/*! \file pilibrary.h
 * \ingroup System
 * \~\brief
 * \~english Run-time library
 * \~russian Run-time библиотека
 */
/*
    PIP - Platform Independent Primitives
    Dynamic library
    Ivan Pelipenko peri4ko@yandex.ru

    This program 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.

    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PILIBRARY_H
#define PILIBRARY_H

#ifndef MICRO_PIP

#  include "pistring.h"

//! \ingroup System
//! \~\brief
//! \~english Run-time library.
//! \~russian Run-time библиотека.
class PIP_EXPORT PILibrary {
public:
	//! \~english Constructs %PILibrary and load if "path_" not empty
	//! \~russian Создает %PILibrary и загружает если "path_" не пустой
	PILibrary(const PIString & path_ = PIString());

	//! \~english Destroy %PILibrary, unload if library was loaded
	//! \~russian Уничтожает %PILibrary и выгружает библиотеку, если она была загружена
	~PILibrary();


	//! \~english Load library with relative or absolute path "path_"
	//! \~russian Загружает библиотеку по относительному или абсолютному пути "path_"
	bool load(const PIString & path_);

	//! \~english Load library with \a path() path
	//! \~russian Загружает библиотеку по пути \a path()
	bool load();

	//! \~english Unload library if it was loaded
	//! \~russian Выгружает библиотеку, если она была загружена
	void unload();

	//! \~english Obtain exported library method with name "symbol"
	//! \~russian Получает экспортированный метод библиотеки с именем "symbol"
	void * resolve(const char * symbol);


	//! \~english Returns if library successfully loaded
	//! \~russian Возвращает успешно ли загружена библиотека
	bool isLoaded() const;

	//! \~english Returns library path
	//! \~russian Возвращает путь к библиотеке
	PIString path() const { return libpath; }

	//! \~english Returns last occured error in human-readable format
	//! \~russian Возвращает последнюю ошибку в читаемом виде
	PIString lastError() const { return liberror; }

private:
	bool loadInternal();
	void getLastError();

	PRIVATE_DECLARATION(PIP_EXPORT)
	PIString libpath, liberror;
};

#endif // MICRO_PIP
#endif // PILIBRARY_H