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LogHandlerList.cpp
Package: mysql-4.1.16-win-src.zip [view]
Upload User: romrleung
Upload Date: 2022-05-23
Package Size: 18897k
Code Size: 3k
Category:
MySQL
Development Platform:
Visual C++
- /* 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 "LogHandlerList.hpp"
- #include <LogHandler.hpp>
- //
- // PUBLIC
- //
- LogHandlerList::LogHandlerList() :
- m_size(0),
- m_pHeadNode(NULL),
- m_pTailNode(NULL),
- m_pCurrNode(NULL)
- {
- }
- LogHandlerList::~LogHandlerList()
- {
- removeAll();
- }
- void
- LogHandlerList::add(LogHandler* pNewHandler)
- {
- LogHandlerNode* pNode = new LogHandlerNode();
- if (m_pHeadNode == NULL)
- {
- m_pHeadNode = pNode;
- pNode->pPrev = NULL;
- }
- else
- {
- m_pTailNode->pNext = pNode;
- pNode->pPrev = m_pTailNode;
- }
- m_pTailNode = pNode;
- pNode->pNext = NULL;
- pNode->pHandler = pNewHandler;
- m_size++;
- }
- bool
- LogHandlerList::remove(LogHandler* pRemoveHandler)
- {
- LogHandlerNode* pNode = m_pHeadNode;
- bool removed = false;
- do
- {
- if (pNode->pHandler == pRemoveHandler)
- {
- removeNode(pNode);
- removed = true;
- break;
- }
- } while ( (pNode = next(pNode)) != NULL);
- return removed;
- }
- void
- LogHandlerList::removeAll()
- {
- while (m_pHeadNode != NULL)
- {
- removeNode(m_pHeadNode);
- }
- }
- LogHandler*
- LogHandlerList::next()
- {
- LogHandler* pHandler = NULL;
- if (m_pCurrNode == NULL)
- {
- m_pCurrNode = m_pHeadNode;
- if (m_pCurrNode != NULL)
- {
- pHandler = m_pCurrNode->pHandler;
- }
- }
- else
- {
- m_pCurrNode = next(m_pCurrNode); // Next node
- if (m_pCurrNode != NULL)
- {
- pHandler = m_pCurrNode->pHandler;
- }
- }
- return pHandler;
- }
- int
- LogHandlerList::size() const
- {
- return m_size;
- }
- //
- // PRIVATE
- //
- LogHandlerList::LogHandlerNode*
- LogHandlerList::next(LogHandlerNode* pNode)
- {
- LogHandlerNode* pCurr = pNode;
- if (pNode->pNext != NULL)
- {
- pCurr = pNode->pNext;
- }
- else
- {
- // Tail
- pCurr = NULL;
- }
- return pCurr;
- }
- LogHandlerList::LogHandlerNode*
- LogHandlerList::prev(LogHandlerNode* pNode)
- {
- LogHandlerNode* pCurr = pNode;
- if (pNode->pPrev != NULL) // head
- {
- pCurr = pNode->pPrev;
- }
- else
- {
- // Head
- pCurr = NULL;
- }
- return pCurr;
- }
- void
- LogHandlerList::removeNode(LogHandlerNode* pNode)
- {
- if (pNode->pPrev == NULL) // If head
- {
- m_pHeadNode = pNode->pNext;
- }
- else
- {
- pNode->pPrev->pNext = pNode->pNext;
- }
- if (pNode->pNext == NULL) // if tail
- {
- m_pTailNode = pNode->pPrev;
- }
- else
- {
- pNode->pNext->pPrev = pNode->pPrev;
- }
- pNode->pNext = NULL;
- pNode->pPrev = NULL;
- delete pNode->pHandler; // Delete log handler
- delete pNode;
- m_size--;
- }