edelib-global.h

/*
 * $Id: edelib-global.h 3328 2012-05-25 14:24:02Z karijes $
 *
 * Base defs for edelib
 * Copyright (c) 2005-2009 edelib authors
 *
 * This library 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 2 of the License, or (at your option) any later version.
 *
 * This library 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 library.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __EDELIB_EDELIB_GLOBAL_H__
#define __EDELIB_EDELIB_GLOBAL_H__

/* Needed so we don't have to include necessary libraries.  */
#ifndef NULL
# ifndef __cplusplus
#  define NULL ((void*)0)
# else 
#  define NULL 0
# endif
#endif

#ifndef EDELIB_NS
# define EDELIB_NS edelib
#endif

#ifdef EDELIB_NS
# define EDELIB_NS_BEGIN namespace EDELIB_NS {
# define EDELIB_NS_END   }
#else
# define EDELIB_NS_BEGIN
# define EDELIB_NS_END
#endif

#ifdef EDELIB_NS
# define EDELIB_NS_USE using namespace EDELIB_NS;
#else
# define EDELIB_NS_USE
#endif

#ifdef EDELIB_NS
# define EDELIB_NS_USING(n) using EDELIB_NS::n;
#else
# define EDELIB_NS_USING(n)
#endif

#ifdef EDELIB_NS
# define EDELIB_NS_USING_AS(old_name, new_name) typedef EDELIB_NS::old_name new_name;
#else
# define EDELIB_NS_USING_AS(old_name, new_name) typedef old_name new_name;
#endif

#ifdef EDELIB_NS
# define EDELIB_NS_PREPEND(n) EDELIB_NS::n
#else
# define EDELIB_NS_PREPEND(n) n
#endif

#include "for-each-macro.h"

#ifdef EDELIB_FOR_EACH_FUNC
# define EDELIB_FOR_EACH_FUNC_OLD__ EDELIB_FOR_EACH_FUNC
#endif

#define EDELIB_FOR_EACH_FUNC EDELIB_NS_USING
#define EDELIB_NS_USING_LIST(n, list) EDELIB_FOR_EACH(n, list)

#ifdef EDELIB_FOR_EACH_FUNC_OLD__
# define EDELIB_FOR_EACH_FUNC EDELIB_FOR_EACH_FUNC_OLD__
# undef EDELIB_FOR_EACH_FUNC_OLD__
#endif

#if __GNUC__ >= 4
# define E_EXPORT __attribute__ ((visibility("default")))
# define E_NO_EXPORT __attribute__ ((visibility("hidden")))
#else
# define E_EXPORT
# define E_NO_EXPORT
#endif

#define EDELIB_API E_EXPORT
#define EDELIB_NO_API E_NO_EXPORT

#define E_DISABLE_CLASS_COPY(klass) \
        klass(const klass&);            \
        klass& operator=(klass&);

#define E_CLASS_GLOBAL_DECLARE(klass) \
        static klass* global(void);

#define E_CLASS_GLOBAL_IMPLEMENT(klass) \
        klass* klass::global(void) {        \
                static klass obj;               \
                return &obj;                    \
        }

#define E_CLASS_GLOBAL_EXPLICIT_DECLARE(klass) \
        static void init(void);                    \
        static void shutdown(void);                \
        static bool inited(void);                  \
        static klass* global(void);

#define E_CLASS_GLOBAL_EXPLICIT_IMPLEMENT(klass)                           \
        klass* klass##_instance = NULL;                                        \
                                                                           \
        void klass::init(void) {                                               \
                if(!klass##_instance)                                              \
                        klass##_instance = new klass();                                \
        }                                                                      \
                                                                           \
        void klass::shutdown(void) {                                           \
                delete klass##_instance;                                           \
                klass##_instance = NULL;                                           \
        }                                                                      \
                                                                           \
        bool klass::inited(void) {                                             \
                return (klass##_instance != NULL);                                 \
        }                                                                      \
                                                                           \
        klass* klass::global(void) {                                           \
                E_ASSERT(klass##_instance != NULL && "Did you run init() first?"); \
                return klass##_instance;                                           \
        }
                                                

#ifdef __GNUC__
# define EDELIB_DEPRECATED __attribute__ ((deprecated))
#else
# define EDELIB_DEPRECATED
#endif

#include "edelib-config.h"
#endif