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  1. /*
  2.  * Copyright (c) 2008 Jiri Svoboda
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - 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.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup trace
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <stdio.h>
  36. #include <stdlib.h>
  37. #include <ipc/ipc.h>
  38. #include <libadt/hash_table.h>
  39.  
  40. #include "proto.h"
  41.  
  42. #define SRV_PROTO_TABLE_CHAINS 32
  43. #define METHOD_OPER_TABLE_CHAINS 32
  44.  
  45. hash_table_t srv_proto;
  46.  
  47. typedef struct {
  48.     int srv;
  49.     proto_t *proto;
  50.     link_t link;
  51. } srv_proto_t;
  52.  
  53. typedef struct {
  54.     ipcarg_t method;
  55.     oper_t *oper;
  56.     link_t link;
  57. } method_oper_t;
  58.  
  59. static hash_index_t srv_proto_hash(unsigned long key[]);
  60. static int srv_proto_compare(unsigned long key[], hash_count_t keys,
  61.     link_t *item);
  62. static void srv_proto_remove_callback(link_t *item);
  63.  
  64. hash_table_operations_t srv_proto_ops = {
  65.     .hash = srv_proto_hash,
  66.     .compare = srv_proto_compare,
  67.     .remove_callback = srv_proto_remove_callback
  68. };
  69.  
  70. static hash_index_t method_oper_hash(unsigned long key[]);
  71. static int method_oper_compare(unsigned long key[], hash_count_t keys,
  72.     link_t *item);
  73. static void method_oper_remove_callback(link_t *item);
  74.  
  75. hash_table_operations_t method_oper_ops = {
  76.     .hash = method_oper_hash,
  77.     .compare = method_oper_compare,
  78.     .remove_callback = method_oper_remove_callback
  79. };
  80.  
  81. static hash_index_t srv_proto_hash(unsigned long key[])
  82. {
  83.     return key[0] % SRV_PROTO_TABLE_CHAINS;
  84. }
  85.  
  86. static int srv_proto_compare(unsigned long key[], hash_count_t keys,
  87.     link_t *item)
  88. {
  89.     srv_proto_t *sp;
  90.  
  91.     sp = hash_table_get_instance(item, srv_proto_t, link);
  92.  
  93.     return key[0] == sp->srv;
  94. }
  95.  
  96. static void srv_proto_remove_callback(link_t *item)
  97. {
  98. }
  99.  
  100. static hash_index_t method_oper_hash(unsigned long key[])
  101. {
  102.     return key[0] % METHOD_OPER_TABLE_CHAINS;
  103. }
  104.  
  105. static int method_oper_compare(unsigned long key[], hash_count_t keys,
  106.     link_t *item)
  107. {
  108.     method_oper_t *mo;
  109.  
  110.     mo = hash_table_get_instance(item, method_oper_t, link);
  111.  
  112.     return key[0] == mo->method;
  113. }
  114.  
  115. static void method_oper_remove_callback(link_t *item)
  116. {
  117. }
  118.  
  119.  
  120. void proto_init(void)
  121. {
  122.     hash_table_create(&srv_proto, SRV_PROTO_TABLE_CHAINS, 1,
  123.         &srv_proto_ops);
  124. }
  125.  
  126. void proto_cleanup(void)
  127. {
  128.     hash_table_destroy(&srv_proto);
  129. }
  130.  
  131. void proto_register(int srv, proto_t *proto)
  132. {
  133.     srv_proto_t *sp;
  134.     unsigned long key;
  135.  
  136.     sp = malloc(sizeof(srv_proto_t));
  137.     sp->srv = srv;
  138.     sp->proto = proto;
  139.     key = srv;
  140.  
  141.     hash_table_insert(&srv_proto, &key, &sp->link);
  142. }
  143.  
  144. proto_t *proto_get_by_srv(int srv)
  145. {
  146.     unsigned long key;
  147.     link_t *item;
  148.     srv_proto_t *sp;
  149.  
  150.     key = srv;
  151.     item = hash_table_find(&srv_proto, &key);
  152.     if (item == NULL) return NULL;
  153.  
  154.     sp = hash_table_get_instance(item, srv_proto_t, link);
  155.     return sp->proto;
  156. }
  157.  
  158. static void proto_struct_init(proto_t *proto, char *name)
  159. {
  160.     proto->name = name;
  161.     hash_table_create(&proto->method_oper, SRV_PROTO_TABLE_CHAINS, 1,
  162.         &method_oper_ops);
  163. }
  164.  
  165. proto_t *proto_new(char *name)
  166. {
  167.     proto_t *p;
  168.  
  169.     p = malloc(sizeof(proto_t));
  170.     proto_struct_init(p, name);
  171.  
  172.     return p;
  173. }
  174.  
  175. void proto_add_oper(proto_t *proto, int method, oper_t *oper)
  176. {
  177.     method_oper_t *mo;
  178.     unsigned long key;
  179.  
  180.     mo = malloc(sizeof(method_oper_t));
  181.     mo->method = method;
  182.     mo->oper = oper;
  183.     key = method;
  184.  
  185.     hash_table_insert(&proto->method_oper, &key, &mo->link);   
  186. }
  187.  
  188. oper_t *proto_get_oper(proto_t *proto, int method)
  189. {
  190.     unsigned long key;
  191.     link_t *item;
  192.     method_oper_t *mo;
  193.  
  194.     key = method;
  195.     item = hash_table_find(&proto->method_oper, &key);
  196.     if (item == NULL) return NULL;
  197.  
  198.     mo = hash_table_get_instance(item, method_oper_t, link);
  199.     return mo->oper;
  200. }
  201.  
  202. static void oper_struct_init(oper_t *oper, char *name)
  203. {
  204.     oper->name = name;
  205. }
  206.  
  207. oper_t *oper_new(char *name)
  208. {
  209.     oper_t *o;
  210.  
  211.     o = malloc(sizeof(oper_t));
  212.     oper_struct_init(o, name);
  213.  
  214.     return o;
  215. }
  216.  
  217. /** @}
  218.  */
  219.