/usr/include/gwenhywfar4/gwenhywfar/memcache.h is in libgwenhywfar-core-dev 4.15.3-5+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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begin : Mon Jul 14 2008
copyright : (C) 2008 by Martin Preuss
email : martin@libchipcard.de
***************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
* MA 02111-1307 USA *
* *
***************************************************************************/
#ifndef GWENHYWFAR_MEMCACHE_H
#define GWENHYWFAR_MEMCACHE_H
#include <gwenhywfar/gwenhywfarapi.h>
#include <time.h>
#include <inttypes.h>
typedef struct GWEN_MEMCACHE_ENTRY GWEN_MEMCACHE_ENTRY;
typedef struct GWEN_MEMCACHE GWEN_MEMCACHE;
GWENHYWFAR_API
void GWEN_MemCacheEntry_free(GWEN_MEMCACHE_ENTRY *me);
GWENHYWFAR_API
uint32_t GWEN_MemCacheEntry_GetId(GWEN_MEMCACHE_ENTRY *me);
GWENHYWFAR_API
void *GWEN_MemCacheEntry_GetDataPtr(GWEN_MEMCACHE_ENTRY *me);
GWENHYWFAR_API
size_t GWEN_MemCacheEntry_GetDataLen(GWEN_MEMCACHE_ENTRY *me);
GWENHYWFAR_API
int GWEN_MemCacheEntry_GetIsValid(const GWEN_MEMCACHE_ENTRY *me);
GWENHYWFAR_API
void GWEN_MemCacheEntry_BeginUse(GWEN_MEMCACHE_ENTRY *me);
GWENHYWFAR_API
void GWEN_MemCacheEntry_EndUse(GWEN_MEMCACHE_ENTRY *me);
GWENHYWFAR_API
GWEN_MEMCACHE *GWEN_MemCache_new(size_t maxCacheMemory,
uint32_t maxCacheEntries);
GWENHYWFAR_API
void GWEN_MemCache_free(GWEN_MEMCACHE *mc);
/**
* Returns the cache entry with the given id (if any).
* If NULL is returned then there is no entry with the given id,
* otherwise the use counter of the object returned is incremented.
* Therefore the caller has to call @ref GWEN_MemCacheEntry_EndUse
* after working with the object returned in order to release unused
* cache entries.
*/
GWENHYWFAR_API
GWEN_MEMCACHE_ENTRY *GWEN_MemCache_FindEntry(GWEN_MEMCACHE *mc,
uint32_t id);
/**
* Creates a cache entry for the given id. If there already is an entry
* of the given id that existing entry will first be invalidated.
* The use counter of the new object returned is 1, so the caller must
* call @ref GWEN_MemCacheEntry_EndUse after working with the object returned in
* order to release unused cache entries.
*/
GWENHYWFAR_API
GWEN_MEMCACHE_ENTRY *GWEN_MemCache_CreateEntry(GWEN_MEMCACHE *mc,
uint32_t id,
void *dataPtr,
size_t dataLen);
/**
* This function invalidates a given cache entry (if it exists).
* The data associated with that entry is not freed yet until all
* users of that entry called @ref GWEN_MemCacheEntry_EndUse (i.e.
* until the use counter of that entry reaches zero). However, the
* entry will be removed from the cache index so that future calls
* to @ref GWEN_MemCache_FindEntry will not return it.
*/
GWENHYWFAR_API
void GWEN_MemCache_PurgeEntry(GWEN_MEMCACHE *mc,
uint32_t id);
/**
* This function invalidates all entries whose ids match the given
* id/mask pair. See @ref GWEN_MemCache_PurgeEntry for implementation
* details and caveats.
*/
GWENHYWFAR_API
void GWEN_MemCache_PurgeEntries(GWEN_MEMCACHE *mc,
uint32_t id, uint32_t mask);
/**
* This function invalidates all cache entries.
* See @ref GWEN_MemCache_PurgeEntry for implementation
* details and caveats.
*/
GWENHYWFAR_API
void GWEN_MemCache_Purge(GWEN_MEMCACHE *mc);
#endif
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