mirror of
https://github.com/zerotier/ZeroTierOne.git
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91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
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/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2012-2013 ZeroTier Networks LLC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#ifndef _ZT_LOGGER_HPP
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#define _ZT_LOGGER_HPP
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#include <stdio.h>
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#include <string>
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#include <stdexcept>
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#include "NonCopyable.hpp"
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#include "Mutex.hpp"
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#undef LOG
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#define LOG(f,...) if (_r->log) _r->log->log(f,##__VA_ARGS__)
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#undef TRACE
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#ifdef ZT_TRACE
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#define TRACE(f,...) if (_r->log) _r->log->trace(__FILE__,__LINE__,f,##__VA_ARGS__)
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#else
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#define TRACE(f,...) {}
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#endif
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namespace ZeroTier {
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/**
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* Utility for outputting logs to a file or stdout/stderr
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*/
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class Logger : NonCopyable
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{
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public:
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/**
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* Construct a logger to log to a file or stdout
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*
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* If a path is supplied to log to a file, maxLogSize indicates the size
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* at which this file is closed, renamed to .old, and then a new log is
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* opened (essentially a log rotation). If stdout is used, this is ignored.
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*
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* @param p Path to log to or NULL to use stdout
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* @param prefix Prefix to prepend to log lines or NULL for none
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* @param maxLogSize Maximum log size (0 for no limit)
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*/
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Logger(const char *p,const char *prefix,unsigned long maxLogSize);
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~Logger();
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void log(const char *fmt,...);
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#ifdef ZT_TRACE
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void trace(const char *module,unsigned int line,const char *fmt,...);
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#else
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inline void trace(const char *module,unsigned int line,const char *fmt,...) {}
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#endif
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private:
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void _rotateIfNeeded();
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std::string _path;
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std::string _prefix;
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unsigned long _maxLogSize;
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Mutex _log_m;
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FILE *_log;
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};
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} // namespace ZeroTier
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#endif
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