mirror of
https://github.com/samba-team/samba.git
synced 2024-12-27 03:21:53 +03:00
2242f2673c
Jeremy was able to use this correctly without comments, so the code can't be
*that* bad :-)
(This used to be commit 6f22f7c13f)
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*
|
|
Unix SMB/CIFS implementation.
|
|
In-memory cache
|
|
Copyright (C) Volker Lendecke 2007-2008
|
|
|
|
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; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __MEMCACHE_H__
|
|
#define __MEMCACHE_H__
|
|
|
|
#include "includes.h"
|
|
|
|
struct memcache;
|
|
|
|
/*
|
|
* A memcache can store different subkeys with overlapping keys, the
|
|
* memcache_number becomes part of the key. Feel free to add caches of your
|
|
* own here.
|
|
*
|
|
* If you add talloc type caches, also note this in the switch statement in
|
|
* memcache_is_talloc().
|
|
*/
|
|
|
|
enum memcache_number {
|
|
STAT_CACHE,
|
|
UID_SID_CACHE,
|
|
SID_UID_CACHE,
|
|
GID_SID_CACHE,
|
|
SID_GID_CACHE,
|
|
GETWD_CACHE,
|
|
GETPWNAM_CACHE, /* talloc */
|
|
MANGLE_HASH2_CACHE,
|
|
PDB_GETPWSID_CACHE, /* talloc */
|
|
SINGLETON_CACHE_TALLOC, /* talloc */
|
|
SINGLETON_CACHE
|
|
};
|
|
|
|
/*
|
|
* Create a memcache structure. max_size is in bytes, if you set it 0 it will
|
|
* not forget anything.
|
|
*/
|
|
|
|
struct memcache *memcache_init(TALLOC_CTX *mem_ctx, size_t max_size);
|
|
|
|
/*
|
|
* If you set this global memcache, use it as the default cache when NULL is
|
|
* passed to the memcache functions below. This is a workaround for many
|
|
* situations where passing the cache everywhere would be a big hassle.
|
|
*/
|
|
|
|
void memcache_set_global(struct memcache *cache);
|
|
|
|
/*
|
|
* Add a data blob to the cache
|
|
*/
|
|
|
|
void memcache_add(struct memcache *cache, enum memcache_number n,
|
|
DATA_BLOB key, DATA_BLOB value);
|
|
|
|
/*
|
|
* Add a talloc object to the cache. The difference to memcache_add() is that
|
|
* when the objects is to be discared, talloc_free is called for it. Also
|
|
* talloc_move() ownership of the object to the cache.
|
|
*
|
|
* Please note that the current implementation has a fixed relationship
|
|
* between what cache subtypes store talloc objects and which ones store plain
|
|
* blobs. We can fix this, but for now we don't have a mixed use of blobs vs
|
|
* talloc objects in the cache types.
|
|
*/
|
|
|
|
void memcache_add_talloc(struct memcache *cache, enum memcache_number n,
|
|
DATA_BLOB key, void *ptr);
|
|
|
|
/*
|
|
* Delete an object from the cache
|
|
*/
|
|
|
|
void memcache_delete(struct memcache *cache, enum memcache_number n,
|
|
DATA_BLOB key);
|
|
|
|
/*
|
|
* Look up an object from the cache. Memory still belongs to the cache, so
|
|
* make a copy of it if needed.
|
|
*/
|
|
|
|
bool memcache_lookup(struct memcache *cache, enum memcache_number n,
|
|
DATA_BLOB key, DATA_BLOB *value);
|
|
|
|
/*
|
|
* Look up an object from the cache. Memory still belongs to the cache, so
|
|
* make a copy of it if needed.
|
|
*/
|
|
|
|
void *memcache_lookup_talloc(struct memcache *cache, enum memcache_number n,
|
|
DATA_BLOB key);
|
|
|
|
/*
|
|
* Flush a complete cache subset.
|
|
*/
|
|
|
|
void memcache_flush(struct memcache *cache, enum memcache_number n);
|
|
|
|
#endif
|