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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 */
#include "MetaData.hpp"
#include "SimulatedBlock.hpp"
#include <blocks/dbdict/Dbdict.hpp>
#include <blocks/dbdih/Dbdih.hpp>
// MetaData::Common
MetaData::Common::Common(Dbdict& dbdict, Dbdih& dbdih) :
m_dbdict(dbdict),
m_dbdih(dbdih)
{
m_lock[false] = m_lock[true] = 0;
}
// MetaData::Table
// MetaData
MetaData::MetaData(Common& common) :
m_common(common)
{
m_lock[false] = m_lock[true] = 0;
}
MetaData::MetaData(SimulatedBlock* block) :
m_common(*block->getMetaDataCommon())
{
m_lock[false] = m_lock[true] = 0;
}
MetaData::~MetaData()
{
for (int i = false; i <= true; i++) {
assert(m_common.m_lock[i] >= m_lock[i]);
m_common.m_lock[i] -= m_lock[i];
m_lock[i] = 0;
}
}
int
MetaData::lock(bool exclusive)
{
if (m_common.m_lock[true] > m_lock[true]) {
// locked exclusively by another instance
return MetaData::Locked;
}
m_lock[exclusive]++;
m_common.m_lock[exclusive]++;
return 0;
}
int
MetaData::unlock(bool exclusive)
{
if (m_lock[exclusive] == 0) {
return MetaData::NotLocked;
}
m_lock[exclusive]--;
m_common.m_lock[exclusive]--;
return 0;
}
int
MetaData::getTable(MetaData::Table& table, Uint32 tableId, Uint32 tableVersion)
{
if (m_lock[false] + m_lock[true] == 0) {
return MetaData::NotLocked;
}
return m_common.m_dbdict.getMetaTable(table, tableId, tableVersion);
}
int
MetaData::getTable(MetaData::Table& table, const char* tableName)
{
if (m_lock[false] + m_lock[true] == 0) {
return MetaData::NotLocked;
}
return m_common.m_dbdict.getMetaTable(table, tableName);
}
int
MetaData::getAttribute(MetaData::Attribute& attribute, const MetaData::Table& table, Uint32 attributeId)
{
if (m_lock[false] + m_lock[true] == 0) {
return MetaData::NotLocked;
}
return m_common.m_dbdict.getMetaAttribute(attribute, table, attributeId);
}
int
MetaData::getAttribute(MetaData::Attribute& attribute, const MetaData::Table& table, const char* attributeName)
{
if (m_lock[false] + m_lock[true] == 0) {
return MetaData::NotLocked;
}
return m_common.m_dbdict.getMetaAttribute(attribute, table, attributeName);
}
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