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ObjectMap.cpp
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92 lines (81 loc) · 2.17 KB
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/*
Copyright (C) 2007, 2008 MySQL AB, 2008 Sun Microsystems, Inc.
All rights reserved. Use is subject to license terms.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "ObjectMap.hpp"
NdbObjectIdMap::NdbObjectIdMap(Uint32 sz, Uint32 eSz):
m_expandSize(eSz),
m_size(0),
m_firstFree(InvalidId),
m_lastFree(InvalidId),
m_map(0)
{
expand(sz);
#ifdef DEBUG_OBJECTMAP
ndbout_c("NdbObjectIdMap:::NdbObjectIdMap(%u)", sz);
#endif
}
NdbObjectIdMap::~NdbObjectIdMap()
{
assert(checkConsistency());
free(m_map);
m_map = NULL;
}
int NdbObjectIdMap::expand(Uint32 incSize)
{
assert(checkConsistency());
Uint32 newSize = m_size + incSize;
MapEntry * tmp = (MapEntry*)realloc(m_map, newSize * sizeof(MapEntry));
if (likely(tmp != 0))
{
m_map = tmp;
for(Uint32 i = m_size; i < newSize-1; i++)
{
m_map[i].setNext(i+1);
}
m_firstFree = m_size;
m_lastFree = newSize - 1;
m_map[newSize-1].setNext(InvalidId);
m_size = newSize;
assert(checkConsistency());
}
else
{
g_eventLogger->error("NdbObjectIdMap::expand: realloc(%u*%lu) failed",
newSize, sizeof(MapEntry));
return -1;
}
return 0;
}
bool NdbObjectIdMap::checkConsistency()
{
if (m_firstFree == InvalidId)
{
for (Uint32 i = 0; i<m_size; i++)
{
if (m_map[i].isFree())
{
assert(false);
return false;
}
}
return true;
}
Uint32 i = m_firstFree;
while (m_map[i].getNext() != InvalidId)
{
i = m_map[i].getNext();
}
assert(i == m_lastFree);
return i == m_lastFree;
}