aka_error.hh
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Created: Sun, Apr 28, 12:27

aka_error.hh
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	/**
	* @file aka_error.hh
	*
	* @author Nicolas Richart <nicolas.richart@epfl.ch>
	*
	* @date creation: Mon Jun 14 2010
	* @date last modification: Tue Feb 20 2018
	*
	* @brief error management and internal exceptions
	*
	* @section LICENSE
	*
	* Copyright (©) 2010-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
	* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
	*
	* Akantu is free software: you can redistribute it and/or modify it under the
	* terms of the GNU Lesser General Public License as published by the Free
	* Software Foundation, either version 3 of the License, or (at your option) any
	* later version.
	*
	* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
	* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
	* details.
	*
	* You should have received a copy of the GNU Lesser General Public License
	* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
	*
	*/

	/* -------------------------------------------------------------------------- */
	#include <sstream>
	#include <typeinfo>
	#include <utility>
	#include <set>
	/* -------------------------------------------------------------------------- */

	/* -------------------------------------------------------------------------- */
	#ifndef __AKANTU_ERROR_HH__
	#define __AKANTU_ERROR_HH__

	namespace akantu {
	/* -------------------------------------------------------------------------- */
	enum DebugLevel {
	dbl0 = 0,
	dblError = 0,
	dblAssert = 0,
	dbl1 = 1,
	dblException = 1,
	dblCritical = 1,
	dbl2 = 2,
	dblMajor = 2,
	dbl3 = 3,
	dblCall = 3,
	dblSecondary = 3,
	dblHead = 3,
	dbl4 = 4,
	dblWarning = 4,
	dbl5 = 5,
	dblInfo = 5,
	dbl6 = 6,
	dblIn = 6,
	dblOut = 6,
	dbl7 = 7,
	dbl8 = 8,
	dblTrace = 8,
	dbl9 = 9,
	dblAccessory = 9,
	dbl10 = 10,
	dblDebug = 42,
	dbl100 = 100,
	dblDump = 100,
	dblTest = 1337
	};

	/* -------------------------------------------------------------------------- */
	#define AKANTU_LOCATION \
	"(" << __func__ << "(): " << __FILE__ << ":" << __LINE__ << ")"

	/* -------------------------------------------------------------------------- */
	namespace debug {
	void setDebugLevel(const DebugLevel & level);
	const DebugLevel & getDebugLevel();

	void initSignalHandler();
	std::string demangle(const char * symbol);
	std::string exec(const std::string & cmd);
	void printBacktrace(int sig);

	void exit(int status) __attribute__((noreturn));
	/* ------------------------------------------------------------------------ */
	/// exception class that can be thrown by akantu
	class Exception : public std::exception {
	/* ---------------------------------------------------------------------- */
	/* Constructors/Destructors */
	/* ---------------------------------------------------------------------- */
	protected:
	explicit Exception(std::string info = "")
	: _info(std::move(info)), _file("") {}

	public:
	//! full constructor
	Exception(std::string info, std::string file, unsigned int line)
	: _info(std::move(info)), _file(std::move(file)), _line(line) {}

	//! destructor
	~Exception() noexcept override = default;

	/* ---------------------------------------------------------------------- */
	/* Methods */
	/* ---------------------------------------------------------------------- */
	public:
	const char * what() const noexcept override { return _info.c_str(); }

	virtual const std::string info() const noexcept {
	std::stringstream stream;
	stream << debug::demangle(typeid(*this).name()) << " : " << _info << " ["
	<< _file << ":" << _line << "]";
	return stream.str();
	}

	public:
	void setInfo(const std::string & info) { _info = info; }
	void setFile(const std::string & file) { _file = file; }
	void setLine(unsigned int line) { _line = line; }
	/* ---------------------------------------------------------------------- */
	/* Class Members */
	/* ---------------------------------------------------------------------- */
	protected:
	/// exception description and additionals
	std::string _info;

	private:
	/// file it is thrown from
	std::string _file;

	/// ligne it is thrown from
	unsigned int _line{0};
	};

	class CriticalError : public Exception {};
	class AssertException : public Exception {};
	class NotImplementedException : public Exception {};

	/// standard output stream operator
	inline std::ostream & operator<<(std::ostream & stream,
	const Exception & _this) {
	stream << _this.what();
	return stream;
	}

	/* --------------------------------------------------------------------------
	*/
	class Debugger {
	public:
	Debugger();
	virtual ~Debugger();
	Debugger(const Debugger &) = default;
	Debugger & operator=(const Debugger &) = default;

	void exit(int status) __attribute__((noreturn));

	void throwException(const std::string & info, const std::string & file,
	unsigned int line, bool, const std::string &) const
	noexcept(false) __attribute__((noreturn));

	/----------------------------------------------------------------------- /
	template <class Except>
	void throwCustomException(const Except & ex, const std::string & info,
	const std::string & file, unsigned int line) const
	noexcept(false) __attribute__((noreturn));
	/----------------------------------------------------------------------- /
	template <class Except>
	void throwCustomException(const Except & ex, const std::string & file,
	unsigned int line) const noexcept(false)
	__attribute__((noreturn));

	void printMessage(const std::string & prefix, const DebugLevel & level,
	const std::string & info) const;

	void setOutStream(std::ostream & out) { cout = &out; }
	std::ostream & getOutStream() { return *cout; }

	public:
	void setParallelContext(int rank, int size);

	void setDebugLevel(const DebugLevel & level);
	const DebugLevel & getDebugLevel() const;

	void setLogFile(const std::string & filename);
	std::ostream & getOutputStream();

	inline bool testLevel(const DebugLevel & level,
	const std::string & module = "core") const {
	auto level_reached = (this->level >= (level));
	auto correct_module =
	(level <= dblCritical) or (modules_to_debug.size() == 0) or
	(modules_to_debug.find(module) != modules_to_debug.end());
	return level_reached and correct_module;
	}

	void printBacktrace(bool on_off) { this->print_backtrace = on_off; }
	bool printBacktrace() { return this->print_backtrace; }

	void addModuleToDebug(const std::string & id) {
	modules_to_debug.insert(id);
	}
	void removeModuleToDebug(const std::string & id) {
	auto it = modules_to_debug.find(id);
	if(it != modules_to_debug.end())
	modules_to_debug.erase(it);
	}
	private:
	std::string parallel_context;
	std::ostream * cout;
	bool file_open;
	DebugLevel level;
	bool print_backtrace;
	std::set<std::string> modules_to_debug;
	};

	extern Debugger debugger;
	} // namespace debug

	/* -------------------------------------------------------------------------- */
	#define AKANTU_STRINGIZE_(str) #str
	#define AKANTU_STRINGIZE(str) AKANTU_STRINGIZE_(str)
	/* -------------------------------------------------------------------------- */
	#define AKANTU_STRINGSTREAM_IN(_str, _sstr) \
	; \
	do { \
	std::stringstream _dbg_s_info; \
	_dbg_s_info << _sstr; \
	_str = _dbg_s_info.str(); \
	} while (false)

	/* -------------------------------------------------------------------------- */
	#define AKANTU_EXCEPTION(info) AKANTU_EXCEPTION_(info, false)

	#define AKANTU_SILENT_EXCEPTION(info) AKANTU_EXCEPTION_(info, true)

	#define AKANTU_EXCEPTION_(info, silent) \
	do { \
	std::stringstream _dbg_str; \
	_dbg_str << info; \
	std::stringstream _dbg_loc; \
	_dbg_loc << AKANTU_LOCATION; \
	::akantu::debug::debugger.throwException( \
	_dbg_str.str(), __FILE__, __LINE__, silent, _dbg_loc.str()); \
	} while (false)

	#define AKANTU_CUSTOM_EXCEPTION_INFO(ex, info) \
	do { \
	std::stringstream _dbg_str; \
	_dbg_str << info; \
	::akantu::debug::debugger.throwCustomException(ex, _dbg_str.str(), \
	__FILE__, __LINE__); \
	} while (false)

	#define AKANTU_CUSTOM_EXCEPTION(ex) \
	do { \
	::akantu::debug::debugger.throwCustomException(ex, __FILE__, __LINE__); \
	} while (false)

	/* -------------------------------------------------------------------------- */
	#ifdef AKANTU_NDEBUG
	#define AKANTU_DEBUG_TEST(level) (false)
	#define AKANTU_DEBUG_LEVEL_IS_TEST() \
	(::akantu::debug::debugger.testLevel(dblTest, AKANTU_STRINGIZE(AKANTU_MODULE)))
	#define AKANTU_DEBUG(level, info)
	#define AKANTU_DEBUG_(pref, level, info)
	#define AKANTU_DEBUG_IN()
	#define AKANTU_DEBUG_OUT()
	#define AKANTU_DEBUG_INFO(info)
	#define AKANTU_DEBUG_WARNING(info)
	#define AKANTU_DEBUG_TRACE(info)
	#define AKANTU_DEBUG_ASSERT(test, info)
	#define AKANTU_ERROR(info) \
	AKANTU_CUSTOM_EXCEPTION_INFO(::akantu::debug::CriticalError(), info)
	/* -------------------------------------------------------------------------- */
	#else
	#define AKANTU_DEBUG(level, info) AKANTU_DEBUG_(" ", level, info)

	#define AKANTU_DEBUG_(pref, level, info) \
	do { \
	std::string _dbg_str; \
	AKANTU_STRINGSTREAM_IN(_dbg_str, info << " " << AKANTU_LOCATION); \
	::akantu::debug::debugger.printMessage(pref, level, _dbg_str); \
	} while (false)

	#define AKANTU_DEBUG_TEST(level) \
	(::akantu::debug::debugger.testLevel(level, AKANTU_STRINGIZE(AKANTU_MODULE)))

	#define AKANTU_DEBUG_LEVEL_IS_TEST() \
	(::akantu::debug::debugger.testLevel(dblTest))

	#define AKANTU_DEBUG_IN() \
	AKANTU_DEBUG_("==>", ::akantu::dblIn, __func__ << "()")

	#define AKANTU_DEBUG_OUT() \
	AKANTU_DEBUG_("<==", ::akantu::dblOut, __func__ << "()")

	#define AKANTU_DEBUG_INFO(info) AKANTU_DEBUG_("---", ::akantu::dblInfo, info)

	#define AKANTU_DEBUG_WARNING(info) \
	AKANTU_DEBUG_("/!\\", ::akantu::dblWarning, info)

	#define AKANTU_DEBUG_TRACE(info) AKANTU_DEBUG_(">>>", ::akantu::dblTrace, info)

	#define AKANTU_DEBUG_ASSERT(test, info) \
	do { \
	if (not(test)) \
	AKANTU_CUSTOM_EXCEPTION_INFO(::akantu::debug::AssertException(), \
	"assert [" << #test << "] " << info); \
	} while (false)

	#define AKANTU_ERROR(info) \
	do { \
	AKANTU_DEBUG_("!!! ", ::akantu::dblError, info); \
	AKANTU_CUSTOM_EXCEPTION_INFO(::akantu::debug::CriticalError(), info); \
	} while (false)
	#endif // AKANTU_NDEBUG

	#define AKANTU_TO_IMPLEMENT() \
	AKANTU_CUSTOM_EXCEPTION_INFO(::akantu::debug::NotImplementedException(), \
	__func__ << " : not implemented yet !")

	/* -------------------------------------------------------------------------- */

	namespace debug {
	/* ------------------------------------------------------------------------ */
	template <class Except>
	void Debugger::throwCustomException(const Except & ex,
	const std::string & info,
	const std::string & file,
	unsigned int line) const noexcept(false) {
	auto & nc_ex = const_cast<Except &>(ex);
	nc_ex.setInfo(info);
	nc_ex.setFile(file);
	nc_ex.setLine(line);
	throw ex;
	}
	/* ------------------------------------------------------------------------ */
	template <class Except>
	void Debugger::throwCustomException(const Except & ex,
	const std::string & file,
	unsigned int line) const noexcept(false) {
	auto & nc_ex = const_cast<Except &>(ex);
	nc_ex.setFile(file);
	nc_ex.setLine(line);
	throw ex;
	}
	} // namespace debug
	} // namespace akantu

	#endif /* __AKANTU_ERROR_HH__ */

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