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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2018, Google Inc.
*
* log.h - Logging infrastructure
*/
#pragma once
#include <chrono>
#include <sstream>
#include <libcamera/base/private.h>
#include <libcamera/base/class.h>
#include <libcamera/base/utils.h>
namespace libcamera {
enum LogSeverity {
LogInvalid = -1,
LogDebug = 0,
LogInfo,
LogWarning,
LogError,
LogFatal,
};
class LogCategory
{
public:
explicit LogCategory(const char *name);
const char *name() const { return name_; }
LogSeverity severity() const { return severity_; }
void setSeverity(LogSeverity severity);
static const LogCategory &defaultCategory();
private:
const char *name_;
LogSeverity severity_;
};
#define LOG_DECLARE_CATEGORY(name) \
extern const LogCategory &_LOG_CATEGORY(name)();
#define LOG_DEFINE_CATEGORY(name) \
const LogCategory &_LOG_CATEGORY(name)() \
{ \
/* The instance will be deleted by the Logger destructor. */ \
static LogCategory *category = new LogCategory(#name); \
return *category; \
}
class LogMessage
{
public:
LogMessage(const char *fileName, unsigned int line,
const LogCategory &category, LogSeverity severity,
const std::string &prefix = std::string());
LogMessage(LogMessage &&);
~LogMessage();
std::ostream &stream() { return msgStream_; }
const utils::time_point ×tamp() const { return timestamp_; }
LogSeverity severity() const { return severity_; }
const LogCategory &category() const { return category_; }
const std::string &fileInfo() const { return fileInfo_; }
const std::string &prefix() const { return prefix_; }
const std::string msg() const { return msgStream_.str(); }
private:
LIBCAMERA_DISABLE_COPY(LogMessage)
void init(const char *fileName, unsigned int line);
std::ostringstream msgStream_;
const LogCategory &category_;
LogSeverity severity_;
utils::time_point timestamp_;
std::string fileInfo_;
std::string prefix_;
};
class Loggable
{
public:
virtual ~Loggable();
protected:
virtual std::string logPrefix() const = 0;
LogMessage _log(const LogCategory *category, LogSeverity severity,
const char *fileName = __builtin_FILE(),
unsigned int line = __builtin_LINE()) const;
};
LogMessage _log(const LogCategory *category, LogSeverity severity,
const char *fileName = __builtin_FILE(),
unsigned int line = __builtin_LINE());
#ifndef __DOXYGEN__
#define _LOG_CATEGORY(name) logCategory##name
#define _LOG1(severity) \
_log(nullptr, Log##severity).stream()
#define _LOG2(category, severity) \
_log(&_LOG_CATEGORY(category)(), Log##severity).stream()
/*
* Expand the LOG() macro to _LOG1() or _LOG2() based on the number of
* arguments.
*/
#define _LOG_MACRO(_1, _2, NAME, ...) NAME
#define LOG(...) _LOG_MACRO(__VA_ARGS__, _LOG2, _LOG1)(__VA_ARGS__)
#else /* __DOXYGEN___ */
#define LOG(category, severity)
#endif /* __DOXYGEN__ */
#ifndef NDEBUG
#define ASSERT(condition) static_cast<void>(({ \
if (!(condition)) \
LOG(Fatal) << "assertion \"" #condition "\" failed in " \
<< __func__ << "()"; \
}))
#else
#define ASSERT(condition) static_cast<void>(false && (condition))
#endif
} /* namespace libcamera */
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