ovsdb/table.h

   1 /* Copyright (c) 2009, 2010, 2011 Nicira, Inc.
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #ifndef OVSDB_TABLE_H
  17 #define OVSDB_TABLE_H 1
  18
  19 #include <stdbool.h>
  20 #include "compiler.h"
  21 #include "openvswitch/hmap.h"
  22 #include "openvswitch/shash.h"
  23
  24 struct json;
  25 struct uuid;
  26
  27 /* Schema for a database table. */
  28 struct ovsdb_table_schema {
  29     char *name;
  30     bool mutable;
  31     bool is_root;               /* Part of garbage collection root set? */
  32     unsigned int max_rows;      /* Maximum number of rows. */
  33     struct shash columns;       /* Contains "struct ovsdb_column *"s. */
  34     struct ovsdb_column_set *indexes;
  35     size_t n_indexes;
  36 };
  37
  38 struct ovsdb_table_schema *ovsdb_table_schema_create(
  39     const char *name, bool mutable, unsigned int max_rows, bool is_root);
  40 struct ovsdb_table_schema *ovsdb_table_schema_clone(
  41     const struct ovsdb_table_schema *);
  42 void ovsdb_table_schema_destroy(struct ovsdb_table_schema *);
  43
  44 struct ovsdb_error *ovsdb_table_schema_from_json(const struct json *,
  45                                                  const char *name,
  46                                                  struct ovsdb_table_schema **)
  47     OVS_WARN_UNUSED_RESULT;
  48 struct json *ovsdb_table_schema_to_json(const struct ovsdb_table_schema *,
  49                                         bool default_is_root);
  50
  51 const struct ovsdb_column *ovsdb_table_schema_get_column(
  52     const struct ovsdb_table_schema *, const char *name);
  53 \f
  54 /* Database table. */
  55
  56 struct ovsdb_table {
  57     struct ovsdb_table_schema *schema;
  58     struct ovsdb_txn_table *txn_table; /* Only if table is in a transaction. */
  59     struct hmap rows;           /* Contains "struct ovsdb_row"s. */
  60
  61     /* An array of schema->n_indexes hmaps, each of which contains "struct
  62      * ovsdb_row"s.  Each of the hmap_nodes in indexes[i] are at index 'i' at
  63      * the end of struct ovsdb_row, following the 'fields' member. */
  64     struct hmap *indexes;
  65 };
  66
  67 struct ovsdb_table *ovsdb_table_create(struct ovsdb_table_schema *);
  68 void ovsdb_table_destroy(struct ovsdb_table *);
  69
  70 const struct ovsdb_row *ovsdb_table_get_row(const struct ovsdb_table *,
  71                                             const struct uuid *);
  72
  73 #endif /* ovsdb/table.h */