380 lines
13 KiB
C
380 lines
13 KiB
C
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// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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#pragma once
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// Thread safe logger (except for set_error_handler())
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// Has name, log level, vector of std::shared sink pointers and formatter
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// Upon each log write the logger:
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// 1. Checks if its log level is enough to log the message and if yes:
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// 2. Call the underlying sinks to do the job.
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// 3. Each sink use its own private copy of a formatter to format the message
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// and send to its destination.
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//
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// The use of private formatter per sink provides the opportunity to cache some
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// formatted data, and support for different format per sink.
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#include <spdlog/common.h>
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#include <spdlog/details/backtracer.h>
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#include <spdlog/details/log_msg.h>
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#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
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#ifndef _WIN32
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#error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
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#endif
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#include <spdlog/details/os.h>
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#endif
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#include <vector>
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#ifndef SPDLOG_NO_EXCEPTIONS
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#define SPDLOG_LOGGER_CATCH(location) \
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catch (const std::exception &ex) { \
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if (location.filename) { \
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err_handler_(fmt_lib::format(SPDLOG_FMT_STRING("{} [{}({})]"), ex.what(), \
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location.filename, location.line)); \
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} else { \
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err_handler_(ex.what()); \
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} \
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} \
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catch (...) { \
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err_handler_("Rethrowing unknown exception in logger"); \
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throw; \
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}
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#else
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#define SPDLOG_LOGGER_CATCH(location)
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#endif
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namespace spdlog {
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class SPDLOG_API logger {
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public:
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// Empty logger
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explicit logger(std::string name)
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: name_(std::move(name)),
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sinks_() {}
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// Logger with range on sinks
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template <typename It>
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logger(std::string name, It begin, It end)
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: name_(std::move(name)),
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sinks_(begin, end) {}
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// Logger with single sink
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logger(std::string name, sink_ptr single_sink)
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: logger(std::move(name), {std::move(single_sink)}) {}
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// Logger with sinks init list
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logger(std::string name, sinks_init_list sinks)
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: logger(std::move(name), sinks.begin(), sinks.end()) {}
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virtual ~logger() = default;
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logger(const logger &other);
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logger(logger &&other) SPDLOG_NOEXCEPT;
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logger &operator=(logger other) SPDLOG_NOEXCEPT;
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void swap(spdlog::logger &other) SPDLOG_NOEXCEPT;
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template <typename... Args>
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void log(source_loc loc, level::level_enum lvl, format_string_t<Args...> fmt, Args &&...args) {
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log_(loc, lvl, details::to_string_view(fmt), std::forward<Args>(args)...);
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}
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template <typename... Args>
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void log(level::level_enum lvl, format_string_t<Args...> fmt, Args &&...args) {
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log(source_loc{}, lvl, fmt, std::forward<Args>(args)...);
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}
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template <typename T>
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void log(level::level_enum lvl, const T &msg) {
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log(source_loc{}, lvl, msg);
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}
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// T cannot be statically converted to format string (including string_view/wstring_view)
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template <class T,
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typename std::enable_if<!is_convertible_to_any_format_string<const T &>::value,
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int>::type = 0>
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void log(source_loc loc, level::level_enum lvl, const T &msg) {
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log(loc, lvl, "{}", msg);
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}
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void log(log_clock::time_point log_time,
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source_loc loc,
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level::level_enum lvl,
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string_view_t msg) {
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bool log_enabled = should_log(lvl);
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bool traceback_enabled = tracer_.enabled();
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if (!log_enabled && !traceback_enabled) {
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return;
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}
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details::log_msg log_msg(log_time, loc, name_, lvl, msg);
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log_it_(log_msg, log_enabled, traceback_enabled);
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}
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void log(source_loc loc, level::level_enum lvl, string_view_t msg) {
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bool log_enabled = should_log(lvl);
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bool traceback_enabled = tracer_.enabled();
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if (!log_enabled && !traceback_enabled) {
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return;
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}
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details::log_msg log_msg(loc, name_, lvl, msg);
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log_it_(log_msg, log_enabled, traceback_enabled);
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}
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void log(level::level_enum lvl, string_view_t msg) { log(source_loc{}, lvl, msg); }
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template <typename... Args>
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void trace(format_string_t<Args...> fmt, Args &&...args) {
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log(level::trace, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void debug(format_string_t<Args...> fmt, Args &&...args) {
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log(level::debug, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void info(format_string_t<Args...> fmt, Args &&...args) {
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log(level::info, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void warn(format_string_t<Args...> fmt, Args &&...args) {
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log(level::warn, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void error(format_string_t<Args...> fmt, Args &&...args) {
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log(level::err, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void critical(format_string_t<Args...> fmt, Args &&...args) {
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log(level::critical, fmt, std::forward<Args>(args)...);
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}
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#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
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template <typename... Args>
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void log(source_loc loc, level::level_enum lvl, wformat_string_t<Args...> fmt, Args &&...args) {
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log_(loc, lvl, details::to_string_view(fmt), std::forward<Args>(args)...);
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}
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template <typename... Args>
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void log(level::level_enum lvl, wformat_string_t<Args...> fmt, Args &&...args) {
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log(source_loc{}, lvl, fmt, std::forward<Args>(args)...);
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}
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void log(log_clock::time_point log_time,
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source_loc loc,
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level::level_enum lvl,
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wstring_view_t msg) {
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bool log_enabled = should_log(lvl);
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bool traceback_enabled = tracer_.enabled();
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if (!log_enabled && !traceback_enabled) {
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return;
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}
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memory_buf_t buf;
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details::os::wstr_to_utf8buf(wstring_view_t(msg.data(), msg.size()), buf);
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details::log_msg log_msg(log_time, loc, name_, lvl, string_view_t(buf.data(), buf.size()));
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log_it_(log_msg, log_enabled, traceback_enabled);
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}
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void log(source_loc loc, level::level_enum lvl, wstring_view_t msg) {
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bool log_enabled = should_log(lvl);
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bool traceback_enabled = tracer_.enabled();
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if (!log_enabled && !traceback_enabled) {
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return;
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}
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memory_buf_t buf;
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details::os::wstr_to_utf8buf(wstring_view_t(msg.data(), msg.size()), buf);
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details::log_msg log_msg(loc, name_, lvl, string_view_t(buf.data(), buf.size()));
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log_it_(log_msg, log_enabled, traceback_enabled);
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}
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void log(level::level_enum lvl, wstring_view_t msg) { log(source_loc{}, lvl, msg); }
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template <typename... Args>
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void trace(wformat_string_t<Args...> fmt, Args &&...args) {
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log(level::trace, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void debug(wformat_string_t<Args...> fmt, Args &&...args) {
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log(level::debug, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void info(wformat_string_t<Args...> fmt, Args &&...args) {
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log(level::info, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void warn(wformat_string_t<Args...> fmt, Args &&...args) {
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log(level::warn, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void error(wformat_string_t<Args...> fmt, Args &&...args) {
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log(level::err, fmt, std::forward<Args>(args)...);
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}
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template <typename... Args>
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void critical(wformat_string_t<Args...> fmt, Args &&...args) {
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log(level::critical, fmt, std::forward<Args>(args)...);
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}
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#endif
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template <typename T>
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void trace(const T &msg) {
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log(level::trace, msg);
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}
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template <typename T>
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void debug(const T &msg) {
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log(level::debug, msg);
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}
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template <typename T>
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void info(const T &msg) {
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log(level::info, msg);
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}
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template <typename T>
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void warn(const T &msg) {
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log(level::warn, msg);
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}
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template <typename T>
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void error(const T &msg) {
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log(level::err, msg);
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}
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template <typename T>
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void critical(const T &msg) {
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log(level::critical, msg);
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}
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// return true logging is enabled for the given level.
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bool should_log(level::level_enum msg_level) const {
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return msg_level >= level_.load(std::memory_order_relaxed);
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}
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// return true if backtrace logging is enabled.
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bool should_backtrace() const { return tracer_.enabled(); }
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void set_level(level::level_enum log_level);
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level::level_enum level() const;
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const std::string &name() const;
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// set formatting for the sinks in this logger.
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// each sink will get a separate instance of the formatter object.
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void set_formatter(std::unique_ptr<formatter> f);
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// set formatting for the sinks in this logger.
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// equivalent to
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// set_formatter(make_unique<pattern_formatter>(pattern, time_type))
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// Note: each sink will get a new instance of a formatter object, replacing the old one.
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void set_pattern(std::string pattern, pattern_time_type time_type = pattern_time_type::local);
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// backtrace support.
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// efficiently store all debug/trace messages in a circular buffer until needed for debugging.
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void enable_backtrace(size_t n_messages);
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void disable_backtrace();
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void dump_backtrace();
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// flush functions
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void flush();
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void flush_on(level::level_enum log_level);
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level::level_enum flush_level() const;
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// sinks
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const std::vector<sink_ptr> &sinks() const;
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std::vector<sink_ptr> &sinks();
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// error handler
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void set_error_handler(err_handler);
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// create new logger with same sinks and configuration.
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virtual std::shared_ptr<logger> clone(std::string logger_name);
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protected:
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std::string name_;
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std::vector<sink_ptr> sinks_;
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spdlog::level_t level_{level::info};
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spdlog::level_t flush_level_{level::off};
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err_handler custom_err_handler_{nullptr};
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details::backtracer tracer_;
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// common implementation for after templated public api has been resolved
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template <typename... Args>
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void log_(source_loc loc, level::level_enum lvl, string_view_t fmt, Args &&...args) {
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bool log_enabled = should_log(lvl);
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bool traceback_enabled = tracer_.enabled();
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if (!log_enabled && !traceback_enabled) {
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return;
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}
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SPDLOG_TRY {
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memory_buf_t buf;
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#ifdef SPDLOG_USE_STD_FORMAT
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fmt_lib::vformat_to(std::back_inserter(buf), fmt, fmt_lib::make_format_args(args...));
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#else
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fmt::vformat_to(fmt::appender(buf), fmt, fmt::make_format_args(args...));
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#endif
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details::log_msg log_msg(loc, name_, lvl, string_view_t(buf.data(), buf.size()));
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log_it_(log_msg, log_enabled, traceback_enabled);
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}
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SPDLOG_LOGGER_CATCH(loc)
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}
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#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
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template <typename... Args>
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void log_(source_loc loc, level::level_enum lvl, wstring_view_t fmt, Args &&...args) {
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bool log_enabled = should_log(lvl);
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bool traceback_enabled = tracer_.enabled();
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if (!log_enabled && !traceback_enabled) {
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return;
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}
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SPDLOG_TRY {
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// format to wmemory_buffer and convert to utf8
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wmemory_buf_t wbuf;
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fmt_lib::vformat_to(std::back_inserter(wbuf), fmt,
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fmt_lib::make_format_args<fmt_lib::wformat_context>(args...));
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memory_buf_t buf;
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details::os::wstr_to_utf8buf(wstring_view_t(wbuf.data(), wbuf.size()), buf);
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details::log_msg log_msg(loc, name_, lvl, string_view_t(buf.data(), buf.size()));
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log_it_(log_msg, log_enabled, traceback_enabled);
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}
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SPDLOG_LOGGER_CATCH(loc)
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}
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#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
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// log the given message (if the given log level is high enough),
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|
|
// and save backtrace (if backtrace is enabled).
|
||
|
|
void log_it_(const details::log_msg &log_msg, bool log_enabled, bool traceback_enabled);
|
||
|
|
virtual void sink_it_(const details::log_msg &msg);
|
||
|
|
virtual void flush_();
|
||
|
|
void dump_backtrace_();
|
||
|
|
bool should_flush_(const details::log_msg &msg);
|
||
|
|
|
||
|
|
// handle errors during logging.
|
||
|
|
// default handler prints the error to stderr at max rate of 1 message/sec.
|
||
|
|
void err_handler_(const std::string &msg);
|
||
|
|
};
|
||
|
|
|
||
|
|
void swap(logger &a, logger &b);
|
||
|
|
|
||
|
|
} // namespace spdlog
|
||
|
|
|
||
|
|
#ifdef SPDLOG_HEADER_ONLY
|
||
|
|
#include "logger-inl.h"
|
||
|
|
#endif
|