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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2018, Google Inc.
*
* log.h - Logging infrastructure
*/
#ifndef __LIBCAMERA_LOG_H__
#define __LIBCAMERA_LOG_H__
#include <sstream>
namespace libcamera {
enum LogSeverity {
LogDebug,
LogInfo,
LogWarning,
LogError,
LogFatal,
};
class LogCategory
{
public:
explicit LogCategory(const char *name);
~LogCategory();
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)() \
{ \
static LogCategory category(#name); \
return category; \
}
class LogMessage
{
public:
LogMessage(const char *fileName, unsigned int line,
LogSeverity severity);
LogMessage(const char *fileName, unsigned int line,
const LogCategory &category, LogSeverity severity);
LogMessage(const LogMessage &) = delete;
LogMessage(LogMessage &&);
~LogMessage();
std::ostream &stream() { return msgStream_; }
private:
void init(const char *fileName, unsigned int line);
std::ostringstream msgStream_;
const LogCategory &category_;
LogSeverity severity_;
};
class Loggable
{
public:
virtual ~Loggable();
protected:
virtual std::string logPrefix() const = 0;
LogMessage _log(const char *file, unsigned int line,
LogSeverity severity);
LogMessage _log(const char *file, unsigned int line,
const LogCategory &category, LogSeverity severity);
};
LogMessage _log(const char *file, unsigned int line, LogSeverity severity);
LogMessage _log(const char *file, unsigned int line,
const LogCategory &category, LogSeverity severity);
#ifndef __DOXYGEN__
#define _LOG_CATEGORY(name) logCategory##name
#define _LOG1(severity) \
_log(__FILE__, __LINE__, Log##severity).stream()
#define _LOG2(category, severity) \
_log(__FILE__, __LINE__, _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"; \
}))
#else
#define ASSERT(condition) static_cast<void>(false && (condition))
#endif
} /* namespace libcamera */
#endif /* __LIBCAMERA_LOG_H__ */
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