ng_sscfu_cust.h

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/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2001-2003
 *      Fraunhofer Institute for Open Communication Systems (FhG Fokus).
 *      All rights reserved.
 *
 * Author: Harti Brandt <harti@freebsd.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Customisation of the SSCFU code to ng_sscfu.
 *
 * $FreeBSD$
 */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <sys/callout.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <machine/stdarg.h>
 
/*
 * Allocate zeroed or non-zeroed memory of some size and cast it.
 * Return NULL on failure.
 */
#ifndef SSCFU_DEBUG
 
#define MEMINIT() \
        MALLOC_DECLARE(M_NG_SSCFU); \
        DECL_SIGQ_GET
 
#define MEMZALLOC(PTR, CAST, SIZE) \
        ((PTR) = (CAST)malloc((SIZE), M_NG_SSCFU, M_NOWAIT | M_ZERO))
#define MEMFREE(PTR) \
        free(PTR, M_NG_SSCFU)
 
#define SIG_ALLOC(PTR) \
        MEMZALLOC(PTR, struct sscfu_sig *, sizeof(struct sscfu_sig))
#define SIG_FREE(PTR) \
        MEMFREE(PTR)
 
#else
 
#define MEMINIT()                                                       \
        MALLOC_DEFINE(M_NG_SSCFU_INS, "sscfu_ins", "SSCFU instances");  \
        MALLOC_DEFINE(M_NG_SSCFU_SIG, "sscfu_sig", "SSCFU signals");    \
        DECL_SIGQ_GET
 
#define MEMZALLOC(PTR, CAST, SIZE)                                      \
        ((PTR) = (CAST)malloc((SIZE), M_NG_SSCFU_INS, M_NOWAIT | M_ZERO))
#define MEMFREE(PTR)                                                    \
        free(PTR, M_NG_SSCFU_INS)
 
#define SIG_ALLOC(PTR)                                                  \
        ((PTR) = malloc(sizeof(struct sscfu_sig),                       \
            M_NG_SSCFU_SIG, M_NOWAIT | M_ZERO))
#define SIG_FREE(PTR)                                                   \
        free(PTR, M_NG_SSCFU_SIG)
 
#endif
 
/*
 * Signal queues
 */
typedef TAILQ_ENTRY(sscfu_sig) sscfu_sigq_link_t;
typedef TAILQ_HEAD(sscfu_sigq, sscfu_sig) sscfu_sigq_head_t;
#define SIGQ_INIT(Q)            TAILQ_INIT(Q)
#define SIGQ_APPEND(Q, S)       TAILQ_INSERT_TAIL(Q, S, link)
 
#define SIGQ_GET(Q) ng_sscfu_sigq_get((Q))
 
#define DECL_SIGQ_GET                                                   \
static __inline struct sscfu_sig *                                      \
ng_sscfu_sigq_get(struct sscfu_sigq *q)                                 \
{                                                                       \
        struct sscfu_sig *s;                                            \
                                                                        \
        s = TAILQ_FIRST(q);                                             \
        if (s != NULL)                                                  \
                TAILQ_REMOVE(q, s, link);                               \
        return (s);                                                     \
}
 
#define SIGQ_CLEAR(Q)                                                   \
    do {                                                                \
        struct sscfu_sig *_s1, *_s2;                                    \
                                                                        \
        _s1 = TAILQ_FIRST(Q);                                           \
        while (_s1 != NULL) {                                           \
                _s2 = TAILQ_NEXT(_s1, link);                            \
                if (_s1->m)                                             \
                        MBUF_FREE(_s1->m);                              \
                SIG_FREE(_s1);                                          \
                _s1 = _s2;                                              \
        }                                                               \
        TAILQ_INIT(Q);                                                  \
    } while (0)
 
/*
 * Message buffers
 */
#define MBUF_FREE(M)    m_freem(M)
 
#ifdef SSCFU_DEBUG
#define ASSERT(S)       KASSERT(S, (#S))
#else
#define ASSERT(S)
#endif