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78e474b1a7
it was only truly used in one place, where it needed to compare its arguments before removing an entry from the cache. in the second place it was used, the comparison was redundant, it was only called to remove, not to compare. let's replace it with a function that just removes.
66 lines
2 KiB
C++
66 lines
2 KiB
C++
/* -*- C++ -*- */
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/* Copyright (c) 2002, 2012, 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 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 St, Fifth Floor, Boston, MA 02110-1335 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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/*
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Stored procedures/functions cache. This is used as follows:
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* Each thread has its own cache.
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* Each sp_head object is put into its thread cache before it is used, and
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then remains in the cache until deleted.
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*/
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class sp_head;
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class sp_cache;
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class Database_qualified_name;
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/*
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Cache usage scenarios:
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1. Application-wide init:
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sp_cache_init();
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2. SP execution in thread:
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2.1 While holding sp_head* pointers:
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// look up a routine in the cache (no checks if it is up to date or not)
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sp_cache_lookup();
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sp_cache_insert();
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sp_cache_invalidate();
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2.2 When not holding any sp_head* pointers:
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sp_cache_flush_obsolete();
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3. Before thread exit:
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sp_cache_clear();
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*/
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void sp_cache_init();
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void sp_cache_end();
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void sp_cache_clear(sp_cache **cp);
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void sp_cache_insert(sp_cache **cp, sp_head *sp);
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sp_head *sp_cache_lookup(sp_cache **cp, const Database_qualified_name *name);
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void sp_cache_invalidate();
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void sp_cache_remove(sp_cache **cp, sp_head **sp);
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ulong sp_cache_version();
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void sp_cache_enforce_limit(sp_cache *cp, ulong upper_limit_for_elements);
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#endif /* _SP_CACHE_H_ */
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