE_INIT(tailqinitfn_ ##t); \
static void tailqinitfn_ ##t(void) \
{ \
        if (rte_eal_tailq_register(&t) < 0) \
                rte_panic("Cannot initialize tailq: %s\n", t.name); \
}

/* This macro permits both remove and free var within the loop safely.*/
#ifndef TAILQ_FOREACH_SAFE
#define TAILQ_FOREACH_SAFE(var, head, field, tvar)              \
        for ((var) = TAILQ_FIRST((head));                       \
            (var) && ((tvar) = TAILQ_NEXT((var), field), 1);    \
            (var) = (tvar))
#endif

#ifdef __cplusplus
}
#endif

#endif /* _RTE_TAILQ_H_ */