From a175314c3e5827eb193872241446f2f8f5c9d33c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 20:07:14 +0200 Subject: Adding upstream version 1:10.5.12. Signed-off-by: Daniel Baumann --- sql/sp_cache.h | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 sql/sp_cache.h (limited to 'sql/sp_cache.h') diff --git a/sql/sp_cache.h b/sql/sp_cache.h new file mode 100644 index 00000000..7506edff --- /dev/null +++ b/sql/sp_cache.h @@ -0,0 +1,66 @@ +/* -*- C++ -*- */ +/* Copyright (c) 2002, 2012, 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 as published by + the Free Software Foundation; version 2 of the License. + + 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 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 02110-1335 USA */ + +#ifndef _SP_CACHE_H_ +#define _SP_CACHE_H_ + +#ifdef USE_PRAGMA_INTERFACE +#pragma interface /* gcc class implementation */ +#endif + +/* + 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_head; +class sp_cache; +class Database_qualified_name; + +/* + Cache usage scenarios: + 1. Application-wide init: + sp_cache_init(); + + 2. SP execution in thread: + 2.1 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(); + + 2.2 When not holding any sp_head* pointers: + sp_cache_flush_obsolete(); + + 3. Before thread exit: + sp_cache_clear(); +*/ + +void sp_cache_init(); +void sp_cache_end(); +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 Database_qualified_name *name); +void sp_cache_invalidate(); +void sp_cache_flush_obsolete(sp_cache **cp, sp_head **sp); +ulong sp_cache_version(); +void sp_cache_enforce_limit(sp_cache *cp, ulong upper_limit_for_elements); + +#endif /* _SP_CACHE_H_ */ -- cgit v1.2.3