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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 <common/common.hpp>
#include <NdbMutex.h>
#include <NdbApi.hpp>
#include "PoolNdb.hpp"
#ifdef NDB_WIN32
static NdbMutex & ndb_mutex = * NdbMutex_Create();
#else
static NdbMutex ndb_mutex = NDB_MUTEX_INITIALIZER;
#endif
PoolNdb::PoolNdb() :
m_cntUsed(0),
m_cntFree(0)
{
}
PoolNdb::~PoolNdb()
{
}
Ndb*
PoolNdb::allocate(Ctx& ctx, int timeout)
{
NdbMutex_Lock(&ndb_mutex);
Ndb* pNdb;
if (m_cntFree == 0) {
pNdb = new Ndb("TEST_DB");
pNdb->useFullyQualifiedNames(true);
if (pNdb->init(64) < 0) {
ctx.pushStatus(pNdb, "init");
delete pNdb;
NdbMutex_Unlock(&ndb_mutex);
return 0;
}
if (pNdb->waitUntilReady(timeout) < 0) {
ctx.pushStatus(Sqlstate::_HYT00, Error::Gen, "connection timeout after %d seconds", timeout);
ctx.pushStatus(pNdb, "waitUntilReady");
delete pNdb;
NdbMutex_Unlock(&ndb_mutex);
return 0;
}
m_listFree.push_back(pNdb);
m_cntFree++;
}
pNdb = m_listFree.front();
m_listFree.pop_front();
m_cntFree--;
m_cntUsed++;
ctx_log1(("alloc Ndb: used=%u free=%u", m_cntUsed, m_cntFree));
NdbMutex_Unlock(&ndb_mutex);
return pNdb;
}
void
PoolNdb::release(Ctx& ctx, Ndb* pNdb)
{
NdbMutex_Lock(&ndb_mutex);
m_listUsed.remove(pNdb);
m_listFree.push_back(pNdb);
m_cntFree++;
m_cntUsed--;
ctx_log1(("free Ndb: used=%u free=%u", m_cntUsed, m_cntFree));
NdbMutex_Unlock(&ndb_mutex);
}
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