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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; 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 NDB_OBJECT_ID_MAP_HPP
#define NDB_OBJECT_ID_MAP_HPP
#include <ndb_global.h>
//#include <NdbMutex.h>
#include <NdbOut.hpp>
#include <EventLogger.hpp>
extern EventLogger g_eventLogger;
//#define DEBUG_OBJECTMAP
/**
* Global ObjectMap
*/
class NdbObjectIdMap //: NdbLockable
{
public:
STATIC_CONST( InvalidId = ~(Uint32)0 );
NdbObjectIdMap(NdbMutex*, Uint32 initalSize = 128, Uint32 expandSize = 10);
~NdbObjectIdMap();
Uint32 map(void * object);
void * unmap(Uint32 id, void *object);
void * getObject(Uint32 id);
private:
Uint32 m_size;
Uint32 m_expandSize;
Uint32 m_firstFree;
union MapEntry {
Uint32 m_next;
void * m_obj;
} * m_map;
NdbMutex * m_mutex;
int expand(Uint32 newSize);
};
inline
Uint32
NdbObjectIdMap::map(void * object){
// lock();
if(m_firstFree == InvalidId && expand(m_expandSize))
return InvalidId;
Uint32 ff = m_firstFree;
m_firstFree = m_map[ff].m_next;
m_map[ff].m_obj = object;
// unlock();
DBUG_PRINT("info",("NdbObjectIdMap::map(0x%lx) %u", (long) object, ff<<2));
return ff<<2;
}
inline
void *
NdbObjectIdMap::unmap(Uint32 id, void *object){
Uint32 i = id>>2;
// lock();
if(i < m_size){
void * obj = m_map[i].m_obj;
if (object == obj) {
m_map[i].m_next = m_firstFree;
m_firstFree = i;
} else {
g_eventLogger.error("NdbObjectIdMap::unmap(%u, 0x%x) obj=0x%x",
id, (long) object, (long) obj);
DBUG_PRINT("error",("NdbObjectIdMap::unmap(%u, 0x%lx) obj=0x%lx",
id, (long) object, (long) obj));
return 0;
}
// unlock();
DBUG_PRINT("info",("NdbObjectIdMap::unmap(%u) obj=0x%lx", id, (long) obj));
return obj;
}
return 0;
}
inline void *
NdbObjectIdMap::getObject(Uint32 id){
// DBUG_PRINT("info",("NdbObjectIdMap::getObject(%u) obj=0x%x", id, m_map[id>>2].m_obj));
id >>= 2;
if(id < m_size){
return m_map[id].m_obj;
}
return 0;
}
#endif
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