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/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
Her Majesty the Queen in Right of Canada (Communications Research
Center Canada)
Copyright (C) 2018
Matthias P. Braendli, matthias.braendli@mpb.li
http://www.opendigitalradio.org
*/
/*
This file is part of the ODR-mmbTools.
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <list>
#include <cstdarg>
#include <cinttypes>
#include <chrono>
#include "Log.h"
using namespace std;
Logger::Logger()
{
m_io_thread = std::thread(&Logger::io_process, this);
}
Logger::~Logger() {
m_message_queue.trigger_wakeup();
m_io_thread.join();
std::lock_guard<std::mutex> guard(m_backend_mutex);
backends.clear();
}
void Logger::register_backend(std::shared_ptr<LogBackend> backend)
{
std::lock_guard<std::mutex> guard(m_backend_mutex);
backends.push_back(backend);
}
void Logger::log(log_level_t level, const char* fmt, ...)
{
if (level == discard) {
return;
}
int size = 100;
std::string str;
va_list ap;
while (1) {
str.resize(size);
va_start(ap, fmt);
int n = vsnprintf((char *)str.c_str(), size, fmt, ap);
va_end(ap);
if (n > -1 && n < size) {
str.resize(n);
break;
}
if (n > -1)
size = n + 1;
else
size *= 2;
}
logstr(level, move(str));
}
void Logger::logstr(log_level_t level, std::string&& message)
{
if (level == discard) {
return;
}
log_message_t m(level, move(message));
m_message_queue.push(move(m));
}
void Logger::io_process()
{
while (1) {
log_message_t m;
try {
m_message_queue.wait_and_pop(m);
}
catch (const ThreadsafeQueueWakeup&) {
break;
}
auto message = m.message;
/* Remove a potential trailing newline.
* It doesn't look good in syslog
*/
if (message[message.length()-1] == '\n') {
message.resize(message.length()-1);
}
{
std::lock_guard<std::mutex> guard(m_backend_mutex);
for (auto &backend : backends) {
backend->log(m.level, message);
}
if (m.level != log_level_t::trace) {
std::cerr << levels_as_str[m.level] << " " << message << std::endl;
}
}
}
}
LogLine Logger::level(log_level_t level)
{
return LogLine(this, level);
}
LogToFile::LogToFile(const std::string& filename) : name("FILE")
{
FILE* fd = fopen(filename.c_str(), "a");
if (fd == nullptr) {
fprintf(stderr, "Cannot open log file !");
throw std::runtime_error("Cannot open log file !");
}
log_file.reset(fd);
}
void LogToFile::log(log_level_t level, const std::string& message)
{
if (not (level == log_level_t::trace or level == log_level_t::discard)) {
const char* log_level_text[] = {
"DEBUG", "INFO", "WARN", "ERROR", "ALERT", "EMERG"};
// fprintf is thread-safe
fprintf(log_file.get(), SYSLOG_IDENT ": %s: %s\n",
log_level_text[(size_t)level], message.c_str());
fflush(log_file.get());
}
}
void LogToSyslog::log(log_level_t level, const std::string& message)
{
if (not (level == log_level_t::trace or level == log_level_t::discard)) {
int syslog_level = LOG_EMERG;
switch (level) {
case debug: syslog_level = LOG_DEBUG; break;
case info: syslog_level = LOG_INFO; break;
/* we don't have the notice level */
case warn: syslog_level = LOG_WARNING; break;
case error: syslog_level = LOG_ERR; break;
default: syslog_level = LOG_CRIT; break;
case alert: syslog_level = LOG_ALERT; break;
case emerg: syslog_level = LOG_EMERG; break;
}
syslog(syslog_level, SYSLOG_IDENT " %s", message.c_str());
}
}
LogTracer::LogTracer(const string& trace_filename) : name("TRACE")
{
etiLog.level(info) << "Setting up TRACE to " << trace_filename;
FILE* fd = fopen(trace_filename.c_str(), "a");
if (fd == nullptr) {
fprintf(stderr, "Cannot open trace file !");
throw std::runtime_error("Cannot open trace file !");
}
m_trace_file.reset(fd);
using namespace std::chrono;
auto now = steady_clock::now().time_since_epoch();
m_trace_micros_startup = duration_cast<microseconds>(now).count();
fprintf(m_trace_file.get(),
"0,TRACER,startup at %" PRIu64 "\n", m_trace_micros_startup);
}
void LogTracer::log(log_level_t level, const std::string& message)
{
if (level == log_level_t::trace) {
using namespace std::chrono;
const auto now = steady_clock::now().time_since_epoch();
const auto micros = duration_cast<microseconds>(now).count();
fprintf(m_trace_file.get(), "%" PRIu64 ",%s\n",
micros - m_trace_micros_startup,
message.c_str());
}
}
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