154 lines
3.3 KiB
C++
154 lines
3.3 KiB
C++
/*
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Copyright (c) 2006-2012, Arvid Norberg & Daniel Wallin
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_LOGGING_HPP
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#define TORRENT_LOGGING_HPP
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#include "libtorrent/config.hpp"
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#if TORRENT_USE_IOSTREAM
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#include <iostream>
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#include <fstream>
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#include "libtorrent/ptime.hpp"
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namespace libtorrent { namespace dht
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{
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class log
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{
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public:
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log(char const* id, std::ostream& stream)
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: m_id(id)
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, m_enabled(true)
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, m_stream(stream)
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{
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}
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char const* id() const
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{
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return m_id;
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}
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bool enabled() const
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{
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return m_enabled;
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}
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void enable(bool e)
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{
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m_enabled = e;
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}
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void flush() { m_stream.flush(); }
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template<class T>
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log& operator<<(T const& x)
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{
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m_stream << x;
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return *this;
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}
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private:
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char const* m_id;
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bool m_enabled;
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std::ostream& m_stream;
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};
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class log_event
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{
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public:
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log_event(log& log)
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: log_(log)
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{
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if (log_.enabled())
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log_ << time_now_string() << " [" << log.id() << "] ";
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}
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~log_event()
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{
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if (log_.enabled())
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{
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log_ << "\n";
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log_.flush();
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}
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}
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template<class T>
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log_event& operator<<(T const& x)
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{
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log_ << x;
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return *this;
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}
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operator bool() const
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{
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return log_.enabled();
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}
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private:
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log& log_;
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};
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class inverted_log_event : public log_event
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{
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public:
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inverted_log_event(log& log) : log_event(log) {}
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operator bool() const
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{
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return !log_event::operator bool();
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}
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};
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} } // namespace libtorrent::dht
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#define TORRENT_DECLARE_LOG(name) \
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libtorrent::dht::log& name ## _log()
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#define TORRENT_DEFINE_LOG(name) \
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libtorrent::dht::log& name ## _log() \
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{ \
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static std::ofstream log_file("dht.log", std::ios::app); \
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static libtorrent::dht::log instance(#name, log_file); \
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return instance; \
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}
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#define TORRENT_LOG(name) \
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if (libtorrent::dht::inverted_log_event event_object__ = name ## _log()); \
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else static_cast<log_event&>(event_object__)
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#endif // TORRENT_USE_IOSTREAM
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#endif
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