GCIBuffer.cpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:4k
- /* 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 <ndb_global.h>
- #include "GCIBuffer.hpp"
- /*****************************************************************************
- * Constructor / Destructor
- *****************************************************************************/
- GCIBuffer::GCIBuffer(Uint32 gci, Uint32 id)
- {
- m_gci = gci;
- m_id = id;
- m_complete = false;
- m_receivedBytes = 0;
- }
- GCIBuffer::~GCIBuffer()
- {
- /**
- * Loop through all pages and delete them
- */
- for(Uint32 i=0; i<m_pageList.size(); i++) {
- delete m_pageList[i];
- m_pageList[i] = 0;
- }
- m_pageList.clear();
- // m_pageList = 0;
- }
- /*****************************************************************************
- * Inserts
- *****************************************************************************/
- void
- GCIBuffer::insertLogRecord(Uint32 tableId, Uint32 operation,
- class LinearSectionPtr ptr[3])
- {
- GCIPage * p;
- if(m_pageList.size() == 0) {
- p = new GCIPage(m_gci);
- assert(p != NULL);
- m_pageList.push_back(p);
- }
- p = m_pageList.back();
- if (!p->insertLogRecord(tableId, operation, ptr)) {
- /**
- * GCIPage is full.
- */
- GCIPage * newPage = new GCIPage(m_gci);
- assert(newPage != NULL);
- m_pageList.push_back(newPage);
- bool res = newPage->insertLogRecord(tableId, operation, ptr);
-
- if(!res) {
- ndbout << "GCIBuffer: gci : " << m_gci << endl;
- assert(res);
- }
- }
- }
- /**
- * @todo: We must be able to distinguish between Scan meta
- * data and log meta data.
- * Currently only scan meta data is considered.
- */
- void
- GCIBuffer::insertMetaRecord(Uint32 tableId, class LinearSectionPtr ptr[3])
- {
- GCIPage * p;
- if(m_pageList.size()==0) {
- p = new GCIPage(m_gci);
- assert(p != NULL);
- m_pageList.push_back(p);
- }
-
- p = m_pageList.back();
-
- if (!p->insertMetaRecord(tableId, ptr)) {
- /**
- * Page is full.
- */
- GCIPage * newPage = new GCIPage(m_gci);
- assert(newPage != NULL);
- m_pageList.push_back(newPage);
-
- bool res = newPage->insertMetaRecord(tableId, ptr);
- assert(res);
- }
- }
- void
- GCIBuffer::insertPage(Uint32 gci, char * dataPtr, Uint32 dataBLen)
- {
- /**
- * allocate a new GCIPage
- */
- GCIPage * page = new GCIPage(gci);
- assert(page != 0);
- /**
- * copy data into page
- */
- page->copyDataToPage(dataPtr, dataBLen);
-
- /**
- * put page on pagelist.
- */
- m_pageList.push_back(page);
-
- /**
- * Update GCI Buffer received bytes
- */
- m_receivedBytes += dataBLen;
- }
- /*****************************************************************************
- * Iterator
- *****************************************************************************/
- GCIBuffer::iterator::iterator(const GCIBuffer* gciBuffer)
- {
- m_gciBuffer = gciBuffer;
- m_iterator=0;
- }
- GCIPage *
- GCIBuffer::iterator::first()
- {
- m_iterator = 0;
- if(m_gciBuffer->m_pageList.size() == 0) return NULL;
- return (m_gciBuffer->m_pageList)[m_iterator];
- }
- GCIPage *
- GCIBuffer::iterator::next()
- {
- m_iterator++;
- if(m_gciBuffer->m_pageList.size() == 0) return NULL;
- if((m_iterator<m_gciBuffer->m_pageList.size()))
- return (m_gciBuffer->m_pageList)[m_iterator];
- else
- return NULL;
- }
- bool
- GCIBuffer::iterator::exists()
- {
- return (m_iterator < m_gciBuffer->m_pageList.size());
- }