107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
/*
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Copyright (c) 2003, Arvid Norberg
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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_DEBUG_HPP_INCLUDED
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#define TORRENT_DEBUG_HPP_INCLUDED
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#include <string>
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#include "libtorrent/config.hpp"
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#include "libtorrent/file.hpp"
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#include "libtorrent/thread.hpp"
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#if TORRENT_USE_IOSTREAM
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#include <fstream>
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#include <iostream>
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#endif
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namespace libtorrent
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{
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// DEBUG API
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#if TORRENT_USE_IOSTREAM
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// all log streams share a single file descriptor
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// and re-opens the file for each log line
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static std::ofstream log_file;
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static std::string open_filename;
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static mutex file_mutex;
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#endif
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struct logger
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{
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logger(std::string const& logpath, std::string const& filename
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, int instance, bool append)
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{
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char log_name[512];
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snprintf(log_name, sizeof(log_name), "libtorrent_logs%d", instance);
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std::string dir(complete(combine_path(logpath, log_name)));
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error_code ec;
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if (!exists(dir)) create_directories(dir, ec);
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m_filename = combine_path(dir, filename);
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m_truncate = !append;
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*this << "\n\n\n*** starting log ***\n";
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}
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#if TORRENT_USE_IOSTREAM
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void open()
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{
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if (open_filename == m_filename) return;
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log_file.close();
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log_file.clear();
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log_file.open(m_filename.c_str(), m_truncate ? std::ios_base::trunc : std::ios_base::app);
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open_filename = m_filename;
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m_truncate = false;
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if (!log_file.good())
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fprintf(stderr, "Failed to open logfile %s: %s\n", m_filename.c_str(), strerror(errno));
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}
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#endif
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template <class T>
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logger& operator<<(T const& v)
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{
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#if TORRENT_USE_IOSTREAM
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mutex::scoped_lock l(file_mutex);
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open();
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log_file << v;
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log_file.flush();
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#endif
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return *this;
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}
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std::string m_filename;
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bool m_truncate;
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};
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}
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#endif // TORRENT_DEBUG_HPP_INCLUDED
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