transmission/libtransmission/log.h

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// This file Copyright © 2010-2023 Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#pragma once
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#include <cstddef>
#include <ctime>
#include <optional>
#include <string>
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#include <string_view>
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// ---
enum tr_log_level
{
// No logging at all
TR_LOG_OFF,
// Errors that prevent Transmission from running
TR_LOG_CRITICAL,
// Errors that could prevent a single torrent from running, e.g. missing
// files or a private torrent's tracker responding "unregistered torrent"
TR_LOG_ERROR,
// Smaller errors that don't stop the overall system,
// e.g. unable to preallocate a file, or unable to connect to a tracker
// when other trackers are available
TR_LOG_WARN,
// User-visible info, e.g. "torrent completed" or "running script"
TR_LOG_INFO,
// Debug messages
TR_LOG_DEBUG,
// High-volume debug messages, e.g. tracing peer protocol messages
TR_LOG_TRACE
};
std::optional<tr_log_level> tr_logGetLevelFromKey(std::string_view key);
// ---
struct tr_log_message
{
tr_log_level level;
// location in the source code
std::string_view file;
long line;
// when the message was generated
time_t when;
// torrent name or code module name associated with the message
std::string name;
// the message
std::string message;
// linked list of messages
struct tr_log_message* next;
};
// ---
#define TR_LOG_MAX_QUEUE_LENGTH 10000
[[nodiscard]] bool tr_logGetQueueEnabled();
void tr_logSetQueueEnabled(bool is_enabled);
[[nodiscard]] tr_log_message* tr_logGetQueue();
void tr_logFreeQueue(tr_log_message* freeme);
// ---
void tr_logSetLevel(tr_log_level);
[[nodiscard]] tr_log_level tr_logGetLevel();
[[nodiscard]] bool tr_logLevelIsActive(tr_log_level level);
// ---
void tr_logAddMessage(
char const* source_file,
long source_line,
tr_log_level level,
std::string_view msg,
std::string_view module_name = {});
#define tr_logAddLevel(level, ...) \
do \
{ \
if (tr_logLevelIsActive(level)) \
{ \
tr_logAddMessage(__FILE__, __LINE__, level, __VA_ARGS__); \
} \
} while (0)
#define tr_logAddCritical(...) tr_logAddLevel(TR_LOG_CRITICAL, __VA_ARGS__)
#define tr_logAddError(...) tr_logAddLevel(TR_LOG_ERROR, __VA_ARGS__)
#define tr_logAddWarn(...) tr_logAddLevel(TR_LOG_WARN, __VA_ARGS__)
#define tr_logAddInfo(...) tr_logAddLevel(TR_LOG_INFO, __VA_ARGS__)
#define tr_logAddDebug(...) tr_logAddLevel(TR_LOG_DEBUG, __VA_ARGS__)
#define tr_logAddTrace(...) tr_logAddLevel(TR_LOG_TRACE, __VA_ARGS__)
// ---
char* tr_logGetTimeStr(char* buf, size_t buflen);