diff options
Diffstat (limited to 'debian/htdig/htdig-3.2.0b6/htsearch/VolatileCache.cc')
| -rw-r--r-- | debian/htdig/htdig-3.2.0b6/htsearch/VolatileCache.cc | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/debian/htdig/htdig-3.2.0b6/htsearch/VolatileCache.cc b/debian/htdig/htdig-3.2.0b6/htsearch/VolatileCache.cc new file mode 100644 index 00000000..d3f21f5e --- /dev/null +++ b/debian/htdig/htdig-3.2.0b6/htsearch/VolatileCache.cc @@ -0,0 +1,77 @@ +// +// VolatileCache.cc +// +// VolatileCache: the simplest non-persistent Query result cache. +// This is default policy. +// +// Part of the ht://Dig package <http://www.htdig.org/> +// Copyright (c) 1995-2004 The ht://Dig Group +// For copyright details, see the file COPYING in your distribution +// or the GNU Library General Public License (LGPL) version 2 or later +// <http://www.gnu.org/copyleft/lgpl.html> +// +// $Id: VolatileCache.cc,v 1.4 2004/05/28 13:15:24 lha Exp $ +// + +#include "VolatileCache.h" +#include "ResultList.h" + +// +// a pseudo-constant empty result list +// used to avoid null pointers in the cache +// +ResultList theEmptyResult; + +ResultList * const +VolatileCache::empty = &theEmptyResult; + +extern int debug; + +// +// find a cache entry +// +ResultList * +VolatileCache::Lookup(const String &signature) +{ + ResultList *result = (ResultList *)cache[signature]; + return result; +} + +// +// add a cache entry +// +void +VolatileCache::Add(const String &signature, ResultList *entry) +{ + ResultList *previous = (ResultList *)cache[signature]; + if(previous && previous != empty) + { + delete previous; + } + if(!entry) + { + entry = empty; + } + cache.Add(signature, entry); +} + +// +// clear the in-memory cache +// avoids deletion of the shared 'empty' element +// +VolatileCache::~VolatileCache() +{ + if(debug) cerr << "query CLEAR: entries=" << cache.Count() << endl; + cache.Start_Get(); + ResultList *kill = (ResultList *)cache.Get_NextElement(); + while(kill) + { + if(kill != empty) + { + delete kill; + } + kill = (ResultList *)cache.Get_NextElement(); + } + cache.Release(); +} + |