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Merge 43ecacfce73a049c5a667a100658522f6778bcbd into dc45cd78595c7c24c8a8574c63bb48b5bb99c5aa
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a96303fcf2
35
examples/c++/logger.cxx
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35
examples/c++/logger.cxx
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#include <thread>
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#include <vector>
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#include "upm_logger.hpp"
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using namespace upm;
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void print()
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{
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UPM_LOG(LOG_DEBUG) << "Thread " << std::this_thread::get_id() << ": running loop with 3 iterations";
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for (int i = 0; i < 4; ++i) {
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UPM_LOG(LOG_DEBUG) << std::this_thread::get_id() << ": i = " << i;
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}
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}
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int main()
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{
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std::vector<std::thread> threads;
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UPM_LOGGER::LogLevel() = LOG_INFO;
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UPM_LOG(LOG_WARNING) << "Testing the upm logger";
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// Launching 5 threads
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for (int i = 0; i < 5; ++i) {
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threads.push_back(std::thread(print));
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}
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for (auto& thread : threads) {
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thread.join();
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}
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return 0;
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}
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131
include/upm_logger.hpp
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include/upm_logger.hpp
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/*
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* Author: Mihai Stefanescu <mihai.stefanescu@rinftech.com>
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* Copyright (c) 2018 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <sstream>
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#include <fstream>
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#include <string>
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#include <chrono>
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#include <thread>
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#include <mutex>
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/* Helper macro for logger utility class. */
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#define UPM_LOG(log_level) \
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if ( log_level < UPM_LOGGER::LogLevel() ) \
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; \
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else \
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UPM_LOGGER().log(log_level) << __FILE__ << " " \
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<< __FUNCTION__ << " " \
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<< __LINE__ << ": "
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#define LOG_FILE "/var/log/upm.log"
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namespace upm {
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enum UpmLogLevel {
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LOG_ERROR,
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LOG_WARNING,
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LOG_INFO,
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LOG_DEBUG,
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NA
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};
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static const std::string logLevelNames[] = {
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"ERROR",
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"WARNING",
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"INFO",
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"DEBUG",
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""
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};
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class UPM_LOGGER {
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public:
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UPM_LOGGER() {}
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virtual ~UPM_LOGGER();
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std::ostringstream& log(UpmLogLevel level = LOG_ERROR);
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static UpmLogLevel& LogLevel();
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protected:
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std::ostringstream os;
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private:
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UPM_LOGGER(const UPM_LOGGER&);
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UPM_LOGGER& operator=(const UPM_LOGGER&);
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private:
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// Track logLevel for this particular instance of UPM_LOGGER
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UpmLogLevel logLevel;
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std::ofstream logStream;
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static std::mutex logMutex;
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public:
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static const std::string& getLogLevelName(UpmLogLevel level);
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private:
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void write(std::ostringstream& os);
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};
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std::mutex UPM_LOGGER::logMutex;
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void UPM_LOGGER::write(std::ostringstream& os)
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{
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std::lock_guard<std::mutex> lock(logMutex);
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logStream.open(LOG_FILE, std::ios_base::app);
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logStream << os.str();
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logStream.flush();
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}
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const std::string& UPM_LOGGER::getLogLevelName(UpmLogLevel level)
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{
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if (level < LOG_ERROR || level >= NA) {
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return NULL;
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}
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return logLevelNames[level];
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}
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UpmLogLevel& UPM_LOGGER::LogLevel()
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{
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static UpmLogLevel reportingLevel = LOG_DEBUG;
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return reportingLevel;
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}
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std::ostringstream& UPM_LOGGER::log(UpmLogLevel level)
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{
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using namespace std::chrono;
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os << "UPM - " << duration_cast<nanoseconds>
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(system_clock::now().time_since_epoch()).count();
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os << " " << getLogLevelName(level) << " ";
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logLevel = level;
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return os;
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}
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UPM_LOGGER::~UPM_LOGGER()
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{
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os << std::endl;
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write(os);
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}
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}
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