SignalCounter.hpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:3k
- /* 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 */
- #ifndef SIGNAL_COUNTER_HPP
- #define SIGNAL_COUNTER_HPP
- #include <NodeBitmask.hpp>
- #include <ErrorReporter.hpp>
- class SignalCounter {
- friend struct NodeReceiverGroup;
-
- private:
- Uint32 m_count;
- NdbNodeBitmask m_nodes;
- public:
- SignalCounter() { clearWaitingFor();}
- void clearWaitingFor();
-
- /**
- * When sending to different node
- */
- void setWaitingFor(Uint32 nodeId);
- void clearWaitingFor(Uint32 nodeId);
- void forceClearWaitingFor(Uint32 nodeId);
-
- bool isWaitingFor(Uint32 nodeId) const;
- bool done() const;
- const char * getText() const;
- SignalCounter& operator=(const NdbNodeBitmask & bitmask);
- SignalCounter& operator=(const NodeReceiverGroup& rg) {
- return (* this) = rg.m_nodes;
- }
- /**
- * When sending to same node
- */
- SignalCounter& operator=(Uint32 count);
- SignalCounter& operator--(int);
- SignalCounter& operator++(int);
- SignalCounter& operator+=(Uint32);
- Uint32 getCount() const;
- };
- inline
- void
- SignalCounter::setWaitingFor(Uint32 nodeId) {
- if(!m_nodes.get(nodeId)){
- m_nodes.set(nodeId);
- m_count++;
- return;
- }
- ErrorReporter::handleAssert("SignalCounter::set", __FILE__, __LINE__);
- }
- inline
- bool
- SignalCounter::isWaitingFor(Uint32 nodeId) const {
- return m_nodes.get(nodeId);
- }
- inline
- bool
- SignalCounter::done() const {
- return m_count == 0;
- }
- inline
- Uint32
- SignalCounter::getCount() const {
- return m_count;
- }
- inline
- void
- SignalCounter::clearWaitingFor(Uint32 nodeId) {
- if(m_nodes.get(nodeId) && m_count > 0){
- m_count--;
- m_nodes.clear(nodeId);
- return;
- }
- ErrorReporter::handleAssert("SignalCounter::clear", __FILE__, __LINE__);
- }
- inline
- void
- SignalCounter::clearWaitingFor(){
- m_count = 0;
- m_nodes.clear();
- }
- inline
- void
- SignalCounter::forceClearWaitingFor(Uint32 nodeId){
- if(isWaitingFor(nodeId)){
- clearWaitingFor(nodeId);
- }
- }
- inline
- SignalCounter&
- SignalCounter::operator=(Uint32 count){
- m_count = count;
- m_nodes.clear();
- return * this;
- }
- inline
- SignalCounter&
- SignalCounter::operator--(int){
- if(m_count > 0){
- m_count--;
- return * this;
- }
- ErrorReporter::handleAssert("SignalCounter::operator--", __FILE__, __LINE__);
- return * this;
- }
- inline
- SignalCounter&
- SignalCounter::operator++(int){
- m_count++;
- return * this;
- }
- inline
- SignalCounter&
- SignalCounter::operator+=(Uint32 n){
- m_count += n;
- return * this;
- }
- inline
- const char *
- SignalCounter::getText() const {
- static char buf[255];
- static char nodes[NodeBitmask::TextLength+1];
- BaseString::snprintf(buf, sizeof(buf), "[SignalCounter: m_count=%d %s]", m_count, m_nodes.getText(nodes));
- return buf;
- }
- inline
- SignalCounter&
- SignalCounter::operator=(const NdbNodeBitmask & bitmask){
- m_nodes = bitmask;
- m_count = bitmask.count();
- return * this;
- }
- #endif