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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 ODBC_HANDLES_HandleRoot_hpp
#define ODBC_HANDLES_HandleRoot_hpp
#include <list>
#include <map>
#include <common/common.hpp>
#include "HandleBase.hpp"
class HandleEnv;
class HandleDbc;
class HandleStmt;
class HandleDesc;
class PoolNdb;
/**
* @class HandleRoot
* @brief The singleton root handle.
*
* This class is the level above HandleEnv. It has a single
* instance. The instance is the root node of dynamically
* allocated handles. The instance is also used to call methods
* not tied to any handle.
*/
class HandleRoot : public HandleBase {
protected:
HandleRoot();
~HandleRoot();
public:
static HandleRoot* instance();
HandleRoot* getRoot();
HandleBase* getParent();
PoolNdb* getPoolNdb();
OdbcHandle odbcHandle();
void lockHandle();
void unlockHandle();
// check and find handle types and handles
SQLSMALLINT findParentType(SQLSMALLINT childType);
HandleBase* findBase(SQLSMALLINT handleType, void* pHandle);
HandleEnv* findEnv(void* pHandle);
HandleDbc* findDbc(void* pHandle);
HandleStmt* findStmt(void* pHandle);
HandleDesc* findDesc(void* pHandle);
// add or remove handle from validation list
void record(SQLSMALLINT handleType, HandleBase* pHandle, bool add);
// allocate and free handles
void sqlAllocEnv(Ctx& ctx, HandleEnv** ppEnv);
void sqlAllocHandle(Ctx& ctx, SQLSMALLINT childType, HandleBase** ppChild);
void sqlFreeEnv(Ctx& ctx, HandleEnv* pEnv);
void sqlFreeHandle(Ctx& ctx, SQLSMALLINT childType, HandleBase* pChild);
// process-level attributes
void sqlSetRootAttr(Ctx& ctx, SQLINTEGER attribute, SQLPOINTER value, SQLINTEGER stringLength);
void sqlGetRootAttr(Ctx& ctx, SQLINTEGER attribute, SQLPOINTER value, SQLINTEGER bufferLength, SQLINTEGER* stringLength);
private:
static HandleRoot* m_instance; // the instance
std::list<HandleEnv*> m_listEnv;
PoolNdb* m_poolNdb;
typedef std::map<void*, SQLSMALLINT> ValidList;
ValidList m_validList;
static AttrSpec m_attrSpec[];
AttrArea m_attrArea;
};
inline HandleRoot*
HandleRoot::getRoot()
{
return this;
}
inline HandleBase*
HandleRoot::getParent()
{
return 0;
}
inline PoolNdb*
HandleRoot::getPoolNdb()
{
return m_poolNdb;
}
inline OdbcHandle
HandleRoot::odbcHandle()
{
return Odbc_handle_root;
}
#endif
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