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WatchDog.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 <ndb_global.h>
- #include <my_pthread.h>
- #include "WatchDog.hpp"
- #include "GlobalData.hpp"
- #include <NdbOut.hpp>
- #include <NdbSleep.h>
- #include <ErrorHandlingMacros.hpp>
- extern "C"
- void*
- runWatchDog(void* w){
- ((WatchDog*)w)->run();
- return NULL;
- }
- WatchDog::WatchDog(Uint32 interval) :
- theIPValue(globalData.getWatchDogPtr())
- {
- setCheckInterval(interval);
- theStop = false;
- theThreadPtr = 0;
- }
- WatchDog::~WatchDog(){
- doStop();
- }
- Uint32
- WatchDog::setCheckInterval(Uint32 interval){
- // An interval of less than 70ms is not acceptable
- return theInterval = (interval < 70 ? 70 : interval);
- }
- void
- WatchDog::doStart(){
- theStop = false;
- theThreadPtr = NdbThread_Create(runWatchDog,
- (void**)this,
- 32768,
- "ndb_watchdog",
- NDB_THREAD_PRIO_HIGH);
- }
- void
- WatchDog::doStop(){
- void *status;
- theStop = true;
- if(theThreadPtr){
- NdbThread_WaitFor(theThreadPtr, &status);
- NdbThread_Destroy(&theThreadPtr);
- }
- }
- void
- WatchDog::run(){
- unsigned int anIPValue;
- unsigned int alerts = 0;
- unsigned int oldIPValue = 0;
- // WatchDog for the single threaded NDB
- while(!theStop){
- Uint32 tmp = theInterval / 500;
- tmp= (tmp ? tmp : 1);
- while(!theStop && tmp > 0){
- NdbSleep_MilliSleep(500);
- tmp--;
- }
- if(theStop)
- break;
- // Verify that the IP thread is not stuck in a loop
- anIPValue = *theIPValue;
- if(anIPValue != 0) {
- oldIPValue = anIPValue;
- globalData.incrementWatchDogCounter(0);
- alerts = 0;
- } else {
- alerts++;
- ndbout << "Ndb kernel is stuck in: ";
- switch (oldIPValue) {
- case 1:
- ndbout << "Job Handling" << endl;
- break;
- case 2:
- ndbout << "Scanning Timers" << endl;
- break;
- case 3:
- ndbout << "External I/O" << endl;
- break;
- case 4:
- ndbout << "Print Job Buffers at crash" << endl;
- break;
- case 5:
- ndbout << "Checking connections" << endl;
- break;
- case 6:
- ndbout << "Performing Send" << endl;
- break;
- case 7:
- ndbout << "Polling for Receive" << endl;
- break;
- case 8:
- ndbout << "Performing Receive" << endl;
- break;
- default:
- ndbout << "Unknown place" << endl;
- break;
- }//switch
- if(alerts == 3){
- shutdownSystem();
- }
- }
- }
- return;
- }
- void
- WatchDog::shutdownSystem(){
- ErrorReporter::handleError(ecError,
- ERR_PROGRAMERROR,
- "WatchDog terminate",
- __FILE__,
- NST_Watchdog);
- }