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/* Copyright (C) 2005 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; version 2 of the License.
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 PLUGIN_INFORMATION_ENGINE_HA_INFORMATION_ENGINE_H
#define PLUGIN_INFORMATION_ENGINE_HA_INFORMATION_ENGINE_H
#include <drizzled/server_includes.h>
#include <drizzled/handler.h>
#include <mysys/thr_lock.h>
#include "information_share.h"
/*
Class definition for the information engine
*/
class InformationCursor: public handler
{
THR_LOCK_DATA lock; /* MySQL lock */
InformationShare *share;
public:
InformationCursor(drizzled::plugin::StorageEngine *engine, TableShare *table_arg);
~InformationCursor()
{}
/*
The name of the index type that will be used for display
don't implement this method unless you really have indexes
*/
uint64_t table_flags() const
{
return 0;
}
uint32_t index_flags(uint32_t inx, uint32_t part, bool all_parts) const;
/* The following defines can be increased if necessary */
int open(const char *name, int mode, uint32_t test_if_locked);
int close(void);
int write_row(unsigned char * buf);
int rnd_init(bool scan);
int rnd_next(unsigned char *buf);
int rnd_pos(unsigned char * buf, unsigned char *pos);
void position(const unsigned char *record);
int info(uint32_t flag);
int external_lock(Session *session, int lock_type);
THR_LOCK_DATA **store_lock(Session *session,
THR_LOCK_DATA **to,
enum thr_lock_type lock_type);
};
static const char *InformationEngine_exts[] = {
NULL
};
class InformationEngineNameIterator: public drizzled::plugin::TableNameIteratorImplementation
{
public:
InformationEngineNameIterator(const std::string &database)
: drizzled::plugin::TableNameIteratorImplementation(database)
{};
int next(std::string *)
{
return 1;
}
};
class InformationEngine : public drizzled::plugin::StorageEngine
{
public:
InformationEngine(const string &name_arg)
: drizzled::plugin::StorageEngine(name_arg,
HTON_FILE_BASED
| HTON_HAS_DATA_DICTIONARY) {}
virtual handler *create(TableShare *table, MEM_ROOT *mem_root)
{
return new (mem_root) InformationCursor(this, table);
}
const char **bas_ext() const {
return InformationEngine_exts;
}
int createTableImplementation(Session*, const char *, Table *,
HA_CREATE_INFO *, drizzled::message::Table*);
int deleteTableImplementation(Session*, const string table_name);
drizzled::plugin::TableNameIteratorImplementation* tableNameIterator(const std::string &database)
{
return new InformationEngineNameIterator(database);
}
};
#endif /* PLUGIN_INFORMATION_ENGINE_HA_INFORMATION_ENGINE_H */
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