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.
83 lines
2.1 KiB
83 lines
2.1 KiB
//
|
|
// WordDBInfo.h
|
|
//
|
|
// NAME
|
|
// inverted index usage environment.
|
|
//
|
|
// SYNOPSIS
|
|
//
|
|
// Only called thru WordContext::Initialize()
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// The inverted indexes may be shared among processes/threads and provide the
|
|
// appropriate locking to prevent mistakes. In addition the memory cache
|
|
// used by <i>WordList</i> objects may be shared by processes/threads,
|
|
// greatly reducing the memory needs in multi-process applications.
|
|
// For more information about the shared environment, check the Berkeley
|
|
// DB documentation.
|
|
//
|
|
// CONFIGURATION
|
|
//
|
|
// wordlist_env_skip {true,false} (default false)
|
|
// If true no environment is created at all. This must never
|
|
// be used if a <i>WordList</i> object is created. It may be
|
|
// useful if only <i>WordKey</i> objects are used, for instance.
|
|
//
|
|
// wordlist_env_share {true,false} (default false)
|
|
// If true a sharable environment is open or created if none exist.
|
|
//
|
|
// wordlist_env_dir <directory> (default .)
|
|
// Only valid if <i>wordlist_env_share</i> set to <i>true.</i>
|
|
// Specify the directory in which the sharable environment will
|
|
// be created. All
|
|
// inverted indexes specified with a non-absolute pathname will be
|
|
// created relative to this directory.
|
|
//
|
|
//
|
|
// END
|
|
//
|
|
// Part of the ht://Dig package <http://www.htdig.org/>
|
|
// Copyright (c) 1999-2004 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>
|
|
//
|
|
//
|
|
|
|
#ifndef _WordDBInfo_h_
|
|
#define _WordDBInfo_h_
|
|
|
|
#include "Configuration.h"
|
|
|
|
struct __db_env;
|
|
|
|
class WordDBInfo
|
|
{
|
|
public:
|
|
WordDBInfo(const Configuration& config);
|
|
~WordDBInfo();
|
|
//
|
|
// Unique instance handlers
|
|
//
|
|
static void Initialize(const Configuration& config);
|
|
|
|
static WordDBInfo* Instance() {
|
|
if(instance) return instance;
|
|
fprintf(stderr, "WordDBInfo::Instance: no instance\n");
|
|
return 0;
|
|
}
|
|
|
|
//
|
|
// Berkeley DB environment
|
|
//
|
|
struct __db_env *dbenv;
|
|
|
|
//
|
|
// Unique instance pointer
|
|
//
|
|
static WordDBInfo* instance;
|
|
};
|
|
|
|
#endif
|