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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 <adt/hash_table.h>
  39.  
  40. #include "trace.h"
  41. #include "proto.h"
  42.  
  43. #define SRV_PROTO_TABLE_CHAINS 32
  44. #define METHOD_OPER_TABLE_CHAINS 32
  45.  
  46. hash_table_t srv_proto;
  47.  
  48. typedef struct {
  49.     int srv;
  50.     proto_t *proto;
  51.     link_t link;
  52. } srv_proto_t;
  53.  
  54. typedef struct {
  55.     ipcarg_t method;
  56.     oper_t *oper;
  57.     link_t link;
  58. } method_oper_t;
  59.  
  60. static hash_index_t srv_proto_hash(unsigned long key[]);
  61. static int srv_proto_compare(unsigned long key[], hash_count_t keys,
  62.     link_t *item);
  63. static void srv_proto_remove_callback(link_t *item);
  64.  
  65. hash_table_operations_t srv_proto_ops = {
  66.     .hash = srv_proto_hash,
  67.     .compare = srv_proto_compare,
  68.     .remove_callback = srv_proto_remove_callback
  69. };
  70.  
  71. static hash_index_t method_oper_hash(unsigned long key[]);
  72. static int method_oper_compare(unsigned long key[], hash_count_t keys,
  73.     link_t *item);
  74. static void method_oper_remove_callback(link_t *item);
  75.  
  76. hash_table_operations_t method_oper_ops = {
  77.     .hash = method_oper_hash,
  78.     .compare = method_oper_compare,
  79.     .remove_callback = method_oper_remove_callback
  80. };
  81.  
  82. static hash_index_t srv_proto_hash(unsigned long key[])
  83. {
  84.     return key[0] % SRV_PROTO_TABLE_CHAINS;
  85. }
  86.  
  87. static int srv_proto_compare(unsigned long key[], hash_count_t keys,
  88.     link_t *item)
  89. {
  90.     srv_proto_t *sp;
  91.  
  92.     sp = hash_table_get_instance(item, srv_proto_t, link);
  93.  
  94.     return key[0] == sp->srv;
  95. }
  96.  
  97. static void srv_proto_remove_callback(link_t *item)
  98. {
  99. }
  100.  
  101. static hash_index_t method_oper_hash(unsigned long key[])
  102. {
  103.     return key[0] % METHOD_OPER_TABLE_CHAINS;
  104. }
  105.  
  106. static int method_oper_compare(unsigned long key[], hash_count_t keys,
  107.     link_t *item)
  108. {
  109.     method_oper_t *mo;
  110.  
  111.     mo = hash_table_get_instance(item, method_oper_t, link);
  112.  
  113.     return key[0] == mo->method;
  114. }
  115.  
  116. static void method_oper_remove_callback(link_t *item)
  117. {
  118. }
  119.  
  120.  
  121. void proto_init(void)
  122. {
  123.     hash_table_create(&srv_proto, SRV_PROTO_TABLE_CHAINS, 1,
  124.         &srv_proto_ops);
  125. }
  126.  
  127. void proto_cleanup(void)
  128. {
  129.     hash_table_destroy(&srv_proto);
  130. }
  131.  
  132. void proto_register(int srv, proto_t *proto)
  133. {
  134.     srv_proto_t *sp;
  135.     unsigned long key;
  136.  
  137.     sp = malloc(sizeof(srv_proto_t));
  138.     sp->srv = srv;
  139.     sp->proto = proto;
  140.     key = srv;
  141.  
  142.     hash_table_insert(&srv_proto, &key, &sp->link);
  143. }
  144.  
  145. proto_t *proto_get_by_srv(int srv)
  146. {
  147.     unsigned long key;
  148.     link_t *item;
  149.     srv_proto_t *sp;
  150.  
  151.     key = srv;
  152.     item = hash_table_find(&srv_proto, &key);
  153.     if (item == NULL) return NULL;
  154.  
  155.     sp = hash_table_get_instance(item, srv_proto_t, link);
  156.     return sp->proto;
  157. }
  158.  
  159. static void proto_struct_init(proto_t *proto, char *name)
  160. {
  161.     proto->name = name;
  162.     hash_table_create(&proto->method_oper, SRV_PROTO_TABLE_CHAINS, 1,
  163.         &method_oper_ops);
  164. }
  165.  
  166. proto_t *proto_new(char *name)
  167. {
  168.     proto_t *p;
  169.  
  170.     p = malloc(sizeof(proto_t));
  171.     proto_struct_init(p, name);
  172.  
  173.     return p;
  174. }
  175.  
  176. void proto_delete(proto_t *proto)
  177. {
  178.     free(proto);
  179. }
  180.  
  181. void proto_add_oper(proto_t *proto, int method, oper_t *oper)
  182. {
  183.     method_oper_t *mo;
  184.     unsigned long key;
  185.  
  186.     mo = malloc(sizeof(method_oper_t));
  187.     mo->method = method;
  188.     mo->oper = oper;
  189.     key = method;
  190.  
  191.     hash_table_insert(&proto->method_oper, &key, &mo->link);   
  192. }
  193.  
  194. oper_t *proto_get_oper(proto_t *proto, int method)
  195. {
  196.     unsigned long key;
  197.     link_t *item;
  198.     method_oper_t *mo;
  199.  
  200.     key = method;
  201.     item = hash_table_find(&proto->method_oper, &key);
  202.     if (item == NULL) return NULL;
  203.  
  204.     mo = hash_table_get_instance(item, method_oper_t, link);
  205.     return mo->oper;
  206. }
  207.  
  208. static void oper_struct_init(oper_t *oper, char *name)
  209. {
  210.     oper->name = name;
  211. }
  212.  
  213. oper_t *oper_new(char *name, int argc, val_type_t *arg_types,
  214.     val_type_t rv_type, int respc, val_type_t *resp_types)
  215. {
  216.     oper_t *o;
  217.     int i;
  218.  
  219.     o = malloc(sizeof(oper_t));
  220.     oper_struct_init(o, name);
  221.  
  222.     o->argc = argc;
  223.     for (i = 0; i < argc; i++)
  224.         o->arg_type[i] = arg_types[i];
  225.  
  226.     o->rv_type = rv_type;
  227.  
  228.     o->respc = respc;
  229.     for (i = 0; i < respc; i++)
  230.         o->resp_type[i] = resp_types[i];
  231.  
  232.     return o;
  233. }
  234.  
  235. /** @}
  236.  */
  237.