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108 lines
2.2 KiB
C++
108 lines
2.2 KiB
C++
/* -*- C++ -*- */
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/* Copyright (C) 2002 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; either version 2 of the License, or
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(at your option) any later version.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifndef _SP_CACHE_H_
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#define _SP_CACHE_H_
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface /* gcc class implementation */
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#endif
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class sp_head;
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class sp_cache;
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/* Initialize the SP caching once at startup */
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void sp_cache_init();
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/* Clear the cache *cp and set *cp to NULL */
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void sp_cache_clear(sp_cache **cp);
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/* Insert an SP to cache. If 'cp' points to NULL, it's set to a new cache */
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void sp_cache_insert(sp_cache **cp, sp_head *sp);
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/* Lookup an SP in cache */
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sp_head *sp_cache_lookup(sp_cache **cp, sp_name *name);
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/* Remove an SP from cache. Returns true if something was removed */
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bool sp_cache_remove(sp_cache **cp, sp_name *name);
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/* Invalidate a cache */
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void sp_cache_invalidate();
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/*
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*
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* The cache class. Don't use this directly, use the C API above
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*
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*/
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class sp_cache
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{
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public:
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ulong version;
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sp_cache();
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~sp_cache();
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void
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init();
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void
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cleanup();
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inline void
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insert(sp_head *sp)
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{
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my_hash_insert(&m_hashtable, (const byte *)sp);
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}
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inline sp_head *
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lookup(char *name, uint namelen)
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{
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return (sp_head *)hash_search(&m_hashtable, (const byte *)name, namelen);
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}
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inline bool
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remove(char *name, uint namelen)
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{
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sp_head *sp= lookup(name, namelen);
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if (sp)
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{
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hash_delete(&m_hashtable, (byte *)sp);
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return TRUE;
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}
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return FALSE;
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}
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inline void
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remove_all()
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{
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cleanup();
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init();
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}
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private:
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HASH m_hashtable;
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}; // class sp_cache
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#endif /* _SP_CACHE_H_ */
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