PoolNdb.cpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
- /* 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);
- }