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/* -*- C++ -*- */
/* Copyright (c) 2002, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License, version 2.0, for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#ifndef _SP_CACHE_H_
#define _SP_CACHE_H_
#include <sys/types.h>
#include "my_inttypes.h"
/*
Stored procedures/functions cache. This is used as follows:
* Each thread has its own cache.
* Each sp_head object is put into its thread cache before it is used, and
then remains in the cache until deleted.
*/
class sp_cache;
class sp_head;
class sp_name;
/*
Cache usage scenarios:
1. SP execution in thread:
1.1 While holding sp_head* pointers:
// look up a routine in the cache (no checks if it is up to date or not)
sp_cache_lookup();
sp_cache_insert();
sp_cache_invalidate();
1.2 When not holding any sp_head* pointers:
sp_cache_flush_obsolete();
2. Before thread exit:
sp_cache_clear();
*/
void sp_cache_clear(sp_cache **cp);
void sp_cache_insert(sp_cache **cp, sp_head *sp);
sp_head *sp_cache_lookup(sp_cache **cp, const sp_name *name);
void sp_cache_invalidate();
void sp_cache_flush_obsolete(sp_cache **cp, sp_head **sp);
int64 sp_cache_version();
void sp_cache_enforce_limit(sp_cache *cp, ulong upper_limit_for_elements);
#endif /* _SP_CACHE_H_ */
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