sys/netgraph7/atm/sscfu/ng_sscfu_cust.h

   1 /*-
   2  * Copyright (c) 2001-2003
   3  *      Fraunhofer Institute for Open Communication Systems (FhG Fokus).
   4  *      All rights reserved.
   5  *
   6  * Author: Harti Brandt <harti@freebsd.org>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * Customisation of the SSCFU code to ng_sscfu.
  30  *
  31  * $FreeBSD: src/sys/netgraph/atm/sscfu/ng_sscfu_cust.h,v 1.2 2005/01/07 01:45:41 imp Exp $
  32  */
  33 #include <sys/param.h>
  34 #include <sys/types.h>
  35 #include <sys/kernel.h>
  36 #include <sys/mbuf.h>
  37 #include <sys/queue.h>
  38 #include <sys/callout.h>
  39 #include <sys/systm.h>
  40 #include <sys/malloc.h>
  41 #include <machine/stdarg.h>
  42
  43 /*
  44  * Allocate zeroed or non-zeroed memory of some size and cast it.
  45  * Return NULL on failure.
  46  */
  47 #ifndef SSCFU_DEBUG
  48
  49 #define MEMINIT() \
  50         MALLOC_DECLARE(M_NG_SSCFU); \
  51         DECL_SIGQ_GET
  52
  53 #define MEMZALLOC(PTR, CAST, SIZE) \
  54         ((PTR) = (CAST)malloc((SIZE), M_NG_SSCFU, M_NOWAIT | M_ZERO))
  55 #define MEMFREE(PTR) \
  56         free(PTR, M_NG_SSCFU)
  57
  58 #define SIG_ALLOC(PTR) \
  59         MEMZALLOC(PTR, struct sscfu_sig *, sizeof(struct sscfu_sig))
  60 #define SIG_FREE(PTR) \
  61         MEMFREE(PTR)
  62
  63 #else
  64
  65 #define MEMINIT()                                                       \
  66         MALLOC_DEFINE(M_NG_SSCFU_INS, "sscfu_ins", "SSCFU instances");  \
  67         MALLOC_DEFINE(M_NG_SSCFU_SIG, "sscfu_sig", "SSCFU signals");    \
  68         DECL_SIGQ_GET
  69
  70 #define MEMZALLOC(PTR, CAST, SIZE)                                      \
  71         ((PTR) = (CAST)malloc((SIZE), M_NG_SSCFU_INS, M_NOWAIT | M_ZERO))
  72 #define MEMFREE(PTR)                                                    \
  73         FREE(PTR, M_NG_SSCFU_INS)
  74
  75 #define SIG_ALLOC(PTR)                                                  \
  76         ((PTR) = malloc(sizeof(struct sscfu_sig),                       \
  77             M_NG_SSCFU_SIG, M_NOWAIT | M_ZERO))
  78 #define SIG_FREE(PTR)                                                   \
  79         FREE(PTR, M_NG_SSCFU_SIG)
  80
  81 #endif
  82
  83
  84 /*
  85  * Signal queues
  86  */
  87 typedef TAILQ_ENTRY(sscfu_sig) sscfu_sigq_link_t;
  88 typedef TAILQ_HEAD(sscfu_sigq, sscfu_sig) sscfu_sigq_head_t;
  89 #define SIGQ_INIT(Q)            TAILQ_INIT(Q)
  90 #define SIGQ_APPEND(Q, S)       TAILQ_INSERT_TAIL(Q, S, link)
  91
  92 #define SIGQ_GET(Q) ng_sscfu_sigq_get((Q))
  93
  94 #define DECL_SIGQ_GET                                                   \
  95 static __inline struct sscfu_sig *                                      \
  96 ng_sscfu_sigq_get(struct sscfu_sigq *q)                                 \
  97 {                                                                       \
  98         struct sscfu_sig *s;                                            \
  99                                                                         \
 100         s = TAILQ_FIRST(q);                                             \
 101         if (s != NULL)                                                  \
 102                 TAILQ_REMOVE(q, s, link);                               \
 103         return (s);                                                     \
 104 }
 105
 106 #define SIGQ_CLEAR(Q)                                                   \
 107     do {                                                                \
 108         struct sscfu_sig *_s1, *_s2;                                    \
 109                                                                         \
 110         _s1 = TAILQ_FIRST(Q);                                           \
 111         while (_s1 != NULL) {                                           \
 112                 _s2 = TAILQ_NEXT(_s1, link);                            \
 113                 if (_s1->m)                                             \
 114                         MBUF_FREE(_s1->m);                              \
 115                 SIG_FREE(_s1);                                          \
 116                 _s1 = _s2;                                              \
 117         }                                                               \
 118         TAILQ_INIT(Q);                                                  \
 119     } while (0)
 120
 121
 122 /*
 123  * Message buffers
 124  */
 125 #define MBUF_FREE(M)    m_freem(M)
 126
 127 #ifdef SSCFU_DEBUG
 128 #define ASSERT(S)       KASSERT(S, (#S))
 129 #else
 130 #define ASSERT(S)
 131 #endif