rte_tailq.h

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/* 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 <stdio.h>
#include <rte_debug.h>

struct rte_tailq_entry {
    RTE_TAILQ_ENTRY(rte_tailq_entry) next; 
    void *data; 
};
RTE_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;
    RTE_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) __extension__ ({ \
    struct rte_tailq_head *head = rte_eal_tailq_lookup(name); \
    head == NULL ? NULL : RTE_TAILQ_CAST(head, 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) \
{ \
    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.*/
#define RTE_TAILQ_FOREACH_SAFE(var, head, field, tvar) \
    for ((var) = RTE_TAILQ_FIRST((head)); \
        (var) && ((tvar) = RTE_TAILQ_NEXT((var), field), 1); \
        (var) = (tvar))

#ifdef __cplusplus
}
#endif

#endif /* _RTE_TAILQ_H_ */