99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
/*
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Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef NDBMEMCACHE_KEYPREFIX_H
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#define NDBMEMCACHE_KEYPREFIX_H
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#include <stdio.h>
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/***** This section defines data structures available to C. ***/
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/* The prefix_info_t is the compacted form of the parts of the
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KeyPrefix that must be available to C code.
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*/
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/* The value of 13 imposes a limit of 8,192 prefixes */
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#define KEY_PREFIX_BITS 13
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#define MAX_KEY_PREFIXES ( 1 << KEY_PREFIX_BITS )
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/* The value of 4 imposes a limit of 16 clusters */
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#define CLUSTER_ID_BITS 4
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#define MAX_CLUSTERS ( 1 << CLUSTER_ID_BITS )
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typedef struct ndb_prefix_bitfield {
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unsigned usable : 1;
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unsigned use_ndb : 1;
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unsigned _unused1 : 1;
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unsigned prefix_id : KEY_PREFIX_BITS;
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unsigned do_mc_read : 1;
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unsigned do_db_read : 1;
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unsigned do_mc_write : 1;
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unsigned do_db_write : 1;
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unsigned do_mc_delete : 1;
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unsigned do_db_delete : 1;
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unsigned do_db_flush : 1;
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unsigned has_cas_col : 1;
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unsigned has_flags_col : 1;
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unsigned has_expire_col : 1;
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unsigned has_math_col : 1;
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unsigned cluster_id : CLUSTER_ID_BITS;
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} prefix_info_t;
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/***** This section is available to C++ only. ***/
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#ifdef __cplusplus
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#include <sys/types.h>
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#include <string.h>
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#include <stdlib.h>
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#include "TableSpec.h"
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class KeyPrefix {
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public:
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/* public methods */
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KeyPrefix(const char *name);
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KeyPrefix(const KeyPrefix &);
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~KeyPrefix();
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int cmp(const char *key, int nkey);
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void dump(FILE *) const;
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/* public instance variables */
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TableSpec *table;
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prefix_info_t info;
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const char *prefix;
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const size_t prefix_len;
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};
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/**** Inline methods for KeyPrefix ****/
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inline int KeyPrefix::cmp(const char *key, int nkey) {
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return strncmp(prefix, key, prefix_len);
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}
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#endif
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#endif
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