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/* Copyright (C) 2003 MySQL AB
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef DictCache_H
#define DictCache_H
#include <ndb_types.h>
#include <kernel_types.h>
#include <NdbError.hpp>
#include <BaseString.hpp>
#include <Vector.hpp>
#include <UtilBuffer.hpp>
#include <NdbDictionary.hpp>
#include <Ndb.hpp>
#include <NdbCondition.h>
#include "NdbLinHash.hpp"
class Ndb_local_table_info {
public:
static Ndb_local_table_info *create(NdbTableImpl *table_impl, Uint32 sz=0);
static void destroy(Ndb_local_table_info *);
NdbTableImpl *m_table_impl;
Uint64 m_local_data[1]; // Must be last member. Used to access extra space.
private:
Ndb_local_table_info(NdbTableImpl *table_impl);
~Ndb_local_table_info();
};
/**
* A non thread safe dict cache
*/
class LocalDictCache {
public:
LocalDictCache();
~LocalDictCache();
Ndb_local_table_info * get(const char * name);
void put(const char * name, Ndb_local_table_info *);
void drop(const char * name);
NdbLinHash<Ndb_local_table_info> m_tableHash; // On name
};
/**
* A thread safe dict cache
*/
class GlobalDictCache : public NdbLockable {
public:
GlobalDictCache();
~GlobalDictCache();
NdbTableImpl * get(const char * name);
NdbTableImpl* put(const char * name, NdbTableImpl *);
void drop(NdbTableImpl *);
void release(NdbTableImpl *);
public:
enum Status {
OK = 0,
DROPPED = 1,
RETREIVING = 2
};
private:
void printCache();
struct TableVersion {
Uint32 m_version;
Uint32 m_refCount;
NdbTableImpl * m_impl;
Status m_status;
};
NdbLinHash<Vector<TableVersion> > m_tableHash;
NdbCondition * m_waitForTableCondition;
};
#endif
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