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/*
(C) Gustav Hartvigsson, 2013.
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.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __H_BASE_OBJECT__
#define __H_BASE_OBJECT__
/* ---------------------------------------------------
* This is just a test of creating a small typesystem.
* It will include refrence counting.
* ---------------------------------------------------
*/
/**
* The class holds all the "virtual" functions/methods that are to be used with
* the object.
*
* This is an opaque data structure.
*/
typedef struct _BaseObjectClass BaseObjectClass;
/**
* The instance holds the data that is associated with the object.
* it also holds a pointer to the class of the object.
*
* This is an opaque data structure.
*/
typedef struct _BaseObjectInstance BaseObjectInstance;
/* internal structure of the structs are as follows:
typedef struct _BaseObjectClass {
// BaseObjectInstance * (* initize)(* BaseObjectInstance);
void (* deinitize)(* BaseObjectInstance);
int (* ref)(* BaseObjectInstance);
int (* unref)(* BaseObjectInstance);
int (* get_refcount)(* BaseObjectInstance);
char * (* to_string)(* BaseObjectInstance);
};
typedef struct _BaseObjectInstance {
BaseObjectClass * base_class;
unsigned int refcount = 0;
};
*/
/* -----------------
* Helper functions...
* -----------------
*/
/**
* This function is used to set the method to initize a new instance of an
* object.
*
* This has no use, rely...(?)
*/
// void base_object_set_init_method (BaseObjectInstance * self, BaseObjectInstance * (* method)(* BaseObjectInstance));
/**
* This function is used to set the method to deinitize an object.
*
* set it to a method that deinitize your object.
*/
void base_object_set_deinit_method (BaseObjectInstance * self, void (* method)(* BaseObjectInstance));
/**
* This fuction is used to set the ref method.
*
* DO NOT USE THIS UNLESS YOU KNOW WHAT YOU ARE DOING.
*/
void base_object_set_ref_method (BaseObjectInstance * self, int (* method)(* BaseObjectInstance));
/**
* This fuction is used to set the unref method.
*
* DO NOT USE THIS UNLESS YOU KNOW WHAT YOU ARE DOING.
*/
void base_object_set_unref_method (BaseObjectInstance * self, int (* method)(* BaseObjectInstance));
/**
* This fuction is used to set the get_refcount method.
*
* DO NOT USE THIS UNLESS YOU KNOW WHAT YOU ARE DOING.
*/
void base_object_set_get_refcount_method (BaseObjectInstance * self, int (* method)(* BaseObjectInstance));
/**
* This fuction is used to set the to_string method.
*/
void base_object_set_to_string_method (BaseObjectInstance * self, char * (* method)(* BaseObjectInstance));
/*
* concreate functions are defined in the C file.
*/
/* ----------------------
* Base object functions.
* ----------------------
*/
/**
* This function initizes an intance of the BaseObject, it also sets the methods
* to be used with the object and sets the refrence count to one.
*/
void base_object_initize (BaseObjectInstance * self);
/**
* This function creates a new base object.
*/
BaseObjectInstance * base_object_new ();
/**
* This function deinitizes/frees an object even if it is still referenced.
* This is usualy a bad idea, use base_object_unref instead.
*/
void base_object_free (BaseObjectInstance * self);
/**
* This function gets the class (which hold the object methods).
*/
BaseObjectClass * base_object_get_class (BaseObjectInstance * self);
/**
* This function sets the instance class of an object.
*/
void base_object_set_class (BaseObjectInstance * self, BaseObjectClass * klass);
/**
* This function is used to decrese the reference count of an object.
* When an object reaches zero, it will deinitize the object using the objects
* deititize method.
*
* It returns the current (after change) reference count.
*/
int base_object_unref (BaseObjectInstance * self);
/**
* This function is used to increse the reference count of an object.
*
* Returns the current (after change) reference count.
*/
int base_object_ref (BaseObjectInstance * self);
/**
* This function returns the current reference count without chaning it.
*/
int base_object_get_refcount (BaseObjectInstance * self);
/**
* This function returns a textual (string) that represesnts the object.
* The method can be set using base_object_set_to_string_method.
*
* Note: The string that is returned must be freed.
*/
char * base_object_to_string (BaseObjectInstance * self);
#endif
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