contrib/ngatm/libngatm/sscfucust.h

   1 /*
   2  * Copyright (c) 2001-2003
   3  *      Fraunhofer Institute for Open Communication Systems (FhG Fokus).
   4  *      All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * Author: Hartmut Brandt <harti@freebsd.org>
  28  *
  29  * $Begemot: libunimsg/libngatm/sscfucust.h,v 1.4 2004/07/08 08:21:40 brandt Exp $
  30  *
  31  * Customisation of the SSCFU code for the user space library.
  32  */
  33 #include <sys/types.h>
  34 #include <sys/queue.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <errno.h>
  39 #ifdef SSCFU_DEBUG
  40 #include <assert.h>
  41 #endif
  42 #include <netnatm/unimsg.h>
  43
  44 /*
  45  * Allocate zeroed or non-zeroed memory of some size and cast it.
  46  * Return NULL on failure.
  47  */
  48 #define MEMINIT()
  49
  50 #define MEMZALLOC(PTR,CAST,SIZE) do {                           \
  51         void *_m = malloc(SIZE);                                \
  52         if (_m != NULL)                                         \
  53                 bzero(_m, SIZE);                                \
  54         (PTR) = (CAST)_m;                                       \
  55 } while(0)
  56
  57 #define MEMFREE(PTR) \
  58         free(PTR)
  59
  60 #define SIG_ALLOC(PTR) \
  61         MEMZALLOC(PTR, struct sscfu_sig *, sizeof(struct sscfu_sig))
  62 #define SIG_FREE(PTR) \
  63         MEMFREE(PTR)
  64
  65 /*
  66  * Signal queues
  67  */
  68 typedef TAILQ_ENTRY(sscfu_sig) sscfu_sigq_link_t;
  69 typedef TAILQ_HEAD(sscfu_sigq, sscfu_sig) sscfu_sigq_head_t;
  70 #define SIGQ_INIT(Q)            TAILQ_INIT(Q)
  71 #define SIGQ_APPEND(Q,S)        TAILQ_INSERT_TAIL(Q, S, link)
  72 #define SIGQ_GET(Q)                                                     \
  73     ({                                                                  \
  74         struct sscfu_sig *_s = NULL;                                    \
  75                                                                         \
  76         if(!TAILQ_EMPTY(Q)) {                                           \
  77                 _s = TAILQ_FIRST(Q);                                    \
  78                 TAILQ_REMOVE(Q, _s, link);                              \
  79         }                                                               \
  80         _s;                                                             \
  81     })
  82
  83 #define SIGQ_CLEAR(Q)                                                   \
  84     do {                                                                \
  85         struct sscfu_sig *_s1, *_s2;                                    \
  86                                                                         \
  87         _s1 = TAILQ_FIRST(Q);                                           \
  88         while(_s1 != NULL) {                                            \
  89                 _s2 = TAILQ_NEXT(_s1, link);                            \
  90                 if(_s1->m)                                              \
  91                         MBUF_FREE(_s1->m);                              \
  92                 SIG_FREE(_s1);                                          \
  93                 _s1 = _s2;                                              \
  94         }                                                               \
  95         TAILQ_INIT(Q);                                                  \
  96     } while(0)
  97
  98
  99 /*
 100  * Message buffers
 101  */
 102 #define MBUF_FREE(M)    uni_msg_destroy(M)
 103
 104 #ifdef SSCFU_DEBUG
 105 #define ASSERT(S)       assert(S)
 106 #else
 107 #define ASSERT(S)
 108 #endif