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https://github.com/MultiMC/MultiMC5.git
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f3fffd5259
This fixes some issues where MultiMC was segfaulting on exit because things were trying to write to the logger while they were being destroyed, but the destinations had already been destroyed and were left in the list.
143 lines
3.6 KiB
C++
143 lines
3.6 KiB
C++
// Copyright (c) 2010, Razvan Petru
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// All rights reserved.
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice, this
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// list of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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// * The name of the contributors may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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// OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "QsLog.h"
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#include "QsLogDest.h"
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#include <QMutex>
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#include <QList>
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#include <QDateTime>
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#include <QtGlobal>
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#include <cassert>
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#include <cstdlib>
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#include <stdexcept>
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namespace QsLogging
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{
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typedef QList<Destination *> DestinationList;
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static const char *LevelStrings[] = {"TRACE", "DEBUG", "INFO", "WARN", "ERROR", "FATAL"
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"UNKNOWN"};
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// not using Qt::ISODate because we need the milliseconds too
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static const QString fmtDateTime("hhhh:mm:ss.zzz");
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static const char *LevelToText(Level theLevel)
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{
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if (theLevel > FatalLevel)
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{
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assert(!"bad log level");
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return LevelStrings[UnknownLevel];
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}
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return LevelStrings[theLevel];
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}
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class LoggerImpl
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{
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public:
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LoggerImpl() : level(InfoLevel)
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{
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}
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QMutex logMutex;
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Level level;
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DestinationList destList;
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};
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Logger::Logger() : d(new LoggerImpl)
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{
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}
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Logger::~Logger()
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{
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delete d;
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}
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void Logger::addDestination(Destination *destination)
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{
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assert(destination);
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d->destList.push_back(destination);
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}
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void Logger::setLoggingLevel(Level newLevel)
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{
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d->level = newLevel;
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}
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Level Logger::loggingLevel() const
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{
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return d->level;
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}
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//! creates the complete log message and passes it to the logger
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void Logger::Helper::writeToLog()
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{
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const char *const levelName = LevelToText(level);
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const QString completeMessage(QString("%1\t%2").arg(levelName, 5).arg(buffer));
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Logger &logger = Logger::instance();
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QMutexLocker lock(&logger.d->logMutex);
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logger.write(completeMessage);
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}
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Logger::Helper::Helper(Level logLevel) : level(logLevel), qtDebug(&buffer)
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{
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}
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Logger::Helper::~Helper()
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{
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try
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{
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writeToLog();
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}
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catch (std::exception &e)
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{
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// you shouldn't throw exceptions from a sink
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Q_UNUSED(e);
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assert(!"exception in logger helper destructor");
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throw;
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}
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}
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//! sends the message to all the destinations
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void Logger::write(const QString &message)
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{
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for (DestinationList::iterator it = d->destList.begin(), endIt = d->destList.end();
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it != endIt; ++it)
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{
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if (!(*it))
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{
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assert(!"null log destination");
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continue;
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}
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(*it)->write(message);
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}
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}
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void Logger::removeDestination(Destination* destination)
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{
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d->destList.removeAll(destination);
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}
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} // end namespace
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