You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
2.2 KiB
68 lines
2.2 KiB
/* -*- C++ -*- */
|
|
/* Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
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 also distributed 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 included with MySQL.
|
|
|
|
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, 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_ */
|
|
|