78 lines
2 KiB
C++
78 lines
2 KiB
C++
#include <psemek/log/log.hpp>
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#include <chrono>
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#include <ctime>
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#include <iostream>
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#include <sstream>
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#include <iomanip>
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#include <mutex>
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#include <unordered_map>
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#include <thread>
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namespace psemek::log
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{
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static int max_thread_name_length = 5;
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void set_max_thread_name_length(int length)
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{
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max_thread_name_length = length;
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}
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static std::unordered_map<std::thread::id, std::string> thread_names;
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void register_thread(std::string name)
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{
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register_thread(std::this_thread::get_id(), std::move(name));
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}
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void register_thread(std::thread::id id, std::string name)
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{
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auto it = thread_names.find(id);
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if (it != thread_names.end())
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throw std::runtime_error("Thread \"" + name + "\" already registered!");
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if (name.size() > max_thread_name_length)
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throw std::runtime_error("Thread \"" + name + "\" name is too long");
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thread_names[id] = name;
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put_message(level::info, "Thread \"" + name + "\" registered");
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}
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static ::tm safe_localtime(std::time_t const & time)
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{
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static std::mutex mutex;
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std::lock_guard lock{mutex};
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return *std::localtime(&time);
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}
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void put_message(level l, std::string const & message)
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{
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static std::string unknown_thread_name = "???";
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using clock = std::chrono::system_clock;
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auto const time = clock::to_time_t(clock::now());
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auto const tm = safe_localtime(time);
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auto const millis = std::chrono::duration_cast<std::chrono::milliseconds>(clock::now().time_since_epoch()).count() % 1000;
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auto const id = std::this_thread::get_id();
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auto const it = thread_names.find(id);
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auto const & thread_name = (it == thread_names.end()) ? unknown_thread_name : it->second;
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std::ostringstream os;
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os
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<< '[' << std::put_time(&tm, "%Y %b %d %H:%M:%S.") << std::setw(3) << std::setfill('0') << millis << ']'
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<< '[' << std::setw(max_thread_name_length) << std::setfill(' ') << thread_name << ']'
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<< '[' << std::setw(7) << l << ']'
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<< ' ' << message;
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static std::mutex cout_mutex;
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std::lock_guard lock{cout_mutex};
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std::cout << os.str() << std::endl;
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}
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}
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