mirror of
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17b4f99928
This commit is based on the work of Michal Schorm, rebased on the
earliest MariaDB version.
Th command line used to generate this diff was:
find ./ -type f \
-exec sed -i -e 's/Foundation, Inc., 59 Temple Place, Suite 330, Boston, /Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, /g' {} \; \
-exec sed -i -e 's/Foundation, Inc. 59 Temple Place.* Suite 330, Boston, /Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, /g' {} \; \
-exec sed -i -e 's/MA.*.....-1307.*USA/MA 02110-1335 USA/g' {} \; \
-exec sed -i -e 's/Foundation, Inc., 59 Temple/Foundation, Inc., 51 Franklin/g' {} \; \
-exec sed -i -e 's/Place, Suite 330, Boston, MA.*02111-1307.*USA/Street, Fifth Floor, Boston, MA 02110-1335 USA/g' {} \; \
-exec sed -i -e 's/MA.*.....-1307/MA 02110-1335/g' {} \;
104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
/* Copyright (C) 2003-2007 MySQL AB
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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 as published by
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the Free Software Foundation; version 2 of the License.
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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 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 Street, Fifth Floor, Boston, MA 02110-1335 USA */
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/*
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Handling of multiple key caches
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The idea is to have a thread safe hash on the table name,
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with a default key cache value that is returned if the table name is not in
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the cache.
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*/
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#include "maria_def.h"
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#include "ma_pagecache.h"
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#include <hash.h>
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#include <m_string.h>
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#include "../../mysys/my_safehash.h"
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/*****************************************************************************
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Functions to handle the pagecache objects
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*****************************************************************************/
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/* Variable to store all key cache objects */
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static SAFE_HASH pagecache_hash;
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my_bool multi_pagecache_init(void)
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{
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return safe_hash_init(&pagecache_hash, 16, (uchar*) maria_pagecache);
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}
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void multi_pagecache_free(void)
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{
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safe_hash_free(&pagecache_hash);
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}
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/*
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Get a key cache to be used for a specific table.
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SYNOPSIS
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multi_pagecache_search()
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key key to find (usually table path)
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uint length Length of key.
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def Default value if no key cache
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NOTES
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This function is coded in such a way that we will return the
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default key cache even if one never called multi_pagecache_init.
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This will ensure that it works with old MyISAM clients.
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RETURN
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key cache to use
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*/
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PAGECACHE *multi_pagecache_search(uchar *key, uint length,
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PAGECACHE *def)
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{
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if (!pagecache_hash.hash.records)
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return def;
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return (PAGECACHE*) safe_hash_search(&pagecache_hash, key, length,
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(void*) def);
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}
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/*
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Assosiate a key cache with a key
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SYONOPSIS
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multi_pagecache_set()
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key key (path to table etc..)
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length Length of key
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pagecache cache to assococite with the table
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NOTES
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This can be used both to insert a new entry and change an existing
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entry
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*/
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my_bool multi_pagecache_set(const uchar *key, uint length,
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PAGECACHE *pagecache)
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{
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return safe_hash_set(&pagecache_hash, key, length, (uchar*) pagecache);
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}
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void multi_pagecache_change(PAGECACHE *old_data,
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PAGECACHE *new_data)
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{
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safe_hash_change(&pagecache_hash, (uchar*) old_data, (uchar*) new_data);
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}
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